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#ifndef CMARK_CHUNK_H
#define CMARK_CHUNK_H
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <assert.h>
#include "buffer.h"
typedef struct {
unsigned char *data;
int len;
int alloc; // also implies a NULL-terminated string
} cmark_chunk;
static inline void cmark_chunk_free(cmark_chunk *c)
{
if (c->alloc)
free(c->data);
c->data = NULL;
c->alloc = 0;
c->len = 0;
}
static inline void cmark_chunk_ltrim(cmark_chunk *c)
{
assert(!c->alloc);
while (c->len && isspace(c->data[0])) {
c->data++;
c->len--;
}
}
static inline void cmark_chunk_rtrim(cmark_chunk *c)
{
while (c->len > 0) {
if (!isspace(c->data[c->len - 1]))
break;
c->len--;
}
}
static inline void cmark_chunk_trim(cmark_chunk *c)
{
cmark_chunk_ltrim(c);
cmark_chunk_rtrim(c);
}
static inline int cmark_chunk_strchr(cmark_chunk *ch, int c, int offset)
{
const unsigned char *p = (unsigned char *)memchr(ch->data + offset, c, ch->len - offset);
return p ? (int)(p - ch->data) : ch->len;
}
static inline const char *cmark_chunk_to_cstr(cmark_chunk *c)
{
unsigned char *str;
if (c->alloc) {
return (char *)c->data;
}
str = (unsigned char *)malloc(c->len + 1);
if(str != NULL) {
memcpy(str, c->data, c->len);
str[c->len] = 0;
}
c->data = str;
c->alloc = 1;
return (char *)str;
}
static inline void cmark_chunk_set_cstr(cmark_chunk *c, const char *str)
{
if (c->alloc) {
free(c->data);
}
c->len = strlen(str);
c->data = (unsigned char *)malloc(c->len + 1);
c->alloc = 1;
memcpy(c->data, str, c->len + 1);
}
static inline cmark_chunk cmark_chunk_literal(const char *data)
{
cmark_chunk c = {(unsigned char *)data, data ? strlen(data) : 0, 0};
return c;
}
static inline cmark_chunk cmark_chunk_dup(const cmark_chunk *ch, int pos, int len)
{
cmark_chunk c = {ch->data + pos, len, 0};
return c;
}
static inline cmark_chunk cmark_chunk_buf_detach(cmark_strbuf *buf)
{
cmark_chunk c;
c.len = buf->size;
c.data = cmark_strbuf_detach(buf);
c.alloc = 1;
return c;
}
// Convenience macros
#define chunk cmark_chunk
#define chunk_free cmark_chunk_free
#define chunk_ltrim cmark_chunk_ltrim
#define chunk_rtrim cmark_chunk_rtrim
#define chunk_trim cmark_chunk_trim
#define chunk_strchr cmark_chunk_strchr
#define chunk_to_cstr cmark_chunk_to_cstr
#define chunk_literal cmark_chunk_literal
#define chunk_dup cmark_chunk_dup
#define chunk_buf_detach cmark_chunk_buf_detach
#endif
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