diff options
| author | Vicent Marti <tanoku@gmail.com> | 2014-09-02 01:10:54 +0200 |
|---|---|---|
| committer | Vicent Marti <tanoku@gmail.com> | 2014-09-09 03:37:09 +0200 |
| commit | e216094e2192c05ddbd0988458eb8c0012e7baf8 (patch) | |
| tree | c63cfe1f43c0895712a3fbef782bda9144b9b75b /src/bstrlib.c | |
| parent | 2cf0750a7a507eded4cf3c9a48fd1f924d0ce538 (diff) | |
lol
Diffstat (limited to 'src/bstrlib.c')
| -rw-r--r-- | src/bstrlib.c | 2979 |
1 files changed, 0 insertions, 2979 deletions
diff --git a/src/bstrlib.c b/src/bstrlib.c deleted file mode 100644 index 1b19dbe..0000000 --- a/src/bstrlib.c +++ /dev/null @@ -1,2979 +0,0 @@ -/*
- * This source file is part of the bstring string library. This code was
- * written by Paul Hsieh in 2002-2010, and is covered by either the 3-clause
- * BSD open source license or GPL v2.0. Refer to the accompanying documentation
- * for details on usage and license.
- */
-
-/*
- * bstrlib.c
- *
- * This file is the core module for implementing the bstring functions.
- */
-
-#if defined (_MSC_VER)
-/* These warnings from MSVC++ are totally pointless. */
-# define _CRT_SECURE_NO_WARNINGS
-#endif
-
-#include <stdio.h>
-#include <stddef.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include "bstrlib.h"
-
-/* Optionally include a mechanism for debugging memory */
-
-#if defined(MEMORY_DEBUG) || defined(BSTRLIB_MEMORY_DEBUG)
-#include "memdbg.h"
-#endif
-
-#ifndef bstr__alloc
-#define bstr__alloc(x) malloc (x)
-#endif
-
-#ifndef bstr__free
-#define bstr__free(p) free (p)
-#endif
-
-#ifndef bstr__realloc
-#define bstr__realloc(p,x) realloc ((p), (x))
-#endif
-
-#ifndef bstr__memcpy
-#define bstr__memcpy(d,s,l) memcpy ((d), (s), (l))
-#endif
-
-#ifndef bstr__memmove
-#define bstr__memmove(d,s,l) memmove ((d), (s), (l))
-#endif
-
-#ifndef bstr__memset
-#define bstr__memset(d,c,l) memset ((d), (c), (l))
-#endif
-
-#ifndef bstr__memcmp
-#define bstr__memcmp(d,c,l) memcmp ((d), (c), (l))
-#endif
-
-#ifndef bstr__memchr
-#define bstr__memchr(s,c,l) memchr ((s), (c), (l))
-#endif
-
-/* Just a length safe wrapper for memmove. */
-
-#define bBlockCopy(D,S,L) { if ((L) > 0) bstr__memmove ((D),(S),(L)); }
-
-/* Compute the snapped size for a given requested size. By snapping to powers
- of 2 like this, repeated reallocations are avoided. */
-static int snapUpSize (int i) {
- if (i < 8) {
- i = 8;
- } else {
- unsigned int j;
- j = (unsigned int) i;
-
- j |= (j >> 1);
- j |= (j >> 2);
- j |= (j >> 4);
- j |= (j >> 8); /* Ok, since int >= 16 bits */
-#if (UINT_MAX != 0xffff)
- j |= (j >> 16); /* For 32 bit int systems */
-#if (UINT_MAX > 0xffffffffUL)
- j |= (j >> 32); /* For 64 bit int systems */
-#endif
-#endif
- /* Least power of two greater than i */
- j++;
- if ((int) j >= i) i = (int) j;
- }
- return i;
-}
-
-/* int balloc (bstring b, int len)
- *
- * Increase the size of the memory backing the bstring b to at least len.
- */
-int balloc (bstring b, int olen) {
- int len;
- if (b == NULL || b->data == NULL || b->slen < 0 || b->mlen <= 0 ||
- b->mlen < b->slen || olen <= 0) {
- return BSTR_ERR;
- }
-
- if (olen >= b->mlen) {
- unsigned char * x;
-
- if ((len = snapUpSize (olen)) <= b->mlen) return BSTR_OK;
-
- /* Assume probability of a non-moving realloc is 0.125 */
- if (7 * b->mlen < 8 * b->slen) {
-
- /* If slen is close to mlen in size then use realloc to reduce
- the memory defragmentation */
-
- reallocStrategy:;
-
- x = (unsigned char *) bstr__realloc (b->data, (size_t) len);
- if (x == NULL) {
-
- /* Since we failed, try allocating the tighest possible
- allocation */
-
- if (NULL == (x = (unsigned char *) bstr__realloc (b->data, (size_t) (len = olen)))) {
- return BSTR_ERR;
- }
- }
- } else {
-
- /* If slen is not close to mlen then avoid the penalty of copying
- the extra bytes that are allocated, but not considered part of
- the string */
-
- if (NULL == (x = (unsigned char *) bstr__alloc ((size_t) len))) {
-
- /* Perhaps there is no available memory for the two
- allocations to be in memory at once */
-
- goto reallocStrategy;
-
- } else {
- if (b->slen) bstr__memcpy ((char *) x, (char *) b->data, (size_t) b->slen);
- bstr__free (b->data);
- }
- }
- b->data = x;
- b->mlen = len;
- b->data[b->slen] = (unsigned char) '\0';
- }
-
- return BSTR_OK;
-}
-
-/* int ballocmin (bstring b, int len)
- *
- * Set the size of the memory backing the bstring b to len or b->slen+1,
- * whichever is larger. Note that repeated use of this function can degrade
- * performance.
- */
-int ballocmin (bstring b, int len) {
- unsigned char * s;
-
- if (b == NULL || b->data == NULL || (b->slen+1) < 0 || b->mlen <= 0 ||
- b->mlen < b->slen || len <= 0) {
- return BSTR_ERR;
- }
-
- if (len < b->slen + 1) len = b->slen + 1;
-
- if (len != b->mlen) {
- s = (unsigned char *) bstr__realloc (b->data, (size_t) len);
- if (NULL == s) return BSTR_ERR;
- s[b->slen] = (unsigned char) '\0';
- b->data = s;
- b->mlen = len;
- }
-
- return BSTR_OK;
-}
-
-/* bstring bfromcstr (const char * str)
- *
- * Create a bstring which contains the contents of the '\0' terminated char *
- * buffer str.
- */
-bstring bfromcstr (const char * str) {
-bstring b;
-int i;
-size_t j;
-
- if (str == NULL) return NULL;
- j = (strlen) (str);
- i = snapUpSize ((int) (j + (2 - (j != 0))));
- if (i <= (int) j) return NULL;
-
- b = (bstring) bstr__alloc (sizeof (struct tagbstring));
- if (NULL == b) return NULL;
- b->slen = (int) j;
- if (NULL == (b->data = (unsigned char *) bstr__alloc (b->mlen = i))) {
- bstr__free (b);
- return NULL;
- }
-
- bstr__memcpy (b->data, str, j+1);
- return b;
-}
-
-/* bstring bfromcstralloc (int mlen, const char * str)
- *
- * Create a bstring which contains the contents of the '\0' terminated char *
- * buffer str. The memory buffer backing the string is at least len
- * characters in length.
- */
-bstring bfromcstralloc (int mlen, const char * str) {
-bstring b;
-int i;
-size_t j;
-
- if (str == NULL) return NULL;
- j = (strlen) (str);
- i = snapUpSize ((int) (j + (2 - (j != 0))));
- if (i <= (int) j) return NULL;
-
- b = (bstring) bstr__alloc (sizeof (struct tagbstring));
- if (b == NULL) return NULL;
- b->slen = (int) j;
- if (i < mlen) i = mlen;
-
- if (NULL == (b->data = (unsigned char *) bstr__alloc (b->mlen = i))) {
- bstr__free (b);
- return NULL;
- }
-
- bstr__memcpy (b->data, str, j+1);
- return b;
-}
-
-/* bstring blk2bstr (const void * blk, int len)
- *
- * Create a bstring which contains the content of the block blk of length
- * len.
- */
-bstring blk2bstr (const void * blk, int len) {
-bstring b;
-int i;
-
- if (blk == NULL || len < 0) return NULL;
- b = (bstring) bstr__alloc (sizeof (struct tagbstring));
- if (b == NULL) return NULL;
- b->slen = len;
-
- i = len + (2 - (len != 0));
- i = snapUpSize (i);
-
- b->mlen = i;
-
- b->data = (unsigned char *) bstr__alloc ((size_t) b->mlen);
- if (b->data == NULL) {
- bstr__free (b);
- return NULL;
- }
-
- if (len > 0) bstr__memcpy (b->data, blk, (size_t) len);
- b->data[len] = (unsigned char) '\0';
-
- return b;
-}
-
-/* char * bstr2cstr (const_bstring s, char z)
- *
- * Create a '\0' terminated char * buffer which is equal to the contents of
- * the bstring s, except that any contained '\0' characters are converted
- * to the character in z. This returned value should be freed with a
- * bcstrfree () call, by the calling application.
- */
-char * bstr2cstr (const_bstring b, char z) {
-int i, l;
-char * r;
-
- if (b == NULL || b->slen < 0 || b->data == NULL) return NULL;
- l = b->slen;
- r = (char *) bstr__alloc ((size_t) (l + 1));
- if (r == NULL) return r;
-
- for (i=0; i < l; i ++) {
- r[i] = (char) ((b->data[i] == '\0') ? z : (char) (b->data[i]));
- }
-
- r[l] = (unsigned char) '\0';
-
- return r;
-}
-
-/* int bcstrfree (char * s)
- *
- * Frees a C-string generated by bstr2cstr (). This is normally unnecessary
- * since it just wraps a call to bstr__free (), however, if bstr__alloc ()
- * and bstr__free () have been redefined as a macros within the bstrlib
- * module (via defining them in memdbg.h after defining
- * BSTRLIB_MEMORY_DEBUG) with some difference in behaviour from the std
- * library functions, then this allows a correct way of freeing the memory
- * that allows higher level code to be independent from these macro
- * redefinitions.
- */
-int bcstrfree (char * s) {
- if (s) {
- bstr__free (s);
- return BSTR_OK;
- }
- return BSTR_ERR;
-}
-
-/* int bconcat (bstring b0, const_bstring b1)
- *
- * Concatenate the bstring b1 to the bstring b0.
- */
-int bconcat (bstring b0, const_bstring b1) {
-int len, d;
-bstring aux = (bstring) b1;
-
- if (b0 == NULL || b1 == NULL || b0->data == NULL || b1->data == NULL) return BSTR_ERR;
-
- d = b0->slen;
- len = b1->slen;
- if ((d | (b0->mlen - d) | len | (d + len)) < 0) return BSTR_ERR;
-
- if (b0->mlen <= d + len + 1) {
- ptrdiff_t pd = b1->data - b0->data;
- if (0 <= pd && pd < b0->mlen) {
- if (NULL == (aux = bstrcpy (b1))) return BSTR_ERR;
- }
- if (balloc (b0, d + len + 1) != BSTR_OK) {
- if (aux != b1) bdestroy (aux);
- return BSTR_ERR;
- }
- }
-
- bBlockCopy (&b0->data[d], &aux->data[0], (size_t) len);
- b0->data[d + len] = (unsigned char) '\0';
- b0->slen = d + len;
- if (aux != b1) bdestroy (aux);
- return BSTR_OK;
-}
-
-/* int bconchar (bstring b, char c)
-/ *
- * Concatenate the single character c to the bstring b.
- */
-int bconchar (bstring b, char c) {
-int d;
-
- if (b == NULL) return BSTR_ERR;
- d = b->slen;
- if ((d | (b->mlen - d)) < 0 || balloc (b, d + 2) != BSTR_OK) return BSTR_ERR;
- b->data[d] = (unsigned char) c;
- b->data[d + 1] = (unsigned char) '\0';
- b->slen++;
- return BSTR_OK;
-}
-
-/* int bcatcstr (bstring b, const char * s)
- *
- * Concatenate a char * string to a bstring.
- */
-int bcatcstr (bstring b, const char * s) {
-char * d;
-int i, l;
-
- if (b == NULL || b->data == NULL || b->slen < 0 || b->mlen < b->slen
- || b->mlen <= 0 || s == NULL) return BSTR_ERR;
-
- /* Optimistically concatenate directly */
- l = b->mlen - b->slen;
- d = (char *) &b->data[b->slen];
- for (i=0; i < l; i++) {
- if ((*d++ = *s++) == '\0') {
- b->slen += i;
- return BSTR_OK;
- }
- }
- b->slen += i;
-
- /* Need to explicitely resize and concatenate tail */
- return bcatblk (b, (const void *) s, (int) strlen (s));
-}
-
-/* int bcatblk (bstring b, const void * s, int len)
- *
- * Concatenate a fixed length buffer to a bstring.
- */
-int bcatblk (bstring b, const void * s, int len) {
-int nl;
-
- if (b == NULL || b->data == NULL || b->slen < 0 || b->mlen < b->slen
- || b->mlen <= 0 || s == NULL || len < 0) return BSTR_ERR;
-
- if (0 > (nl = b->slen + len)) return BSTR_ERR; /* Overflow? */
- if (b->mlen <= nl && 0 > balloc (b, nl + 1)) return BSTR_ERR;
-
- bBlockCopy (&b->data[b->slen], s, (size_t) len);
- b->slen = nl;
- b->data[nl] = (unsigned char) '\0';
- return BSTR_OK;
-}
-
-/* bstring bstrcpy (const_bstring b)
- *
- * Create a copy of the bstring b.
