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
|
#ifndef CMARK_BUFFER_H
#define CMARK_BUFFER_H
#include <stddef.h>
#include <stdarg.h>
#include <string.h>
#include <limits.h>
#include <unistd.h>
#include <stdbool.h>
#include "config.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef ssize_t bufsize_t;
typedef struct {
unsigned char *ptr;
bufsize_t asize, size;
} cmark_strbuf;
extern unsigned char cmark_strbuf__initbuf[];
#define GH_BUF_INIT \
{ cmark_strbuf__initbuf, 0, 0 }
/*
* Maximum size for memory storage on any given `cmark_strbuf` object.
*
* This is a "safe" value to prevent unbounded memory growth when
* parsing arbitrarily large (and potentially malicious) documents.
*
* It is currently set to 32mb, which is a reasonable default for
* production applications. If you need to parse documents larger than
* that, you can increase this value up to `SSIZE_MAX / 2` (which in
* practice resolves to 1/4th of the total address space for the program).
*
* Anything larger than that is a security threat and hence static checks
* will prevent CMark from compiling.
*/
#define BUFSIZE_MAX (32 * 1024 * 1024)
/**
* Initialize a cmark_strbuf structure.
*
* For the cases where GH_BUF_INIT cannot be used to do static
* initialization.
*/
void cmark_strbuf_init(cmark_strbuf *buf, bufsize_t initial_size);
/**
* Grow the buffer to hold at least `target_size` bytes.
*/
bool cmark_strbuf_grow(cmark_strbuf *buf, bufsize_t target_size);
void cmark_strbuf_free(cmark_strbuf *buf);
void cmark_strbuf_swap(cmark_strbuf *buf_a, cmark_strbuf *buf_b);
bufsize_t cmark_strbuf_len(const cmark_strbuf *buf);
int cmark_strbuf_cmp(const cmark_strbuf *a, const cmark_strbuf *b);
unsigned char *cmark_strbuf_detach(cmark_strbuf *buf);
void cmark_strbuf_copy_cstr(char *data, bufsize_t datasize,
const cmark_strbuf *buf);
static CMARK_INLINE const char *cmark_strbuf_cstr(const cmark_strbuf *buf) {
return (char *)buf->ptr;
}
#define cmark_strbuf_at(buf, n) ((buf)->ptr[n])
void cmark_strbuf_set(cmark_strbuf *buf, const unsigned char *data,
bufsize_t len);
void cmark_strbuf_sets(cmark_strbuf *buf, const char *string);
void cmark_strbuf_putc(cmark_strbuf *buf, int c);
void cmark_strbuf_put(cmark_strbuf *buf, const unsigned char *data,
bufsize_t len);
void cmark_strbuf_puts(cmark_strbuf *buf, const char *string);
void cmark_strbuf_clear(cmark_strbuf *buf);
bufsize_t cmark_strbuf_strchr(const cmark_strbuf *buf, int c, bufsize_t pos);
bufsize_t cmark_strbuf_strrchr(const cmark_strbuf *buf, int c, bufsize_t pos);
void cmark_strbuf_drop(cmark_strbuf *buf, bufsize_t n);
void cmark_strbuf_truncate(cmark_strbuf *buf, bufsize_t len);
void cmark_strbuf_rtrim(cmark_strbuf *buf);
void cmark_strbuf_trim(cmark_strbuf *buf);
void cmark_strbuf_normalize_whitespace(cmark_strbuf *s);
void cmark_strbuf_unescape(cmark_strbuf *s);
#ifdef __cplusplus
}
#endif
#endif
|
