summaryrefslogtreecommitdiff
path: root/src/buffer.h
blob: fa1639e115bfe621155a4a505c309a500c2533ab (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
#ifndef CMARK_BUFFER_H
#define CMARK_BUFFER_H

#include <stddef.h>
#include <stdarg.h>
#include "config.h"
#include "cmark_export.h"

typedef struct {
	unsigned char *ptr;
	int asize, size;
} cmark_strbuf;

CMARK_EXPORT
extern unsigned char cmark_strbuf__initbuf[];

CMARK_EXPORT
extern unsigned char cmark_strbuf__oom[];

#define CMARK_GH_BUF_INIT { cmark_strbuf__initbuf, 0, 0 }

/**
 * Initialize a strbuf structure.
 *
 * For the cases where GH_BUF_INIT cannot be used to do static
 * initialization.
 */
CMARK_EXPORT
void cmark_strbuf_init(cmark_strbuf *buf, int initial_size);

/**
 * Attempt to grow the buffer to hold at least `target_size` bytes.
 *
 * If the allocation fails, this will return an error.  If mark_oom is true,
 * this will mark the buffer as invalid for future operations; if false,
 * existing buffer content will be preserved, but calling code must handle
 * that buffer was not expanded.
 */
CMARK_EXPORT
int cmark_strbuf_try_grow(cmark_strbuf *buf, int target_size, bool mark_oom);

/**
 * Grow the buffer to hold at least `target_size` bytes.
 *
 * If the allocation fails, this will return an error and the buffer will be
 * marked as invalid for future operations, invaliding contents.
 *
 * @return 0 on success or -1 on failure
 */
CMARK_EXPORT
int cmark_strbuf_grow(cmark_strbuf *buf, int target_size);

CMARK_EXPORT
void cmark_strbuf_free(cmark_strbuf *buf);
CMARK_EXPORT
void cmark_strbuf_swap(cmark_strbuf *buf_a, cmark_strbuf *buf_b);

/**
 * Test if there have been any reallocation failures with this strbuf.
 *
 * Any function that writes to a strbuf can fail due to memory allocation
 * issues.  If one fails, the strbuf will be marked with an OOM error and
 * further calls to modify the buffer will fail.  Check strbuf_oom() at the
 * end of your sequence and it will be true if you ran out of memory at any
 * point with that buffer.
 *
 * @return false if no error, true if allocation error
 */
CMARK_EXPORT
bool cmark_strbuf_oom(const cmark_strbuf *buf);

CMARK_EXPORT
size_t cmark_strbuf_len(const cmark_strbuf *buf);

CMARK_EXPORT
int cmark_strbuf_cmp(const cmark_strbuf *a, const cmark_strbuf *b);

CMARK_EXPORT
void cmark_strbuf_attach(cmark_strbuf *buf, unsigned char *ptr, int asize);
CMARK_EXPORT
unsigned char *cmark_strbuf_detach(cmark_strbuf *buf);
CMARK_EXPORT
inline const char *cmark_strbuf_cstr(const cmark_strbuf *buf);
CMARK_EXPORT
void cmark_strbuf_copy_cstr(char *data, int datasize, const cmark_strbuf *buf);

#define cmark_strbuf_at(buf, n) ((buf)->ptr[n])

/*
 * Functions below that return int value error codes will return 0 on
 * success or -1 on failure (which generally means an allocation failed).
 * Using a strbuf where the allocation has failed with result in -1 from
 * all further calls using that buffer.  As a result, you can ignore the
 * return code of these functions and call them in a series then just call
 * strbuf_oom at the end.
 */
CMARK_EXPORT
int cmark_strbuf_set(cmark_strbuf *buf, const unsigned char *data, int len);
CMARK_EXPORT
int cmark_strbuf_sets(cmark_strbuf *buf, const char *string);
CMARK_EXPORT
int cmark_strbuf_putc(cmark_strbuf *buf, int c);
CMARK_EXPORT
int cmark_strbuf_put(cmark_strbuf *buf, const unsigned char *data, int len);
CMARK_EXPORT
int cmark_strbuf_puts(cmark_strbuf *buf, const char *string);
CMARK_EXPORT
int cmark_strbuf_printf(cmark_strbuf *buf, const char *format, ...)
	__attribute__((format (printf, 2, 3)));
CMARK_EXPORT
int cmark_strbuf_vprintf(cmark_strbuf *buf, const char *format, va_list ap);
CMARK_EXPORT
void cmark_strbuf_clear(cmark_strbuf *buf);

CMARK_EXPORT
int cmark_strbuf_strchr(const cmark_strbuf *buf, int c, int pos);
CMARK_EXPORT
int cmark_strbuf_strrchr(const cmark_strbuf *buf, int c, int pos);
CMARK_EXPORT
void cmark_strbuf_drop(cmark_strbuf *buf, int n);
CMARK_EXPORT
void cmark_strbuf_truncate(cmark_strbuf *buf, int len);
CMARK_EXPORT
void cmark_strbuf_rtrim(cmark_strbuf *buf);
CMARK_EXPORT
void cmark_strbuf_trim(cmark_strbuf *buf);
CMARK_EXPORT
void cmark_strbuf_normalize_whitespace(cmark_strbuf *s);
CMARK_EXPORT
void cmark_strbuf_unescape(cmark_strbuf *s);

#ifndef CMARK_NO_SHORT_NAMES
  #define strbuf                        cmark_strbuf
  #define strbuf__initbuf               cmark_strbuf__initbuf
  #define strbuf__oom                   cmark_strbuf__oom
  #define GH_BUF_INIT                   CMARK_GH_BUF_INIT
  #define strbuf_init                   cmark_strbuf_init
  #define strbuf_try_grow               cmark_strbuf_try_grow
  #define strbuf_grow                   cmark_strbuf_grow
  #define strbuf_free                   cmark_strbuf_free
  #define strbuf_swap                   cmark_strbuf_swap
  #define strbuf_oom                    cmark_strbuf_oom
  #define strbuf_len                    cmark_strbuf_len
  #define strbuf_cmp                    cmark_strbuf_cmp
  #define strbuf_attach                 cmark_strbuf_attach
  #define strbuf_detach                 cmark_strbuf_detach
  #define strbuf_copy_cstr              cmark_strbuf_copy_cstr
  #define strbuf_at                     cmark_strbuf_at
  #define strbuf_set                    cmark_strbuf_set
  #define strbuf_sets                   cmark_strbuf_sets
  #define strbuf_putc                   cmark_strbuf_putc
  #define strbuf_put                    cmark_strbuf_put
  #define strbuf_puts                   cmark_strbuf_puts
  #define strbuf_printf                 cmark_strbuf_printf
  #define strbuf_vprintf                cmark_strbuf_vprintf
  #define strbuf_clear                  cmark_strbuf_clear
  #define strbuf_strchr                 cmark_strbuf_strchr
  #define strbuf_strrchr                cmark_strbuf_strrchr
  #define strbuf_drop                   cmark_strbuf_drop
  #define strbuf_truncate               cmark_strbuf_truncate
  #define strbuf_rtrim                  cmark_strbuf_rtrim
  #define strbuf_trim                   cmark_strbuf_trim
  #define strbuf_normalize_whitespace   cmark_strbuf_normalize_whitespace
  #define strbuf_unescape               cmark_strbuf_unescape
#endif

#endif