- */
-bstring bstrcpy (const_bstring b) {
-bstring b0;
-int i,j;
-
- /* Attempted to copy an invalid string? */
- if (b == NULL || b->slen < 0 || b->data == NULL) return NULL;
-
- b0 = (bstring) bstr__alloc (sizeof (struct tagbstring));
- if (b0 == NULL) {
- /* Unable to allocate memory for string header */
- return NULL;
- }
-
- i = b->slen;
- j = snapUpSize (i + 1);
-
- b0->data = (unsigned char *) bstr__alloc (j);
- if (b0->data == NULL) {
- j = i + 1;
- b0->data = (unsigned char *) bstr__alloc (j);
- if (b0->data == NULL) {
- /* Unable to allocate memory for string data */
- bstr__free (b0);
- return NULL;
- }
- }
-
- b0->mlen = j;
- b0->slen = i;
-
- if (i) bstr__memcpy ((char *) b0->data, (char *) b->data, i);
- b0->data[b0->slen] = (unsigned char) '\0';
-
- return b0;
-}
-
-/* int bassign (bstring a, const_bstring b)
- *
- * Overwrite the string a with the contents of string b.
- */
-int bassign (bstring a, const_bstring b) {
- if (b == NULL || b->data == NULL || b->slen < 0)
- return BSTR_ERR;
- if (b->slen != 0) {
- if (balloc (a, b->slen) != BSTR_OK) return BSTR_ERR;
- bstr__memmove (a->data, b->data, b->slen);
- } else {
- if (a == NULL || a->data == NULL || a->mlen < a->slen ||
- a->slen < 0 || a->mlen == 0)
- return BSTR_ERR;
- }
- a->data[b->slen] = (unsigned char) '\0';
- a->slen = b->slen;
- return BSTR_OK;
-}
-
-/* int bassignmidstr (bstring a, const_bstring b, int left, int len)
- *
- * Overwrite the string a with the middle of contents of string b
- * starting from position left and running for a length len. left and
- * len are clamped to the ends of b as with the function bmidstr.
- */
-int bassignmidstr (bstring a, const_bstring b, int left, int len) {
- if (b == NULL || b->data == NULL || b->slen < 0)
- return BSTR_ERR;
-
- if (left < 0) {
- len += left;
- left = 0;
- }
-
- if (len > b->slen - left) len = b->slen - left;
-
- if (a == NULL || a->data == NULL || a->mlen < a->slen ||
- a->slen < 0 || a->mlen == 0)
- return BSTR_ERR;
-
- if (len > 0) {
- if (balloc (a, len) != BSTR_OK) return BSTR_ERR;
- bstr__memmove (a->data, b->data + left, len);
- a->slen = len;
- } else {
- a->slen = 0;
- }
- a->data[a->slen] = (unsigned char) '\0';
- return BSTR_OK;
-}
-
-/* int bassigncstr (bstring a, const char * str)
- *
- * Overwrite the string a with the contents of char * string str. Note that
- * the bstring a must be a well defined and writable bstring. If an error
- * occurs BSTR_ERR is returned however a may be partially overwritten.
- */
-int bassigncstr (bstring a, const char * str) {
-int i;
-size_t len;
- if (a == NULL || a->data == NULL || a->mlen < a->slen ||
- a->slen < 0 || a->mlen == 0 || NULL == str)
- return BSTR_ERR;
-
- for (i=0; i < a->mlen; i++) {
- if ('\0' == (a->data[i] = str[i])) {
- a->slen = i;
- return BSTR_OK;
- }
- }
-
- a->slen = i;
- len = strlen (str + i);
- if (len > INT_MAX || i + len + 1 > INT_MAX ||
- 0 > balloc (a, (int) (i + len + 1))) return BSTR_ERR;
- bBlockCopy (a->data + i, str + i, (size_t) len + 1);
- a->slen += (int) len;
- return BSTR_OK;
-}
-
-/* int bassignblk (bstring a, const void * s, int len)
- *
- * Overwrite the string a with the contents of the block (s, len). Note that
- * the bstring a must be a well defined and writable bstring. If an error
- * occurs BSTR_ERR is returned and a is not overwritten.
- */
-int bassignblk (bstring a, const void * s, int len) {
- if (a == NULL || a->data == NULL || a->mlen < a->slen ||
- a->slen < 0 || a->mlen == 0 || NULL == s || len + 1 < 1)
- return BSTR_ERR;
- if (len + 1 > a->mlen && 0 > balloc (a, len + 1)) return BSTR_ERR;
- bBlockCopy (a->data, s, (size_t) len);
- a->data[len] = (unsigned char) '\0';
- a->slen = len;
- return BSTR_OK;
-}
-
-/* int btrunc (bstring b, int n)
- *
- * Truncate the bstring to at most n characters.
- */
-int btrunc (bstring b, int n) {
- if (n < 0 || b == NULL || b->data == NULL || b->mlen < b->slen ||
- b->slen < 0 || b->mlen <= 0) return BSTR_ERR;
- if (b->slen > n) {
- b->slen = n;
- b->data[n] = (unsigned char) '\0';
- }
- return BSTR_OK;
-}
-
-#define upcase(c) (toupper ((unsigned char) c))
-#define downcase(c) (tolower ((unsigned char) c))
-#define wspace(c) (isspace ((unsigned char) c))
-
-/* int btoupper (bstring b)
- *
- * Convert contents of bstring to upper case.
- */
-int btoupper (bstring b) {
-int i, len;
- if (b == NULL || b->data == NULL || b->mlen < b->slen ||
- b->slen < 0 || b->mlen <= 0) return BSTR_ERR;
- for (i=0, len = b->slen; i < len; i++) {
- b->data[i] = (unsigned char) upcase (b->data[i]);
- }
- return BSTR_OK;
-}
-
-/* int btolower (bstring b)
- *
- * Convert contents of bstring to lower case.
- */
-int btolower (bstring b) {
-int i, len;
- if (b == NULL || b->data == NULL || b->mlen < b->slen ||
- b->slen < 0 || b->mlen <= 0) return BSTR_ERR;
- for (i=0, len = b->slen; i < len; i++) {
- b->data[i] = (unsigned char) downcase (b->data[i]);
- }
- return BSTR_OK;
-}
-
-/* int bstricmp (const_bstring b0, const_bstring b1)
- *
- * Compare two strings without differentiating between case. The return
- * value is the difference of the values of the characters where the two
- * strings first differ after lower case transformation, otherwise 0 is
- * returned indicating that the strings are equal. If the lengths are
- * different, then a difference from 0 is given, but if the first extra
- * character is '\0', then it is taken to be the value UCHAR_MAX+1.
- */
-int bstricmp (const_bstring b0, const_bstring b1) {
-int i, v, n;
-
- if (bdata (b0) == NULL || b0->slen < 0 ||
- bdata (b1) == NULL || b1->slen < 0) return SHRT_MIN;
- if ((n = b0->slen) > b1->slen) n = b1->slen;
- else if (b0->slen == b1->slen && b0->data == b1->data) return BSTR_OK;
-
- for (i = 0; i < n; i ++) {
- v = (char) downcase (b0->data[i])
- - (char) downcase (b1->data[i]);
- if (0 != v) return v;
- }
-
- if (b0->slen > n) {
- v = (char) downcase (b0->data[n]);
- if (v) return v;
- return UCHAR_MAX + 1;
- }
- if (b1->slen > n) {
- v = - (char) downcase (b1->data[n]);
- if (v) return v;
- return - (int) (UCHAR_MAX + 1);
- }
- return BSTR_OK;
-}
-
-/* int bstrnicmp (const_bstring b0, const_bstring b1, int n)
- *
- * Compare two strings without differentiating between case for at most n
- * characters. If the position where the two strings first differ is
- * before the nth position, the return value is the difference of the values
- * of the characters, otherwise 0 is returned. If the lengths are different
- * and less than n characters, then a difference from 0 is given, but if the
- * first extra character is '\0', then it is taken to be the value
- * UCHAR_MAX+1.
- */
-int bstrnicmp (const_bstring b0, const_bstring b1, int n) {
-int i, v, m;
-
- if (bdata (b0) == NULL || b0->slen < 0 ||
- bdata (b1) == NULL || b1->slen < 0 || n < 0) return SHRT_MIN;
- m = n;
- if (m > b0->slen) m = b0->slen;
- if (m > b1->slen) m = b1->slen;
-
- if (b0->data != b1->data) {
- for (i = 0; i < m; i ++) {
- v = (char) downcase (b0->data[i]);
- v -= (char) downcase (b1->data[i]);
- if (v != 0) return b0->data[i] - b1->data[i];
- }
- }
-
- if (n == m || b0->slen == b1->slen) return BSTR_OK;
-
- if (b0->slen > m) {
- v = (char) downcase (b0->data[m]);
- if (v) return v;
- return UCHAR_MAX + 1;
- }
-
- v = - (char) downcase (b1->data[m]);
- if (v) return v;
- return - (int) (UCHAR_MAX + 1);
-}
-
-/* int biseqcaseless (const_bstring b0, const_bstring b1)
- *
- * Compare two strings for equality without differentiating between case.
- * If the strings differ other than in case, 0 is returned, if the strings
- * are the same, 1 is returned, if there is an error, -1 is returned. If
- * the length of the strings are different, this function is O(1). '\0'
- * termination characters are not treated in any special way.
- */
-int biseqcaseless (const_bstring b0, const_bstring b1) {
-int i, n;
-
- if (bdata (b0) == NULL || b0->slen < 0 ||
- bdata (b1) == NULL || b1->slen < 0) return BSTR_ERR;
- if (b0->slen != b1->slen) return BSTR_OK;
- if (b0->data == b1->data || b0->slen == 0) return 1;
- for (i=0, n=b0->slen; i < n; i++) {
- if (b0->data[i] != b1->data[i]) {
- unsigned char c = (unsigned char) downcase (b0->data[i]);
- if (c != (unsigned char) downcase (b1->data[i])) return 0;
- }
- }
- return 1;
-}
-
-/* int bisstemeqcaselessblk (const_bstring b0, const void * blk, int len)
- *
- * Compare beginning of string b0 with a block of memory of length len
- * without differentiating between case for equality. If the beginning of b0
- * differs from the memory block other than in case (or if b0 is too short),
- * 0 is returned, if the strings are the same, 1 is returned, if there is an
- * error, -1 is returned. '\0' characters are not treated in any special
- * way.
- */
-int bisstemeqcaselessblk (const_bstring b0, const void * blk, int len) {
-int i;
-
- if (bdata (b0) == NULL || b0->slen < 0 || NULL == blk || len < 0)
- return BSTR_ERR;
- if (b0->slen < len) return BSTR_OK;
- if (b0->data == (const unsigned char *) blk || len == 0) return 1;
-
- for (i = 0; i < len; i ++) {
- if (b0->data[i] != ((const unsigned char *) blk)[i]) {
- if (downcase (b0->data[i]) !=
- downcase (((const unsigned char *) blk)[i])) return 0;
- }
- }
- return 1;
-}
-
-/*
- * int bltrimws (bstring b)
- *
- * Delete whitespace contiguous from the left end of the string.
- */
-int bltrimws (bstring b) {
-int i, len;
-
- if (b == NULL || b->data == NULL || b->mlen < b->slen ||
- b->slen < 0 || b->mlen <= 0) return BSTR_ERR;
-
- for (len = b->slen, i = 0; i < len; i++) {
- if (!wspace (b->data[i])) {
- return bdelete (b, 0, i);
- }
- }
-
- b->data[0] = (unsigned char) '\0';
- b->slen = 0;
- return BSTR_OK;
-}
-
-/*
- * int brtrimws (bstring b)
- *
- * Delete whitespace contiguous from the right end of the string.
- */
-int brtrimws (bstring b) {
-int i;
-
- if (b == NULL || b->data == NULL || b->mlen < b->slen ||
- b->slen < 0 || b->mlen <= 0) return BSTR_ERR;
-
- for (i = b->slen - 1; i >= 0; i--) {
- if (!wspace (b->data[i])) {
- if (b->mlen > i) b->data[i+1] = (unsigned char) '\0';
- b->slen = i + 1;
- return BSTR_OK;
- }
- }
-
- b->data[0] = (unsigned char) '\0';
- b->slen = 0;
- return BSTR_OK;
-}
-
-/*
- * int btrimws (bstring b)
- *
- * Delete whitespace contiguous from both ends of the string.
- */
-int btrimws (bstring b) {
-int i, j;
-
- if (b == NULL || b->data == NULL || b->mlen < b->slen ||
- b->slen < 0 || b->mlen <= 0) return BSTR_ERR;
-
- for (i = b->slen - 1; i >= 0; i--) {
- if (!wspace (b->data[i])) {
- if (b->mlen > i) b->data[i+1] = (unsigned char) '\0';
- b->slen = i + 1;
- for (j = 0; wspace (b->data[j]); j++) {}
- return bdelete (b, 0, j);
- }
- }
-
- b->data[0] = (unsigned char) '\0';
- b->slen = 0;
- return BSTR_OK;
-}
-
-/* int biseq (const_bstring b0, const_bstring b1)
- *
- * Compare the string b0 and b1. If the strings differ, 0 is returned, if
- * the strings are the same, 1 is returned, if there is an error, -1 is
- * returned. If the length of the strings are different, this function is
- * O(1). '\0' termination characters are not treated in any special way.
- */
-int biseq (const_bstring b0, const_bstring b1) {
- if (b0 == NULL || b1 == NULL || b0->data == NULL || b1->data == NULL ||
- b0->slen < 0 || b1->slen < 0) return BSTR_ERR;
- if (b0->slen != b1->slen) return BSTR_OK;
- if (b0->data == b1->data || b0->slen == 0) return 1;
- return !bstr__memcmp (b0->data, b1->data, b0->slen);
-}
-
-/* int bisstemeqblk (const_bstring b0, const void * blk, int len)
- *
- * Compare beginning of string b0 with a block of memory of length len for
- * equality. If the beginning of b0 differs from the memory block (or if b0
- * is too short), 0 is returned, if the strings are the same, 1 is returned,
- * if there is an error, -1 is returned. '\0' characters are not treated in
- * any special way.
- */
-int bisstemeqblk (const_bstring b0, const void * blk, int len) {
-int i;
-
- if (bdata (b0) == NULL || b0->slen < 0 || NULL == blk || len < 0)
- return BSTR_ERR;
- if (b0->slen < len) return BSTR_OK;
- if (b0->data == (const unsigned char *) blk || len == 0) return 1;
-
- for (i = 0; i < len; i ++) {
- if (b0->data[i] != ((const unsigned char *) blk)[i]) return BSTR_OK;
- }
- return 1;
-}
-
-/* int biseqcstr (const_bstring b, const char *s)
- *
- * Compare the bstring b and char * string s. The C string s must be '\0'
- * terminated at exactly the length of the bstring b, and the contents
- * between the two must be identical with the bstring b with no '\0'
- * characters for the two contents to be considered equal. This is
- * equivalent to the condition that their current contents will be always be
- * equal when comparing them in the same format after converting one or the
- * other. If the strings are equal 1 is returned, if they are unequal 0 is
- * returned and if there is a detectable error BSTR_ERR is returned.
- */
-int biseqcstr (const_bstring b, const char * s) {
-int i;
- if (b == NULL || s == NULL || b->data == NULL || b->slen < 0) return BSTR_ERR;
- for (i=0; i < b->slen; i++) {
- if (s[i] == '\0' || b->data[i] != (unsigned char) s[i]) return BSTR_OK;
- }
- return s[i] == '\0';
-}
-
-/* int biseqcstrcaseless (const_bstring b, const char *s)
- *
- * Compare the bstring b and char * string s. The C string s must be '\0'
- * terminated at exactly the length of the bstring b, and the contents
- * between the two must be identical except for case with the bstring b with
- * no '\0' characters for the two contents to be considered equal. This is
- * equivalent to the condition that their current contents will be always be
- * equal ignoring case when comparing them in the same format after
- * converting one or the other. If the strings are equal, except for case,
- * 1 is returned, if they are unequal regardless of case 0 is returned and
- * if there is a detectable error BSTR_ERR is returned.
- */
-int biseqcstrcaseless (const_bstring b, const char * s) {
-int i;
- if (b == NULL || s == NULL || b->data == NULL || b->slen < 0) return BSTR_ERR;
- for (i=0; i < b->slen; i++) {
- if (s[i] == '\0' ||
- (b->data[i] != (unsigned char) s[i] &&
- downcase (b->data[i]) != (unsigned char) downcase (s[i])))
- return BSTR_OK;
- }
- return s[i] == '\0';
-}
-
-/* int bstrcmp (const_bstring b0, const_bstring b1)
- *
- * Compare the string b0 and b1. If there is an error, SHRT_MIN is returned,
- * otherwise a value less than or greater than zero, indicating that the
- * string pointed to by b0 is lexicographically less than or greater than
- * the string pointed to by b1 is returned. If the the string lengths are
- * unequal but the characters up until the length of the shorter are equal
- * then a value less than, or greater than zero, indicating that the string
- * pointed to by b0 is shorter or longer than the string pointed to by b1 is
- * returned. 0 is returned if and only if the two strings are the same. If
- * the length of the strings are different, this function is O(n). Like its
- * standard C library counter part strcmp, the comparison does not proceed
- * past any '\0' termination characters encountered.
- */
-int bstrcmp (const_bstring b0, const_bstring b1) {
-int i, v, n;
-
- if (b0 == NULL || b1 == NULL || b0->data == NULL || b1->data == NULL ||
- b0->slen < 0 || b1->slen < 0) return SHRT_MIN;
- n = b0->slen; if (n > b1->slen) n = b1->slen;
- if (b0->slen == b1->slen && (b0->data == b1->data || b0->slen == 0))
- return BSTR_OK;
-
- for (i = 0; i < n; i ++) {
- v = ((char) b0->data[i]) - ((char) b1->data[i]);
- if (v != 0) return v;
- if (b0->data[i] == (unsigned char) '\0') return BSTR_OK;
- }
-
- if (b0->slen > n) return 1;
- if (b1->slen > n) return -1;
- return BSTR_OK;
-}
-
-/* int bstrncmp (const_bstring b0, const_bstring b1, int n)
- *
- * Compare the string b0 and b1 for at most n characters. If there is an
- * error, SHRT_MIN is returned, otherwise a value is returned as if b0 and
- * b1 were first truncated to at most n characters then bstrcmp was called
- * with these new strings are paremeters. If the length of the strings are
- * different, this function is O(n). Like its standard C library counter
- * part strcmp, the comparison does not proceed past any '\0' termination
- * characters encountered.
- */
-int bstrncmp (const_bstring b0, const_bstring b1, int n) {
-int i, v, m;
-
- if (b0 == NULL || b1 == NULL || b0->data == NULL || b1->data == NULL ||
- b0->slen < 0 || b1->slen < 0) return SHRT_MIN;
- m = n;
- if (m > b0->slen) m = b0->slen;
- if (m > b1->slen) m = b1->slen;
-
- if (b0->data != b1->data) {
- for (i = 0; i < m; i ++) {
- v = ((char) b0->data[i]) - ((char) b1->data[i]);
- if (v != 0) return v;
- if (b0->data[i] == (unsigned char) '\0') return BSTR_OK;
- }
- }
-
- if (n == m || b0->slen == b1->slen) return BSTR_OK;
-
- if (b0->slen > m) return 1;
- return -1;
-}
-
-/* bstring bmidstr (const_bstring b, int left, int len)
- *
- * Create a bstring which is the substring of b starting from position left
- * and running for a length len (clamped by the end of the bstring b.) If
- * b is detectably invalid, then NULL is returned. The section described
- * by (left, len) is clamped to the boundaries of b.
- */
-bstring bmidstr (const_bstring b, int left, int len) {
-
- if (b == NULL || b->slen < 0 || b->data == NULL) return NULL;
-
- if (left < 0) {
- len += left;
- left = 0;
- }
-
- if (len > b->slen - left) len = b->slen - left;
-
- if (len <= 0) return bfromcstr ("");
- return blk2bstr (b->data + left, len);
-}
-
-/* int bdelete (bstring b, int pos, int len)
- *
- * Removes characters from pos to pos+len-1 inclusive and shifts the tail of
- * the bstring starting from pos+len to pos. len must be positive for this
- * call to have any effect. The section of the string described by (pos,
- * len) is clamped to boundaries of the bstring b.
- */
-int bdelete (bstring b, int pos, int len) {
- /* Clamp to left side of bstring */
- if (pos < 0) {
- len += pos;
- pos = 0;
- }
-
- if (len < 0 || b == NULL || b->data == NULL || b->slen < 0 ||
- b->mlen < b->slen || b->mlen <= 0)
- return BSTR_ERR;
- if (len > 0 && pos < b->slen) {
- if (pos + len >= b->slen) {
- b->slen = pos;
- } else {
- bBlockCopy ((char *) (b->data + pos),
- (char *) (b->data + pos + len),
- b->slen - (pos+len));
- b->slen -= len;
- }
- b->data[b->slen] = (unsigned char) '\0';
- }
- return BSTR_OK;
-}
-
-/* int bdestroy (bstring b)
- *
- * Free up the bstring. Note that if b is detectably invalid or not writable
- * then no action is performed and BSTR_ERR is returned. Like a freed memory
- * allocation, dereferences, writes or any other action on b after it has
- * been bdestroyed is undefined.
- */
-int bdestroy (bstring b) {
- if (b == NULL || b->slen < 0 || b->mlen <= 0 || b->mlen < b->slen ||
- b->data == NULL)
- return BSTR_ERR;
-
- bstr__free (b->data);
-
- /* In case there is any stale usage, there is one more chance to
- notice this error. */
-
- b->slen = -1;
- b->mlen = -__LINE__;
- b->data = NULL;
-
- bstr__free (b);
- return BSTR_OK;
-}
-
-/* int binstr (const_bstring b1, int pos, const_bstring b2)
- *
- * Search for the bstring b2 in b1 starting from position pos, and searching
- * forward. If it is found then return with the first position where it is
- * found, otherwise return BSTR_ERR. Note that this is just a brute force
- * string searcher that does not attempt clever things like the Boyer-Moore
- * search algorithm. Because of this there are many degenerate cases where
- * this can take much longer than it needs to.
- */
-int binstr (const_bstring b1, int pos, const_bstring b2) {
-int j, ii, ll, lf;
-unsigned char * d0;
-unsigned char c0;
-register unsigned char * d1;
-register unsigned char c1;
-register int i;
-
- if (b1 == NULL || b1->data == NULL || b1->slen < 0 ||
- b2 == NULL || b2->data == NULL || b2->slen < 0) return BSTR_ERR;
- if (b1->slen == pos) return (b2->slen == 0)?pos:BSTR_ERR;
- if (b1->slen < pos || pos < 0) return BSTR_ERR;
- if (b2->slen == 0) return pos;
-
- /* No space to find such a string? */
- if ((lf = b1->slen - b2->slen + 1) <= pos) return BSTR_ERR;
-
- /* An obvious alias case */
- if (b1->data == b2->data && pos == 0) return 0;
-
- i = pos;
-
- d0 = b2->data;
- d1 = b1->data;
- ll = b2->slen;
-
- /* Peel off the b2->slen == 1 case */
- c0 = d0[0];
- if (1 == ll) {
- for (;i < lf; i++) if (c0 == d1[i]) return i;
- return BSTR_ERR;
- }
-
- c1 = c0;
- j = 0;
- lf = b1->slen - 1;
-
- ii = -1;
- if (i < lf) do {
- /* Unrolled current character test */
- if (c1 != d1[i]) {
- if (c1 != d1[1+i]) {
- i += 2;
- continue;
- }
- i++;
- }
-
- /* Take note if this is the start of a potential match */
- if (0 == j) ii = i;
-
- /* Shift the test character down by one */
- j++;
- i++;
-
- /* If this isn't past the last character continue */
- if (j < ll) {
- c1 = d0[j];
- continue;
- }
-
- N0:;
-
- /* If no characters mismatched, then we matched */
- if (i == ii+j) return ii;
-
- /* Shift back to the beginning */
- i -= j;
- j = 0;
- c1 = c0;
- } while (i < lf);
-
- /* Deal with last case if unrolling caused a misalignment */
- if (i == lf && ll == j+1 && c1 == d1[i]) goto N0;
-
- return BSTR_ERR;
-}
-
-/* int binstrr (const_bstring b1, int pos, const_bstring b2)
- *
- * Search for the bstring b2 in b1 starting from position pos, and searching
- * backward. If it is found then return with the first position where it is
- * found, otherwise return BSTR_ERR. Note that this is just a brute force
- * string searcher that does not attempt clever things like the Boyer-Moore
- * search algorithm. Because of this there are many degenerate cases where
- * this can take much longer than it needs to.
- */
-int binstrr (const_bstring b1, int pos, const_bstring b2) {
-int j, i, l;
-unsigned char * d0, * d1;
-
- if (b1 == NULL || b1->data == NULL || b1->slen < 0 ||
- b2 == NULL || b2->data == NULL || b2->slen < 0) return BSTR_ERR;
- if (b1->slen == pos && b2->slen == 0) return pos;
- if (b1->slen < pos || pos < 0) return BSTR_ERR;
- if (b2->slen == 0) return pos;
-
- /* Obvious alias case */
- if (b1->data == b2->data && pos == 0 && b2->slen <= b1->slen) return 0;
-
- i = pos;
- if ((l = b1->slen - b2->slen) < 0) return BSTR_ERR;
-
- /* If no space to find such a string then snap back */
- if (l + 1 <= i) i = l;
- j = 0;
-
- d0 = b2->data;
- d1 = b1->data;
- l = b2->slen;
-
- for (;;) {
- if (d0[j] == d1[i + j]) {
- j ++;
- if (j >= l) return i;
- } else {
- i --;
- if (i < 0) break;
- j=0;
- }
- }
-
- return BSTR_ERR;
-}
-
-/* int binstrcaseless (const_bstring b1, int pos, const_bstring b2)
- *
- * Search for the bstring b2 in b1 starting from position pos, and searching
- * forward but without regard to case. If it is found then return with the
- * first position where it is found, otherwise return BSTR_ERR. Note that
- * this is just a brute force string searcher that does not attempt clever
- * things like the Boyer-Moore search algorithm. Because of this there are
- * many degenerate cases where this can take much longer than it needs to.
- */
-int binstrcaseless (const_bstring b1, int pos, const_bstring b2) {
-int j, i, l, ll;
-unsigned char * d0, * d1;
-
- if (b1 == NULL || b1->data == NULL || b1->slen < 0 ||
- b2 == NULL || b2->data == NULL || b2->slen < 0) return BSTR_ERR;
- if (b1->slen == pos) return (b2->slen == 0)?pos:BSTR_ERR;
- if (b1->slen < pos || pos < 0) return BSTR_ERR;
- if (b2->slen == 0) return pos;
-
- l = b1->slen - b2->slen + 1;
-
- /* No space to find such a string? */
- if (l <= pos) return BSTR_ERR;
-
- /* An obvious alias case */
- if (b1->data == b2->data && pos == 0) return BSTR_OK;
-
- i = pos;
- j = 0;
-
- d0 = b2->data;
- d1 = b1->data;
- ll = b2->slen;
-
- for (;;) {
- if (d0[j] == d1[i + j] || downcase (d0[j]) == downcase (d1[i + j])) {
- j ++;
- if (j >= ll) return i;
- } else {
- i ++;
- if (i >= l) break;
- j=0;
- }
- }
-
- return BSTR_ERR;
-}
-
-/* int binstrrcaseless (const_bstring b1, int pos, const_bstring b2)
- *
- * Search for the bstring b2 in b1 starting from position pos, and searching
- * backward but without regard to case. If it is found then return with the
- * first position where it is found, otherwise return BSTR_ERR. Note that
- * this is just a brute force string searcher that does not attempt clever
- * things like the Boyer-Moore search algorithm. Because of this there are
- * many degenerate cases where this can take much longer than it needs to.
- */
-int binstrrcaseless (const_bstring b1, int pos, const_bstring b2) {
-int j, i, l;
-unsigned char * d0, * d1;
-
- if (b1 == NULL || b1->data == NULL || b1->slen < 0 ||
- b2 == NULL || b2->data == NULL || b2->slen < 0) return BSTR_ERR;
- if (b1->slen == pos && b2->slen == 0) return pos;
- if (b1->slen < pos || pos < 0) return BSTR_ERR;
- if (b2->slen == 0) return pos;
-
- /* Obvious alias case */
- if (b1->data == b2->data && pos == 0 && b2->slen <= b1->slen) return BSTR_OK;
-
- i = pos;
- if ((l = b1->slen - b2->slen) < 0) return BSTR_ERR;
-
- /* If no space to find such a string then snap back */
- if (l + 1 <= i) i = l;
- j = 0;
-
- d0 = b2->data;
- d1 = b1->data;
- l = b2->slen;
-
- for (;;) {
- if (d0[j] == d1[i + j] || downcase (d0[j]) == downcase (d1[i + j])) {
- j ++;
- if (j >= l) return i;
- } else {
- i --;
- if (i < 0) break;
- j=0;
- }
- }
-
- return BSTR_ERR;
-}
-
-
-/* int bstrchrp (const_bstring b, int c, int pos)
- *
- * Search for the character c in b forwards from the position pos
- * (inclusive).
- */
-int bstrchrp (const_bstring b, int c, int pos) {
-unsigned char * p;
-
- if (b == NULL || b->data == NULL || b->slen <= pos || pos < 0) return BSTR_ERR;
- p = (unsigned char *) bstr__memchr ((b->data + pos), (unsigned char) c, (b->slen - pos));
- if (p) return (int) (p - b->data);
- return BSTR_ERR;
-}
-
-/* int bstrrchrp (const_bstring b, int c, int pos)
- *
- * Search for the character c in b backwards from the position pos in string
- * (inclusive).
- */
-int bstrrchrp (const_bstring b, int c, int pos) {
-int i;
-
- if (b == NULL || b->data == NULL || b->slen <= pos || pos < 0) return BSTR_ERR;
- for (i=pos; i >= 0; i--) {
- if (b->data[i] == (unsigned char) c) return i;
- }
- return BSTR_ERR;
-}
-
-#if !defined (BSTRLIB_AGGRESSIVE_MEMORY_FOR_SPEED_TRADEOFF)
-#define LONG_LOG_BITS_QTY (3)
-#define LONG_BITS_QTY (1 << LONG_LOG_BITS_QTY)
-#define LONG_TYPE unsigned char
-
-#define CFCLEN ((1 << CHAR_BIT) / LONG_BITS_QTY)
-struct charField { LONG_TYPE content[CFCLEN]; };
-#define testInCharField(cf,c) ((cf)->content[(c) >> LONG_LOG_BITS_QTY] & (((long)1) << ((c) & (LONG_BITS_QTY-1))))
-#define setInCharField(cf,idx) { \
- unsigned int c = (unsigned int) (idx); \
- (cf)->content[c >> LONG_LOG_BITS_QTY] |= (LONG_TYPE) (1ul << (c & (LONG_BITS_QTY-1))); \
-}
-
-#else
-
-#define CFCLEN (1 << CHAR_BIT)
-struct charField { unsigned char content[CFCLEN]; };
-#define testInCharField(cf,c) ((cf)->content[(unsigned char) (c)])
-#define setInCharField(cf,idx) (cf)->content[(unsigned int) (idx)] = ~0
-
-#endif
-
-/* Convert a bstring to charField */
-static int buildCharField (struct charField * cf, const_bstring b) {
-int i;
- if (b == NULL || b->data == NULL || b->slen <= 0) return BSTR_ERR;
- memset ((void *) cf->content, 0, sizeof (struct charField));
- for (i=0; i < b->slen; i++) {
- setInCharField (cf, b->data[i]);
- }
- return BSTR_OK;
-}
-
-static void invertCharField (struct charField * cf) {
-int i;
- for (i=0; i < CFCLEN; i++) cf->content[i] = ~cf->content[i];
-}
-
-/* Inner engine for binchr */
-static int binchrCF (const unsigned char * data, int len, int pos, const struct charField * cf) {
-int i;
- for (i=pos; i < len; i++) {
- unsigned char c = (unsigned char) data[i];
- if (testInCharField (cf, c)) return i;
- }
- return BSTR_ERR;
-}
-
-/* int binchr (const_bstring b0, int pos, const_bstring b1);
- *
- * Search for the first position in b0 starting from pos or after, in which
- * one of the characters in b1 is found and return it. If such a position
- * does not exist in b0, then BSTR_ERR is returned.
- */
-int binchr (const_bstring b0, int pos, const_bstring b1) {
-struct charField chrs;
- if (pos < 0 || b0 == NULL || b0->data == NULL ||
- b0->slen <= pos) return BSTR_ERR;
- if (1 == b1->slen) return bstrchrp (b0, b1->data[0], pos);
- if (0 > buildCharField (&chrs, b1)) return BSTR_ERR;
- return binchrCF (b0->data, b0->slen, pos, &chrs);
-}
-
-/* Inner engine for binchrr */
-static int binchrrCF (const unsigned char * data, int pos, const struct charField * cf) {
-int i;
- for (i=pos; i >= 0; i--) {
- unsigned int c = (unsigned int) data[i];
- if (testInCharField (cf, c)) return i;
- }
- return BSTR_ERR;
-}
-
-/* int binchrr (const_bstring b0, int pos, const_bstring b1);
- *
- * Search for the last position in b0 no greater than pos, in which one of
- * the characters in b1 is found and return it. If such a position does not
- * exist in b0, then BSTR_ERR is returned.
- */
-int binchrr (const_bstring b0, int pos, const_bstring b1) {
-struct charField chrs;
- if (pos < 0 || b0 == NULL || b0->data == NULL || b1 == NULL ||
- b0->slen < pos) return BSTR_ERR;
- if (pos == b0->slen) pos--;
- if (1 == b1->slen) return bstrrchrp (b0, b1->data[0], pos);
- if (0 > buildCharField (&chrs, b1)) return BSTR_ERR;
- return binchrrCF (b0->data, pos, &chrs);
-}
-
-/* int bninchr (const_bstring b0, int pos, const_bstring b1);
- *
- * Search for the first position in b0 starting from pos or after, in which
- * none of the characters in b1 is found and return it. If such a position
- * does not exist in b0, then BSTR_ERR is returned.
- */
-int bninchr (const_bstring b0, int pos, const_bstring b1) {
-struct charField chrs;
- if (pos < 0 || b0 == NULL || b0->data == NULL ||
- b0->slen <= pos) return BSTR_ERR;
- if (buildCharField (&chrs, b1) < 0) return BSTR_ERR;
- invertCharField (&chrs);
- return binchrCF (b0->data, b0->slen, pos, &chrs);
-}
-
-/* int bninchrr (const_bstring b0, int pos, const_bstring b1);
- *
- * Search for the last position in b0 no greater than pos, in which none of
- * the characters in b1 is found and return it. If such a position does not
- * exist in b0, then BSTR_ERR is returned.
- */
-int bninchrr (const_bstring b0, int pos, const_bstring b1) {
-struct charField chrs;
- if (pos < 0 || b0 == NULL || b0->data == NULL ||
- b0->slen < pos) return BSTR_ERR;
- if (pos == b0->slen) pos--;
- if (buildCharField (&chrs, b1) < 0) return BSTR_ERR;
- invertCharField (&chrs);
- return binchrrCF (b0->data, pos, &chrs);
-}
-
-/* int bsetstr (bstring b0, int pos, bstring b1, unsigned char fill)
- *
- * Overwrite the string b0 starting at position pos with the string b1. If
- * the position pos is past the end of b0, then the character "fill" is
- * appended as necessary to make up the gap between the end of b0 and pos.
- * If b1 is NULL, it behaves as if it were a 0-length string.
- */
-int bsetstr (bstring b0, int pos, const_bstring b1, unsigned char fill) {
-int d, newlen;
-ptrdiff_t pd;
-bstring aux = (bstring) b1;
-
- if (pos < 0 || b0 == NULL || b0->slen < 0 || NULL == b0->data ||
- b0->mlen < b0->slen || b0->mlen <= 0) return BSTR_ERR;
- if (b1 != NULL && (b1->slen < 0 || b1->data == NULL)) return BSTR_ERR;
-
- d = pos;
-
- /* Aliasing case */
- if (NULL != aux) {
- if ((pd = (ptrdiff_t) (b1->data - b0->data)) >= 0 && pd < (ptrdiff_t) b0->mlen) {
- if (NULL == (aux = bstrcpy (b1))) return BSTR_ERR;
- }
- d += aux->slen;
- }
-
- /* Increase memory size if necessary */
- if (balloc (b0, d + 1) != BSTR_OK) {
- if (aux != b1) bdestroy (aux);
- return BSTR_ERR;
- }
-
- newlen = b0->slen;
-
- /* Fill in "fill" character as necessary */
- if (pos > newlen) {
- bstr__memset (b0->data + b0->slen, (int) fill, (size_t) (pos - b0->slen));
- newlen = pos;
- }
-
- /* Copy b1 to position pos in b0. */
- if (aux != NULL) {
- bBlockCopy ((char *) (b0->data + pos), (char *) aux->data, aux->slen);
- if (aux != b1) bdestroy (aux);
- }
-
- /* Indicate the potentially increased size of b0 */
- if (d > newlen) newlen = d;
-
- b0->slen = newlen;
- b0->data[newlen] = (unsigned char) '\0';
-
- return BSTR_OK;
-}
-
-/* int binsert (bstring b1, int pos, bstring b2, unsigned char fill)
- *
- * Inserts the string b2 into b1 at position pos. If the position pos is
- * past the end of b1, then the character "fill" is appended as necessary to
- * make up the gap between the end of b1 and pos. Unlike bsetstr, binsert
- * does not allow b2 to be NULL.
- */
-int binsert (bstring b1, int pos, const_bstring b2, unsigned char fill) {
-int d, l;
-ptrdiff_t pd;
-bstring aux = (bstring) b2;
-
- if (pos < 0 || b1 == NULL || b2 == NULL || b1->slen < 0 ||
- b2->slen < 0 || b1->mlen < b1->slen || b1->mlen <= 0) return BSTR_ERR;
-
- /* Aliasing case */
- if ((pd = (ptrdiff_t) (b2->data - b1->data)) >= 0 && pd < (ptrdiff_t) b1->mlen) {
- if (NULL == (aux = bstrcpy (b2))) return BSTR_ERR;
- }
-
- /* Compute the two possible end pointers */
- d = b1->slen + aux->slen;
- l = pos + aux->slen;
- if ((d|l) < 0) return BSTR_ERR;
-
- if (l > d) {
- /* Inserting past the end of the string */
- if (balloc (b1, l + 1) != BSTR_OK) {
- if (aux != b2) bdestroy (aux);
- return BSTR_ERR;
- }
- bstr__memset (b1->data + b1->slen, (int) fill, (size_t) (pos - b1->slen));
- b1->slen = l;
- } else {
- /* Inserting in the middle of the string */
- if (balloc (b1, d + 1) != BSTR_OK) {
- if (aux != b2) bdestroy (aux);
- return BSTR_ERR;
- }
- bBlockCopy (b1->data + l, b1->data + pos, d - l);
- b1->slen = d;
- }
- bBlockCopy (b1->data + pos, aux->data, aux->slen);
- b1->data[b1->slen] = (unsigned char) '\0';
- if (aux != b2) bdestroy (aux);
- return BSTR_OK;
-}
-
-/* int breplace (bstring b1, int pos, int len, bstring b2,
- * unsigned char fill)
- *
- * Replace a section of a string from pos for a length len with the string b2.
- * fill is used is pos > b1->slen.
- */
-int breplace (bstring b1, int pos, int len, const_bstring b2,
- unsigned char fill) {
-int pl, ret;
-ptrdiff_t pd;
-bstring aux = (bstring) b2;
-
- if (pos < 0 || len < 0 || (pl = pos + len) < 0 || b1 == NULL ||
- b2 == NULL || b1->data == NULL || b2->data == NULL ||
- b1->slen < 0 || b2->slen < 0 || b1->mlen < b1->slen ||
- b1->mlen <= 0) return BSTR_ERR;
-
- /* Straddles the end? */
- if (pl >= b1->slen) {
- if ((ret = bsetstr (b1, pos, b2, fill)) < 0) return ret;
- if (pos + b2->slen < b1->slen) {
- b1->slen = pos + b2->slen;
- b1->data[b1->slen] = (unsigned char) '\0';
- }
- return ret;
- }
-
- /* Aliasing case */
- if ((pd = (ptrdiff_t) (b2->data - b1->data)) >= 0 && pd < (ptrdiff_t) b1->slen) {
- if (NULL == (aux = bstrcpy (b2))) return BSTR_ERR;
- }
-
- if (aux->slen > len) {
- if (balloc (b1, b1->slen + aux->slen - len) != BSTR_OK) {
- if (aux != b2) bdestroy (aux);
- return BSTR_ERR;
- }
- }
-
- if (aux->slen != len) bstr__memmove (b1->data + pos + aux->slen, b1->data + pos + len, b1->slen - (pos + len));
- bstr__memcpy (b1->data + pos, aux->data, aux->slen);
- b1->slen += aux->slen - len;
- b1->data[b1->slen] = (unsigned char) '\0';
- if (aux != b2) bdestroy (aux);
- return BSTR_OK;
-}
-
-/*
- * findreplaceengine is used to implement bfindreplace and
- * bfindreplacecaseless. It works by breaking the three cases of
- * expansion, reduction and replacement, and solving each of these
- * in the most efficient way possible.
- */
-
-typedef int (*instr_fnptr) (const_bstring s1, int pos, const_bstring s2);
-
-#define INITIAL_STATIC_FIND_INDEX_COUNT 32
-
-static int findreplaceengine (bstring b, const_bstring find, const_bstring repl, int pos, instr_fnptr instr) {
-int i, ret, slen, mlen, delta, acc;
-int * d;
-int static_d[INITIAL_STATIC_FIND_INDEX_COUNT+1]; /* This +1 is unnecessary, but it shuts up LINT. */
-ptrdiff_t pd;
-bstring auxf = (bstring) find;
-bstring auxr = (bstring) repl;
-
- if (b == NULL || b->data == NULL || find == NULL ||
- find->data == NULL || repl == NULL || repl->data == NULL ||
- pos < 0 || find->slen <= 0 || b->mlen < 0 || b->slen > b->mlen ||
- b->mlen <= 0 || b->slen < 0 || repl->slen < 0) return BSTR_ERR;
- if (pos > b->slen - find->slen) return BSTR_OK;
-
- /* Alias with find string */
- pd = (ptrdiff_t) (find->data - b->data);
- if ((ptrdiff_t) (pos - find->slen) < pd && pd < (ptrdiff_t) b->slen) {
- if (NULL == (auxf = bstrcpy (find))) return BSTR_ERR;
- }
-
- /* Alias with repl string */
- pd = (ptrdiff_t) (repl->data - b->data);
- if ((ptrdiff_t) (pos - repl->slen) < pd && pd < (ptrdiff_t) b->slen) {
- if (NULL == (auxr = bstrcpy (repl))) {
- if (auxf != find) bdestroy (auxf);
- return BSTR_ERR;
- }
- }
-
- delta = auxf->slen - auxr->slen;
-
- /* in-place replacement since find and replace strings are of equal
- length */
- if (delta == 0) {
- while ((pos = instr (b, pos, auxf)) >= 0) {
- bstr__memcpy (b->data + pos, auxr->data, auxr->slen);
- pos += auxf->slen;
- }
- if (auxf != find) bdestroy (auxf);
- if (auxr != repl) bdestroy (auxr);
- return BSTR_OK;
- }
-
- /* shrinking replacement since auxf->slen > auxr->slen */
- if (delta > 0) {
- acc = 0;
-
- while ((i = instr (b, pos, auxf)) >= 0) {
- if (acc && i > pos)
- bstr__memmove (b->data + pos - acc, b->data + pos, i - pos);
- if (auxr->slen)
- bstr__memcpy (b->data + i - acc, auxr->data, auxr->slen);
- acc += delta;
- pos = i + auxf->slen;
- }
-
- if (acc) {
- i = b->slen;
- if (i > pos)
- bstr__memmove (b->data + pos - acc, b->data + pos, i - pos);
- b->slen -= acc;
- b->data[b->slen] = (unsigned char) '\0';
- }
-
- if (auxf != find) bdestroy (auxf);
- if (auxr != repl) bdestroy (auxr);
- return BSTR_OK;
- }
-
- /* expanding replacement since find->slen < repl->slen. Its a lot
- more complicated. This works by first finding all the matches and
- storing them to a growable array, then doing at most one resize of
- the destination bstring and then performing the direct memory transfers
- of the string segment pieces to form the final result. The growable
- array of matches uses a deferred doubling reallocing strategy. What
- this means is that it starts as a reasonably fixed sized auto array in
- the hopes that many if not most cases will never need to grow this
- array. But it switches as soon as the bounds of the array will be
- exceeded. An extra find result is always appended to this array that
- corresponds to the end of the destination string, so slen is checked
- against mlen - 1 rather than mlen before resizing.
- */
-
- mlen = INITIAL_STATIC_FIND_INDEX_COUNT;
- d = (int *) static_d; /* Avoid malloc for trivial/initial cases */
- acc = slen = 0;
-
- while ((pos = instr (b, pos, auxf)) >= 0) {
- if (slen >= mlen - 1) {
- int sl, *t;
-
- mlen += mlen;
- sl = sizeof (int *) * mlen;
- if (static_d == d) d = NULL; /* static_d cannot be realloced */
- if (mlen <= 0 || sl < mlen || NULL == (t = (int *) bstr__realloc (d, sl))) {
- ret = BSTR_ERR;
- goto done;
- }
- if (NULL == d) bstr__memcpy (t, static_d, sizeof (static_d));
- d = t;
- }
- d[slen] = pos;
- slen++;
- acc -= delta;
- pos += auxf->slen;
- if (pos < 0 || acc < 0) {
- ret = BSTR_ERR;
- goto done;
- }
- }
-
- /* slen <= INITIAL_STATIC_INDEX_COUNT-1 or mlen-1 here. */
- d[slen] = b->slen;
-
- if (BSTR_OK == (ret = balloc (b, b->slen + acc + 1))) {
- b->slen += acc;
- for (i = slen-1; i >= 0; i--) {
- int s, l;
- s = d[i] + auxf->slen;
- l = d[i+1] - s; /* d[slen] may be accessed here. */
- if (l) {
- bstr__memmove (b->data + s + acc, b->data + s, l);
- }
- if (auxr->slen) {
- bstr__memmove (b->data + s + acc - auxr->slen,
- auxr->data, auxr->slen);
- }
- acc += delta;
- }
- b->data[b->slen] = (unsigned char) '\0';
- }
-
- done:;
- if (static_d == d) d = NULL;
- bstr__free (d);
- if (auxf != find) bdestroy (auxf);
- if (auxr != repl) bdestroy (auxr);
- return ret;
-}
-
-/* int bfindreplace (bstring b, const_bstring find, const_bstring repl,
- * int pos)
- *
- * Replace all occurrences of a find string with a replace string after a
- * given point in a bstring.
- */
-int bfindreplace (bstring b, const_bstring find, const_bstring repl, int pos) {
- return findreplaceengine (b, find, repl, pos, binstr);
-}
-
-/* int bfindreplacecaseless (bstring b, const_bstring find, const_bstring repl,
- * int pos)
- *
- * Replace all occurrences of a find string, ignoring case, with a replace
- * string after a given point in a bstring.
- */
-int bfindreplacecaseless (bstring b, const_bstring find, const_bstring repl, int pos) {
- return findreplaceengine (b, find, repl, pos, binstrcaseless);
-}
-
-/* int binsertch (bstring b, int pos, int len, unsigned char fill)
- *
- * Inserts the character fill repeatedly into b at position pos for a
- * length len. If the position pos is past the end of b, then the
- * character "fill" is appended as necessary to make up the gap between the
- * end of b and the position pos + len.
- */
-int binsertch (bstring b, int pos, int len, unsigned char fill) {
-int d, l, i;
-
- if (pos < 0 || b == NULL || b->slen < 0 || b->mlen < b->slen ||
- b->mlen <= 0 || len < 0) return BSTR_ERR;
-
- /* Compute the two possible end pointers */
- d = b->slen + len;
- l = pos + len;
- if ((d|l) < 0) return BSTR_ERR;
-
- if (l > d) {
- /* Inserting past the end of the string */
- if (balloc (b, l + 1) != BSTR_OK) return BSTR_ERR;
- pos = b->slen;
- b->slen = l;
- } else {
- /* Inserting in the middle of the string */
- if (balloc (b, d + 1) != BSTR_OK) return BSTR_ERR;
- for (i = d - 1; i >= l; i--) {
- b->data[i] = b->data[i - len];
- }
- b->slen = d;
- }
-
- for (i=pos; i < l; i++) b->data[i] = fill;
- b->data[b->slen] = (unsigned char) '\0';
- return BSTR_OK;
-}
-
-/* int bpattern (bstring b, int len)
- *
- * Replicate the bstring, b in place, end to end repeatedly until it
- * surpasses len characters, then chop the result to exactly len characters.
- * This function operates in-place. The function will return with BSTR_ERR
- * if b is NULL or of length 0, otherwise BSTR_OK is returned.
- */
-int bpattern (bstring b, int len) {
-int i, d;
-
- d = blength (b);
- if (d <= 0 || len < 0 || balloc (b, len + 1) != BSTR_OK) return BSTR_ERR;
- if (len > 0) {
- if (d == 1) return bsetstr (b, len, NULL, b->data[0]);
- for (i = d; i < len; i++) b->data[i] = b->data[i - d];
- }
- b->data[len] = (unsigned char) '\0';
- b->slen = len;
- return BSTR_OK;
-}
-
-#define BS_BUFF_SZ (1024)
-
-/* int breada (bstring b, bNread readPtr, void * parm)
- *
- * Use a finite buffer fread-like function readPtr to concatenate to the
- * bstring b the entire contents of file-like source data in a roughly
- * efficient way.
- */
-int breada (bstring b, bNread readPtr, void * parm) {
-int i, l, n;
-
- if (b == NULL || b->mlen <= 0 || b->slen < 0 || b->mlen < b->slen ||
- b->mlen <= 0 || readPtr == NULL) return BSTR_ERR;
-
- i = b->slen;
- for (n=i+16; ; n += ((n < BS_BUFF_SZ) ? n : BS_BUFF_SZ)) {
- if (BSTR_OK != balloc (b, n + 1)) return BSTR_ERR;
- l = (int) readPtr ((void *) (b->data + i), 1, n - i, parm);
- i += l;
- b->slen = i;
- if (i < n) break;
- }
-
- b->data[i] = (unsigned char) '\0';
- return BSTR_OK;
-}
-
-/* bstring bread (bNread readPtr, void * parm)
- *
- * Use a finite buffer fread-like function readPtr to create a bstring
- * filled with the entire contents of file-like source data in a roughly
- * efficient way.
- */
-bstring bread (bNread readPtr, void * parm) {
-bstring buff;
-
- if (0 > breada (buff = bfromcstr (""), readPtr, parm)) {
- bdestroy (buff);
- return NULL;
- }
- return buff;
-}
-
-/* int bassigngets (bstring b, bNgetc getcPtr, void * parm, char terminator)
- *
- * Use an fgetc-like single character stream reading function (getcPtr) to
- * obtain a sequence of characters which are concatenated to the end of the
- * bstring b. The stream read is terminated by the passed in terminator
- * parameter.
- *
- * If getcPtr returns with a negative number, or the terminator character
- * (which is appended) is read, then the stream reading is halted and the
- * function returns with a partial result in b. If there is an empty partial
- * result, 1 is returned. If no characters are read, or there is some other
- * detectable error, BSTR_ERR is returned.
- */
-int bassigngets (bstring b, bNgetc getcPtr, void * parm, char terminator) {
-int c, d, e;
-
- if (b == NULL || b->mlen <= 0 || b->slen < 0 || b->mlen < b->slen ||
- b->mlen <= 0 || getcPtr == NULL) return BSTR_ERR;
- d = 0;
- e = b->mlen - 2;
-
- while ((c = getcPtr (parm)) >= 0) {
- if (d > e) {
- b->slen = d;
- if (balloc (b, d + 2) != BSTR_OK) return BSTR_ERR;
- e = b->mlen - 2;
- }
- b->data[d] = (unsigned char) c;
- d++;
- if (c == terminator) break;
- }
-
- b->data[d] = (unsigned char) '\0';
- b->slen = d;
-
- return d == 0 && c < 0;
-}
-
-/* int bgetsa (bstring b, bNgetc getcPtr, void * parm, char terminator)
- *
- * Use an fgetc-like single character stream reading function (getcPtr) to
- * obtain a sequence of characters which are concatenated to the end of the
- * bstring b. The stream read is terminated by the passed in terminator
- * parameter.
- *
- * If getcPtr returns with a negative number, or the terminator character
- * (which is appended) is read, then the stream reading is halted and the
- * function returns with a partial result concatentated to b. If there is
- * an empty partial result, 1 is returned. If no characters are read, or
- * there is some other detectable error, BSTR_ERR is returned.
- */
-int bgetsa (bstring b, bNgetc getcPtr, void * parm, char terminator) {
-int c, d, e;
-
- if (b == NULL || b->mlen <= 0 || b->slen < 0 || b->mlen < b->slen ||
- b->mlen <= 0 || getcPtr == NULL) return BSTR_ERR;
- d = b->slen;
- e = b->mlen - 2;
-
- while ((c = getcPtr (parm)) >= 0) {
- if (d > e) {
- b->slen = d;
- if (balloc (b, d + 2) != BSTR_OK) return BSTR_ERR;
- e = b->mlen - 2;
- }
- b->data[d] = (unsigned char) c;
- d++;
- if (c == terminator) break;
- }
-
- b->data[d] = (unsigned char) '\0';
- b->slen = d;
-
- return d == 0 && c < 0;
-}
-
-/* bstring bgets (bNgetc getcPtr, void * parm, char terminator)
- *
- * Use an fgetc-like single character stream reading function (getcPtr) to
- * obtain a sequence of characters which are concatenated into a bstring.
- * The stream read is terminated by the passed in terminator function.
- *
- * If getcPtr returns with a negative number, or the terminator character
- * (which is appended) is read, then the stream reading is halted and the
- * result obtained thus far is returned. If no characters are read, or
- * there is some other detectable error, NULL is returned.
- */
-bstring bgets (bNgetc getcPtr, void * parm, char terminator) {
-bstring buff;
-
- if (0 > bgetsa (buff = bfromcstr (""), getcPtr, parm, terminator) || 0 >= buff->slen) {
- bdestroy (buff);
- buff = NULL;
- }
- return buff;
-}
-
-struct bStream {
- bstring buff; /* Buffer for over-reads */
- void * parm; /* The stream handle for core stream */
- bNread readFnPtr; /* fread compatible fnptr for core stream */
- int isEOF; /* track file's EOF state */
- int maxBuffSz;
-};
-
-/* struct bStream * bsopen (bNread readPtr, void * parm)
- *
- * Wrap a given open stream (described by a fread compatible function
- * pointer and stream handle) into an open bStream suitable for the bstring
- * library streaming functions.
- */
-struct bStream * bsopen (bNread readPtr, void * parm) {
-struct bStream * s;
-
- if (readPtr == NULL) return NULL;
- s = (struct bStream *) bstr__alloc (sizeof (struct bStream));
- if (s == NULL) return NULL;
- s->parm = parm;
- s->buff = bfromcstr ("");
- s->readFnPtr = readPtr;
- s->maxBuffSz = BS_BUFF_SZ;
- s->isEOF = 0;
- return s;
-}
-
-/* int bsbufflength (struct bStream * s, int sz)
- *
- * Set the length of the buffer used by the bStream. If sz is zero, the
- * length is not set. This function returns with the previous length.
- */
-int bsbufflength (struct bStream * s, int sz) {
-int oldSz;
- if (s == NULL || sz < 0) return BSTR_ERR;
- oldSz = s->maxBuffSz;
- if (sz > 0) s->maxBuffSz = sz;
- return oldSz;
-}
-
-int bseof (const struct bStream * s) {
- if (s == NULL || s->readFnPtr == NULL) return BSTR_ERR;
- return s->isEOF && (s->buff->slen == 0);
-}
-
-/* void * bsclose (struct bStream * s)
- *
- * Close the bStream, and return the handle to the stream that was originally
- * used to open the given stream.
- */
-void * bsclose (struct bStream * s) {
-void * parm;
- if (s == NULL) return NULL;
- s->readFnPtr = NULL;
- if (s->buff) bdestroy (s->buff);
- s->buff = NULL;
- parm = s->parm;
- s->parm = NULL;
- s->isEOF = 1;
- bstr__free (s);
- return parm;
-}
-
-/* int bsreadlna (bstring r, struct bStream * s, char terminator)
- *
- * Read a bstring terminated by the terminator character or the end of the
- * stream from the bStream (s) and return it into the parameter r. This
- * function may read additional characters from the core stream that are not
- * returned, but will be retained for subsequent read operations.
- */
-int bsreadlna (bstring r, struct bStream * s, char terminator) {
-int i, l, ret, rlo;
-char * b;
-struct tagbstring x;
-
- if (s == NULL || s->buff == NULL || r == NULL || r->mlen <= 0 ||
- r->slen < 0 || r->mlen < r->slen) return BSTR_ERR;
- l = s->buff->slen;
- if (BSTR_OK != balloc (s->buff, s->maxBuffSz + 1)) return BSTR_ERR;
- b = (char *) s->buff->data;
- x.data = (unsigned char *) b;
-
- /* First check if the current buffer holds the terminator */
- b[l] = terminator; /* Set sentinel */
- for (i=0; b[i] != terminator; i++) ;
- if (i < l) {
- x.slen = i + 1;
- ret = bconcat (r, &x);
- s->buff->slen = l;
- if (BSTR_OK == ret) bdelete (s->buff, 0, i + 1);
- return BSTR_OK;
- }
-
- rlo = r->slen;
-
- /* If not then just concatenate the entire buffer to the output */
- x.slen = l;
- if (BSTR_OK != bconcat (r, &x)) return BSTR_ERR;
-
- /* Perform direct in-place reads into the destination to allow for
- the minimum of data-copies */
- for (;;) {
- if (BSTR_OK != balloc (r, r->slen + s->maxBuffSz + 1)) return BSTR_ERR;
- b = (char *) (r->data + r->slen);
- l = (int) s->readFnPtr (b, 1, s->maxBuffSz, s->parm);
- if (l <= 0) {
- r->data[r->slen] = (unsigned char) '\0';
- s->buff->slen = 0;
- s->isEOF = 1;
- /* If nothing was read return with an error message */
- return BSTR_ERR & -(r->slen == rlo);
- }
- b[l] = terminator; /* Set sentinel */
- for (i=0; b[i] != terminator; i++) ;
- if (i < l) break;
- r->slen += l;
- }
-
- /* Terminator found, push over-read back to buffer */
- i++;
- r->slen += i;
- s->buff->slen = l - i;
- bstr__memcpy (s->buff->data, b + i, l - i);
- r->data[r->slen] = (unsigned char) '\0';
- return BSTR_OK;
-}
-
-/* int bsreadlnsa (bstring r, struct bStream * s, bstring term)
- *
- * Read a bstring terminated by any character in the term string or the end
- * of the stream from the bStream (s) and return it into the parameter r.
- * This function may read additional characters from the core stream that
- * are not returned, but will be retained for subsequent read operations.
- */
-int bsreadlnsa (bstring r, struct bStream * s, const_bstring term) {
-int i, l, ret, rlo;
-unsigned char * b;
-struct tagbstring x;
-struct charField cf;
-
- if (s == NULL || s->buff == NULL || r == NULL || term == NULL ||
- term->data == NULL || r->mlen <= 0 || r->slen < 0 ||
- r->mlen < r->slen) return BSTR_ERR;
- if (term->slen == 1) return bsreadlna (r, s, term->data[0]);
- if (term->slen < 1 || buildCharField (&cf, term)) return BSTR_ERR;
-
- l = s->buff->slen;
- if (BSTR_OK != balloc (s->buff, s->maxBuffSz + 1)) return BSTR_ERR;
- b = (unsigned char *) s->buff->data;
- x.data = b;
-
- /* First check if the current buffer holds the terminator */
- b[l] = term->data[0]; /* Set sentinel */
- for (i=0; !testInCharField (&cf, b[i]); i++) ;
- if (i < l) {
- x.slen = i + 1;
- ret = bconcat (r, &x);
- s->buff->slen = l;
- if (BSTR_OK == ret) bdelete (s->buff, 0, i + 1);
- return BSTR_OK;
- }
-
- rlo = r->slen;
-
- /* If not then just concatenate the entire buffer to the output */
- x.slen = l;
- if (BSTR_OK != bconcat (r, &x)) return BSTR_ERR;
-
- /* Perform direct in-place reads into the destination to allow for
- the minimum of data-copies */
- for (;;) {
- if (BSTR_OK != balloc (r, r->slen + s->maxBuffSz + 1)) return BSTR_ERR;
- b = (unsigned char *) (r->data + r->slen);
- l = (int) s->readFnPtr (b, 1, s->maxBuffSz, s->parm);
- if (l <= 0) {
- r->data[r->slen] = (unsigned char) '\0';
- s->buff->slen = 0;
- s->isEOF = 1;
- /* If nothing was read return with an error message */
- return BSTR_ERR & -(r->slen == rlo);
- }
-
- b[l] = term->data[0]; /* Set sentinel */
- for (i=0; !testInCharField (&cf, b[i]); i++) ;
- if (i < l) break;
- r->slen += l;
- }
-
- /* Terminator found, push over-read back to buffer */
- i++;
- r->slen += i;
- s->buff->slen = l - i;
- bstr__memcpy (s->buff->data, b + i, l - i);
- r->data[r->slen] = (unsigned char) '\0';
- return BSTR_OK;
-}
-
-/* int bsreada (bstring r, struct bStream * s, int n)
- *
- * Read a bstring of length n (or, if it is fewer, as many bytes as is
- * remaining) from the bStream. This function may read additional
- * characters from the core stream that are not returned, but will be
- * retained for subsequent read operations. This function will not read
- * additional characters from the core stream beyond virtual stream pointer.
- */
-int bsreada (bstring r, struct bStream * s, int n) {
-int l, ret, orslen;
-char * b;
-struct tagbstring x;
-
- if (s == NULL || s->buff == NULL || r == NULL || r->mlen <= 0
- || r->slen < 0 || r->mlen < r->slen || n <= 0) return BSTR_ERR;
-
- n += r->slen;
- if (n <= 0) return BSTR_ERR;
-
- l = s->buff->slen;
-
- orslen = r->slen;
-
- if (0 == l) {
- if (s->isEOF) return BSTR_ERR;
- if (r->mlen > n) {
- l = (int) s->readFnPtr (r->data + r->slen, 1, n - r->slen, s->parm);
- if (0 >= l || l > n - r->slen) {
- s->isEOF = 1;
- return BSTR_ERR;
- }
- r->slen += l;
- r->data[r->slen] = (unsigned char) '\0';
- return 0;
- }
- }
-
- if (BSTR_OK != balloc (s->buff, s->maxBuffSz + 1)) return BSTR_ERR;
- b = (char *) s->buff->data;
- x.data = (unsigned char *) b;
-
- do {
- if (l + r->slen >= n) {
- x.slen = n - r->slen;
- ret = bconcat (r, &x);
- s->buff->slen = l;
- if (BSTR_OK == ret) bdelete (s->buff, 0, x.slen);
- return BSTR_ERR & -(r->slen == orslen);
- }
-
- x.slen = l;
- if (BSTR_OK != bconcat (r, &x)) break;
-
- l = n - r->slen;
- if (l > s->maxBuffSz) l = s->maxBuffSz;
-
- l = (int) s->readFnPtr (b, 1, l, s->parm);
-
- } while (l > 0);
- if (l < 0) l = 0;
- if (l == 0) s->isEOF = 1;
- s->buff->slen = l;
- return BSTR_ERR & -(r->slen == orslen);
-}
-
-/* int bsreadln (bstring r, struct bStream * s, char terminator)
- *
- * Read a bstring terminated by the terminator character or the end of the
- * stream from the bStream (s) and return it into the parameter r. This
- * function may read additional characters from the core stream that are not
- * returned, but will be retained for subsequent read operations.
- */
-int bsreadln (bstring r, struct bStream * s, char terminator) {
- if (s == NULL || s->buff == NULL || r == NULL || r->mlen <= 0)
- return BSTR_ERR;
- if (BSTR_OK != balloc (s->buff, s->maxBuffSz + 1)) return BSTR_ERR;
- r->slen = 0;
- return bsreadlna (r, s, terminator);
-}
-
-/* int bsreadlns (bstring r, struct bStream * s, bstring term)
- *
- * Read a bstring terminated by any character in the term string or the end
- * of the stream from the bStream (s) and return it into the parameter r.
- * This function may read additional characters from the core stream that
- * are not returned, but will be retained for subsequent read operations.
- */
-int bsreadlns (bstring r, struct bStream * s, const_bstring term) {
- if (s == NULL || s->buff == NULL || r == NULL || term == NULL
- || term->data == NULL || r->mlen <= 0) return BSTR_ERR;
- if (term->slen == 1) return bsreadln (r, s, term->data[0]);
- if (term->slen < 1) return BSTR_ERR;
- if (BSTR_OK != balloc (s->buff, s->maxBuffSz + 1)) return BSTR_ERR;
- r->slen = 0;
- return bsreadlnsa (r, s, term);
-}
-
-/* int bsread (bstring r, struct bStream * s, int n)
- *
- * Read a bstring of length n (or, if it is fewer, as many bytes as is
- * remaining) from the bStream. This function may read additional
- * characters from the core stream that are not returned, but will be
- * retained for subsequent read operations. This function will not read
- * additional characters from the core stream beyond virtual stream pointer.
- */
-int bsread (bstring r, struct bStream * s, int n) {
- if (s == NULL || s->buff == NULL || r == NULL || r->mlen <= 0
- || n <= 0) return BSTR_ERR;
- if (BSTR_OK != balloc (s->buff, s->maxBuffSz + 1)) return BSTR_ERR;
- r->slen = 0;
- return bsreada (r, s, n);
-}
-
-/* int bsunread (struct bStream * s, const_bstring b)
- *
- * Insert a bstring into the bStream at the current position. These
- * characters will be read prior to those that actually come from the core
- * stream.
- */
-int bsunread (struct bStream * s, const_bstring b) {
- if (s == NULL || s->buff == NULL) return BSTR_ERR;
- return binsert (s->buff, 0, b, (unsigned char) '?');
-}
-
-/* int bspeek (bstring r, const struct bStream * s)
- *
- * Return the currently buffered characters from the bStream that will be
- * read prior to reads from the core stream.
- */
-int bspeek (bstring r, const struct bStream * s) {
- if (s == NULL || s->buff == NULL) return BSTR_ERR;
- return bassign (r, s->buff);
-}
-
-/* bstring bjoin (const struct bstrList * bl, const_bstring sep);
- *
- * Join the entries of a bstrList into one bstring by sequentially
- * concatenating them with the sep string in between. If there is an error
- * NULL is returned, otherwise a bstring with the correct result is returned.
- */
-bstring bjoin (const struct bstrList * bl, const_bstring sep) {
-bstring b;
-int i, c, v;
-
- if (bl == NULL || bl->qty < 0) return NULL;
- if (sep != NULL && (sep->slen < 0 || sep->data == NULL)) return NULL;
-
- for (i = 0, c = 1; i < bl->qty; i++) {
- v = bl->entry[i]->slen;
- if (v < 0) return NULL; /* Invalid input */
- c += v;
- if (c < 0) return NULL; /* Wrap around ?? */
- }
-
- if (sep != NULL) c += (bl->qty - 1) * sep->slen;
-
- b = (bstring) bstr__alloc (sizeof (struct tagbstring));
- if (NULL == b) return NULL; /* Out of memory */
- b->data = (unsigned char *) bstr__alloc (c);
- if (b->data == NULL) {
- bstr__free (b);
- return NULL;
- }
-
- b->mlen = c;
- b->slen = c-1;
-
- for (i = 0, c = 0; i < bl->qty; i++) {
- if (i > 0 && sep != NULL) {
- bstr__memcpy (b->data + c, sep->data, sep->slen);
- c += sep->slen;
- }
- v = bl->entry[i]->slen;
- bstr__memcpy (b->data + c, bl->entry[i]->data, v);
- c += v;
- }
- b->data[c] = (unsigned char) '\0';
- return b;
-}
-
-#define BSSSC_BUFF_LEN (256)
-
-/* int bssplitscb (struct bStream * s, const_bstring splitStr,
- * int (* cb) (void * parm, int ofs, const_bstring entry), void * parm)
- *
- * Iterate the set of disjoint sequential substrings read from a stream
- * divided by any of the characters in splitStr. An empty splitStr causes
- * the whole stream to be iterated once.
- *
- * Note: At the point of calling the cb function, the bStream pointer is
- * pointed exactly at the position right after having read the split
- * character. The cb function can act on the stream by causing the bStream
- * pointer to move, and bssplitscb will continue by starting the next split
- * at the position of the pointer after the return from cb.
- *
- * However, if the cb causes the bStream s to be destroyed then the cb must
- * return with a negative value, otherwise bssplitscb will continue in an
- * undefined manner.
- */
-int bssplitscb (struct bStream * s, const_bstring splitStr,
- int (* cb) (void * parm, int ofs, const_bstring entry), void * parm) {
-struct charField chrs;
-bstring buff;
-int i, p, ret;
-
- if (cb == NULL || s == NULL || s->readFnPtr == NULL
- || splitStr == NULL || splitStr->slen < 0) return BSTR_ERR;
-
- if (NULL == (buff = bfromcstr (""))) return BSTR_ERR;
-
- if (splitStr->slen == 0) {
- while (bsreada (buff, s, BSSSC_BUFF_LEN) >= 0) ;
- if ((ret = cb (parm, 0, buff)) > 0)
- ret = 0;
- } else {
- buildCharField (&chrs, splitStr);
- ret = p = i = 0;
- for (;;) {
- if (i >= buff->slen) {
- bsreada (buff, s, BSSSC_BUFF_LEN);
- if (i >= buff->slen) {
- if (0 < (ret = cb (parm, p, buff))) ret = 0;
- break;
- }
- }
- if (testInCharField (&chrs, buff->data[i])) {
- struct tagbstring t;
- unsigned char c;
-
- blk2tbstr (t, buff->data + i + 1, buff->slen - (i + 1));
- if ((ret = bsunread (s, &t)) < 0) break;
- buff->slen = i;
- c = buff->data[i];
- buff->data[i] = (unsigned char) '\0';
- if ((ret = cb (parm, p, buff)) < 0) break;
- buff->data[i] = c;
- buff->slen = 0;
- p += i + 1;
- i = -1;
- }
- i++;
- }
- }
-
- bdestroy (buff);
- return ret;
-}
-
-/* int bssplitstrcb (struct bStream * s, const_bstring splitStr,
- * int (* cb) (void * parm, int ofs, const_bstring entry), void * parm)
- *
- * Iterate the set of disjoint sequential substrings read from a stream
- * divided by the entire substring splitStr. An empty splitStr causes
- * each character of the stream to be iterated.
- *
- * Note: At the point of calling the cb function, the bStream pointer is
- * pointed exactly at the position right after having read the split
- * character. The cb function can act on the stream by causing the bStream
- * pointer to move, and bssplitscb will continue by starting the next split
- * at the position of the pointer after the return from cb.
- *
- * However, if the cb causes the bStream s to be destroyed then the cb must
- * return with a negative value, otherwise bssplitscb will continue in an
- * undefined manner.
- */
-int bssplitstrcb (struct bStream * s, const_bstring splitStr,
- int (* cb) (void * parm, int ofs, const_bstring entry), void * parm) {
-bstring buff;
-int i, p, ret;
-
- if (cb == NULL || s == NULL || s->readFnPtr == NULL
- || splitStr == NULL || splitStr->slen < 0) return BSTR_ERR;
-
- if (splitStr->slen == 1) return bssplitscb (s, splitStr, cb, parm);
-
- if (NULL == (buff = bfromcstr (""))) return BSTR_ERR;
-
- if (splitStr->slen == 0) {
- for (i=0; bsreada (buff, s, BSSSC_BUFF_LEN) >= 0; i++) {
- if ((ret = cb (parm, 0, buff)) < 0) {
- bdestroy (buff);
- return ret;
- }
- buff->slen = 0;
- }
- return BSTR_OK;
- } else {
- ret = p = i = 0;
- for (i=p=0;;) {
- if ((ret = binstr (buff, 0, splitStr)) >= 0) {
- struct tagbstring t;
- blk2tbstr (t, buff->data, ret);
- i = ret + splitStr->slen;
- if ((ret = cb (parm, p, &t)) < 0) break;
- p += i;
- bdelete (buff, 0, i);
- } else {
- bsreada (buff, s, BSSSC_BUFF_LEN);
- if (bseof (s)) {
- if ((ret = cb (parm, p, buff)) > 0) ret = 0;
- break;
- }
- }
- }
- }
-
- bdestroy (buff);
- return ret;
-}
-
-/* int bstrListCreate (void)
- *
- * Create a bstrList.
- */
-struct bstrList * bstrListCreate (void) {
-struct bstrList * sl = (struct bstrList *) bstr__alloc (sizeof (struct bstrList));
- if (sl) {
- sl->entry = (bstring *) bstr__alloc (1*sizeof (bstring));
- if (!sl->entry) {
- bstr__free (sl);
- sl = NULL;
- } else {
- sl->qty = 0;
- sl->mlen = 1;
- }
- }
- return sl;
-}
-
-/* int bstrListDestroy (struct bstrList * sl)
- *
- * Destroy a bstrList that has been created by bsplit, bsplits or bstrListCreate.
- */
-int bstrListDestroy (struct bstrList * sl) {
-int i;
- if (sl == NULL || sl->qty < 0) return BSTR_ERR;
- for (i=0; i < sl->qty; i++) {
- if (sl->entry[i]) {
- bdestroy (sl->entry[i]);
- sl->entry[i] = NULL;
- }
- }
- sl->qty = -1;
- sl->mlen = -1;
- bstr__free (sl->entry);
- sl->entry = NULL;
- bstr__free (sl);
- return BSTR_OK;
-}
-
-/* int bstrListAlloc (struct bstrList * sl, int msz)
- *
- * Ensure that there is memory for at least msz number of entries for the
- * list.
- */
-int bstrListAlloc (struct bstrList * sl, int msz) {
-bstring * l;
-int smsz;
-size_t nsz;
- if (!sl || msz <= 0 || !sl->entry || sl->qty < 0 || sl->mlen <= 0 || sl->qty > sl->mlen) return BSTR_ERR;
- if (sl->mlen >= msz) return BSTR_OK;
- smsz = snapUpSize (msz);
- nsz = ((size_t) smsz) * sizeof (bstring);
- if (nsz < (size_t) smsz) return BSTR_ERR;
- l = (bstring *) bstr__realloc (sl->entry, nsz);
- if (!l) {
- smsz = msz;
- nsz = ((size_t) smsz) * sizeof (bstring);
- l = (bstring *) bstr__realloc (sl->entry, nsz);
- if (!l) return BSTR_ERR;
- }
- sl->mlen = smsz;
- sl->entry = l;
- return BSTR_OK;
-}
-
-/* int bstrListAllocMin (struct bstrList * sl, int msz)
- *
- * Try to allocate the minimum amount of memory for the list to include at
- * least msz entries or sl->qty whichever is greater.
- */
-int bstrListAllocMin (struct bstrList * sl, int msz) {
-bstring * l;
-size_t nsz;
- if (!sl || msz <= 0 || !sl->entry || sl->qty < 0 || sl->mlen <= 0 || sl->qty > sl->mlen) return BSTR_ERR;
- if (msz < sl->qty) msz = sl->qty;
- if (sl->mlen == msz) return BSTR_OK;
- nsz = ((size_t) msz) * sizeof (bstring);
- if (nsz < (size_t) msz) return BSTR_ERR;
- l = (bstring *) bstr__realloc (sl->entry, nsz);
- if (!l) return BSTR_ERR;
- sl->mlen = msz;
- sl->entry = l;
- return BSTR_OK;
-}
-
-/* int bsplitcb (const_bstring str, unsigned char splitChar, int pos,
- * int (* cb) (void * parm, int ofs, int len), void * parm)
- *
- * Iterate the set of disjoint sequential substrings over str divided by the
- * character in splitChar.
- *
- * Note: Non-destructive modification of str from within the cb function
- * while performing this split is not undefined. bsplitcb behaves in
- * sequential lock step with calls to cb. I.e., after returning from a cb
- * that return a non-negative integer, bsplitcb continues from the position
- * 1 character after the last detected split character and it will halt
- * immediately if the length of str falls below this point. However, if the
- * cb function destroys str, then it *must* return with a negative value,
- * otherwise bsplitcb will continue in an undefined manner.
- */
-int bsplitcb (const_bstring str, unsigned char splitChar, int pos,
- int (* cb) (void * parm, int ofs, int len), void * parm) {
-int i, p, ret;
-
- if (cb == NULL || str == NULL || pos < 0 || pos > str->slen)
- return BSTR_ERR;
-
- p = pos;
- do {
- for (i=p; i < str->slen; i++) {
- if (str->data[i] == splitChar) break;
- }
- if ((ret = cb (parm, p, i - p)) < 0) return ret;
- p = i + 1;
- } while (p <= str->slen);
- return BSTR_OK;
-}
-
-/* int bsplitscb (const_bstring str, const_bstring splitStr, int pos,
- * int (* cb) (void * parm, int ofs, int len), void * parm)
- *
- * Iterate the set of disjoint sequential substrings over str divided by any
- * of the characters in splitStr. An empty splitStr causes the whole str to
- * be iterated once.
- *
- * Note: Non-destructive modification of str from within the cb function
- * while performing this split is not undefined. bsplitscb behaves in
- * sequential lock step with calls to cb. I.e., after returning from a cb
- * that return a non-negative integer, bsplitscb continues from the position
- * 1 character after the last detected split character and it will halt
- * immediately if the length of str falls below this point. However, if the
- * cb function destroys str, then it *must* return with a negative value,
- * otherwise bsplitscb will continue in an undefined manner.
- */
-int bsplitscb (const_bstring str, const_bstring splitStr, int pos,
- int (* cb) (void * parm, int ofs, int len), void * parm) {
-struct charField chrs;
-int i, p, ret;
-
- if (cb == NULL || str == NULL || pos < 0 || pos > str->slen
- || splitStr == NULL || splitStr->slen < 0) return BSTR_ERR;
- if (splitStr->slen == 0) {
- if ((ret = cb (parm, 0, str->slen)) > 0) ret = 0;
- return ret;
- }
-
- if (splitStr->slen == 1)
- return bsplitcb (str, splitStr->data[0], pos, cb, parm);
-
- buildCharField (&chrs, splitStr);
-
- p = pos;
- do {
- for (i=p; i < str->slen; i++) {
- if (testInCharField (&chrs, str->data[i])) break;
- }
- if ((ret = cb (parm, p, i - p)) < 0) return ret;
- p = i + 1;
- } while (p <= str->slen);
- return BSTR_OK;
-}
-
-/* int bsplitstrcb (const_bstring str, const_bstring splitStr, int pos,
- * int (* cb) (void * parm, int ofs, int len), void * parm)
- *
- * Iterate the set of disjoint sequential substrings over str divided by the
- * substring splitStr. An empty splitStr causes the whole str to be
- * iterated once.
- *
- * Note: Non-destructive modification of str from within the cb function
- * while performing this split is not undefined. bsplitstrcb behaves in
- * sequential lock step with calls to cb. I.e., after returning from a cb
- * that return a non-negative integer, bsplitscb continues from the position
- * 1 character after the last detected split character and it will halt
- * immediately if the length of str falls below this point. However, if the
- * cb function destroys str, then it *must* return with a negative value,
- * otherwise bsplitscb will continue in an undefined manner.
- */
-int bsplitstrcb (const_bstring str, const_bstring splitStr, int pos,
- int (* cb) (void * parm, int ofs, int len), void * parm) {
-int i, p, ret;
-
- if (cb == NULL || str == NULL || pos < 0 || pos > str->slen
- || splitStr == NULL || splitStr->slen < 0) return BSTR_ERR;
-
- if (0 == splitStr->slen) {
- for (i=pos; i < str->slen; i++) {
- if ((ret = cb (parm, i, 1)) < 0) return ret;
- }
- return BSTR_OK;
- }
-
- if (splitStr->slen == 1)
- return bsplitcb (str, splitStr->data[0], pos, cb, parm);
-
- for (i=p=pos; i <= str->slen - splitStr->slen; i++) {
- if (0 == bstr__memcmp (splitStr->data, str->data + i, splitStr->slen)) {
- if ((ret = cb (parm, p, i - p)) < 0) return ret;
- i += splitStr->slen;
- p = i;
- }
- }
- if ((ret = cb (parm, p, str->slen - p)) < 0) return ret;
- return BSTR_OK;
-}
-
-struct genBstrList {
- bstring b;
- struct bstrList * bl;
-};
-
-static int bscb (void * parm, int ofs, int len) {
-struct genBstrList * g = (struct genBstrList *) parm;
- if (g->bl->qty >= g->bl->mlen) {
- int mlen = g->bl->mlen * 2;
- bstring * tbl;
-
- while (g->bl->qty >= mlen) {
- if (mlen < g->bl->mlen) return BSTR_ERR;
- mlen += mlen;
- }
-
- tbl = (bstring *) bstr__realloc (g->bl->entry, sizeof (bstring) * mlen);
- if (tbl == NULL) return BSTR_ERR;
-
- g->bl->entry = tbl;
- g->bl->mlen = mlen;
- }
-
- g->bl->entry[g->bl->qty] = bmidstr (g->b, ofs, len);
- g->bl->qty++;
- return BSTR_OK;
-}
-
-/* struct bstrList * bsplit (const_bstring str, unsigned char splitChar)
- *
- * Create an array of sequential substrings from str divided by the character
- * splitChar.
- */
-struct bstrList * bsplit (const_bstring str, unsigned char splitChar) {
-struct genBstrList g;
-
- if (str == NULL || str->data == NULL || str->slen < 0) return NULL;
-
- g.bl = (struct bstrList *) bstr__alloc (sizeof (struct bstrList));
- if (g.bl == NULL) return NULL;
- g.bl->mlen = 4;
- g.bl->entry = (bstring *) bstr__alloc (g.bl->mlen * sizeof (bstring));
- if (NULL == g.bl->entry) {
- bstr__free (g.bl);
- return NULL;
- }
-
- g.b = (bstring) str;
- g.bl->qty = 0;
- if (bsplitcb (str, splitChar, 0, bscb, &g) < 0) {
- bstrListDestroy (g.bl);
- return NULL;
- }
- return g.bl;
-}
-
-/* struct bstrList * bsplitstr (const_bstring str, const_bstring splitStr)
- *
- * Create an array of sequential substrings from str divided by the entire
- * substring splitStr.
- */
-struct bstrList * bsplitstr (const_bstring str, const_bstring splitStr) {
-struct genBstrList g;
-
- if (str == NULL || str->data == NULL || str->slen < 0) return NULL;
-
- g.bl = (struct bstrList *) bstr__alloc (sizeof (struct bstrList));
- if (g.bl == NULL) return NULL;
- g.bl->mlen = 4;
- g.bl->entry = (bstring *) bstr__alloc (g.bl->mlen * sizeof (bstring));
- if (NULL == g.bl->entry) {
- bstr__free (g.bl);
- return NULL;
- }
-
- g.b = (bstring) str;
- g.bl->qty = 0;
- if (bsplitstrcb (str, splitStr, 0, bscb, &g) < 0) {
- bstrListDestroy (g.bl);
- return NULL;
- }
- return g.bl;
-}
-
-/* struct bstrList * bsplits (const_bstring str, bstring splitStr)
- *
- * Create an array of sequential substrings from str divided by any of the
- * characters in splitStr. An empty splitStr causes a single entry bstrList
- * containing a copy of str to be returned.
- */
-struct bstrList * bsplits (const_bstring str, const_bstring splitStr) {
-struct genBstrList g;
-
- if ( str == NULL || str->slen < 0 || str->data == NULL ||
- splitStr == NULL || splitStr->slen < 0 || splitStr->data == NULL)
- return NULL;
-
- g.bl = (struct bstrList *) bstr__alloc (sizeof (struct bstrList));
- if (g.bl == NULL) return NULL;
- g.bl->mlen = 4;
- g.bl->entry = (bstring *) bstr__alloc (g.bl->mlen * sizeof (bstring));
- if (NULL == g.bl->entry) {
- bstr__free (g.bl);
- return NULL;
- }
- g.b = (bstring) str;
- g.bl->qty = 0;
-
- if (bsplitscb (str, splitStr, 0, bscb, &g) < 0) {
- bstrListDestroy (g.bl);
- return NULL;
- }
- return g.bl;
-}
-
-#if defined (__TURBOC__) && !defined (__BORLANDC__)
-# ifndef BSTRLIB_NOVSNP
-# define BSTRLIB_NOVSNP
-# endif
-#endif
-
-/* Give WATCOM C/C++, MSVC some latitude for their non-support of vsnprintf */
-#if defined(__WATCOMC__) || defined(_MSC_VER)
-#define exvsnprintf(r,b,n,f,a) {r = _vsnprintf (b,n,f,a);}
-#else
-#ifdef BSTRLIB_NOVSNP
-/* This is just a hack. If you are using a system without a vsnprintf, it is
- not recommended that bformat be used at all. */
-#define exvsnprintf(r,b,n,f,a) {vsprintf (b,f,a); r = -1;}
-#define START_VSNBUFF (256)
-#else
-
-#if defined(__GNUC__) && !defined(__APPLE__)
-/* Something is making gcc complain about this prototype not being here, so
- I've just gone ahead and put it in. */
-extern int vsnprintf (char *buf, size_t count, const char *format, va_list arg);
-#endif
-
-#define exvsnprintf(r,b,n,f,a) {r = vsnprintf (b,n,f,a);}
-#endif
-#endif
-
-#if !defined (BSTRLIB_NOVSNP)
-
-#ifndef START_VSNBUFF
-#define START_VSNBUFF (16)
-#endif
-
-/* On IRIX vsnprintf returns n-1 when the operation would overflow the target
- buffer, WATCOM and MSVC both return -1, while C99 requires that the
- returned value be exactly what the length would be if the buffer would be
- large enough. This leads to the idea that if the return value is larger
- than n, then changing n to the return value will reduce the number of
- iterations required. */
-
-/* int bformata (bstring b, const char * fmt, ...)
- *
- * After the first parameter, it takes the same parameters as printf (), but
- * rather than outputting results to stdio, it appends the results to
- * a bstring which contains what would have been output. Note that if there
- * is an early generation of a '\0' character, the bstring will be truncated
- * to this end point.
- */
-int bformata (bstring b, const char * fmt, ...) {
-va_list arglist;
-bstring buff;
-int n, r;
-
- if (b == NULL || fmt == NULL || b->data == NULL || b->mlen <= 0
- || b->slen < 0 || b->slen > b->mlen) return BSTR_ERR;
-
- /* Since the length is not determinable beforehand, a search is
- performed using the truncating "vsnprintf" call (to avoid buffer
- overflows) on increasing potential sizes for the output result. */
-
- if ((n = (int) (2*strlen (fmt))) < START_VSNBUFF) n = START_VSNBUFF;
- if (NULL == (buff = bfromcstralloc (n + 2, ""))) {
- n = 1;
- if (NULL == (buff = bfromcstralloc (n + 2, ""))) return BSTR_ERR;
- }
-
- for (;;) {
- va_start (arglist, fmt);
- exvsnprintf (r, (char *) buff->data, n + 1, fmt, arglist);
- va_end (arglist);
-
- buff->data[n] = (unsigned char) '\0';
- buff->slen = (int) (strlen) ((char *) buff->data);
-
- if (buff->slen < n) break;
-
- if (r > n) n = r; else n += n;
-
- if (BSTR_OK != balloc (buff, n + 2)) {
- bdestroy (buff);
- return BSTR_ERR;
- }
- }
-
- r = bconcat (b, buff);
- bdestroy (buff);
- return r;
-}
-
-/* int bassignformat (bstring b, const char * fmt, ...)
- *
- * After the first parameter, it takes the same parameters as printf (), but
- * rather than outputting results to stdio, it outputs the results to
- * the bstring parameter b. Note that if there is an early generation of a
- * '\0' character, the bstring will be truncated to this end point.
- */
-int bassignformat (bstring b, const char * fmt, ...) {
-va_list arglist;
-bstring buff;
-int n, r;
-
- if (b == NULL || fmt == NULL || b->data == NULL || b->mlen <= 0
- || b->slen < 0 || b->slen > b->mlen) return BSTR_ERR;
-
- /* Since the length is not determinable beforehand, a search is
- performed using the truncating "vsnprintf" call (to avoid buffer
- overflows) on increasing potential sizes for the output result. */
-
- if ((n = (int) (2*strlen (fmt))) < START_VSNBUFF) n = START_VSNBUFF;
- if (NULL == (buff = bfromcstralloc (n + 2, ""))) {
- n = 1;
- if (NULL == (buff = bfromcstralloc (n + 2, ""))) return BSTR_ERR;
- }
-
- for (;;) {
- va_start (arglist, fmt);
- exvsnprintf (r, (char *) buff->data, n + 1, fmt, arglist);
- va_end (arglist);
-
- buff->data[n] = (unsigned char) '\0';
- buff->slen = (int) (strlen) ((char *) buff->data);
-
- if (buff->slen < n) break;
-
- if (r > n) n = r; else n += n;
-
- if (BSTR_OK != balloc (buff, n + 2)) {
- bdestroy (buff);
- return BSTR_ERR;
- }
- }
-
- r = bassign (b, buff);
- bdestroy (buff);
- return r;
-}
-
-/* bstring bformat (const char * fmt, ...)
- *
- * Takes the same parameters as printf (), but rather than outputting results
- * to stdio, it forms a bstring which contains what would have been output.
- * Note that if there is an early generation of a '\0' character, the
- * bstring will be truncated to this end point.
- */
-bstring bformat (const char * fmt, ...) {
-va_list arglist;
-bstring buff;
-int n, r;
-
- if (fmt == NULL) return NULL;
-
- /* Since the length is not determinable beforehand, a search is
- performed using the truncating "vsnprintf" call (to avoid buffer
- overflows) on increasing potential sizes for the output result. */
-
- if ((n = (int) (2*strlen (fmt))) < START_VSNBUFF) n = START_VSNBUFF;
- if (NULL == (buff = bfromcstralloc (n + 2, ""))) {
- n = 1;
- if (NULL == (buff = bfromcstralloc (n + 2, ""))) return NULL;
- }
-
- for (;;) {
- va_start (arglist, fmt);
- exvsnprintf (r, (char *) buff->data, n + 1, fmt, arglist);
- va_end (arglist);
-
- buff->data[n] = (unsigned char) '\0';
- buff->slen = (int) (strlen) ((char *) buff->data);
-
- if (buff->slen < n) break;
-
- if (r > n) n = r; else n += n;
-
- if (BSTR_OK != balloc (buff, n + 2)) {
- bdestroy (buff);
- return NULL;
- }
- }
-
- return buff;
-}
-
-/* int bvcformata (bstring b, int count, const char * fmt, va_list arglist)
- *
- * The bvcformata function formats data under control of the format control
- * string fmt and attempts to append the result to b. The fmt parameter is
- * the same as that of the printf function. The variable argument list is
- * replaced with arglist, which has been initialized by the va_start macro.
- * The size of the appended output is upper bounded by count. If the
- * required output exceeds count, the string b is not augmented with any
- * contents and a value below BSTR_ERR is returned. If a value below -count
- * is returned then it is recommended that the negative of this value be
- * used as an update to the count in a subsequent pass. On other errors,
- * such as running out of memory, parameter errors or numeric wrap around
- * BSTR_ERR is returned. BSTR_OK is returned when the output is successfully
- * generated and appended to b.
- *
- * Note: There is no sanity checking of arglist, and this function is
- * destructive of the contents of b from the b->slen point onward. If there
- * is an early generation of a '\0' character, the bstring will be truncated
- * to this end point.
- */
-int bvcformata (bstring b, int count, const char * fmt, va_list arg) {
-int n, r, l;
-
- if (b == NULL || fmt == NULL || count <= 0 || b->data == NULL
- || b->mlen <= 0 || b->slen < 0 || b->slen > b->mlen) return BSTR_ERR;
-
- if (count > (n = b->slen + count) + 2) return BSTR_ERR;
- if (BSTR_OK != balloc (b, n + 2)) return BSTR_ERR;
-
- exvsnprintf (r, (char *) b->data + b->slen, count + 2, fmt, arg);
-
- /* Did the operation complete successfully within bounds? */
- for (l = b->slen; l <= n; l++) {
- if ('\0' == b->data[l]) {
- b->slen = l;
- return BSTR_OK;
- }
- }
-
- /* Abort, since the buffer was not large enough. The return value
- tries to help set what the retry length should be. */
-
- b->data[b->slen] = '\0';
- if (r > count + 1) { /* Does r specify a particular target length? */
- n = r;
- } else {
- n = count + count; /* If not, just double the size of count */
- if (count > n) n = INT_MAX;
- }
- n = -n;
-
- if (n > BSTR_ERR-1) n = BSTR_ERR-1;
- return n;
-}
-
-#endif
|