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
|
/*
* Fixed buffer helper useful for debugging, requires no allocation
* which is critical for debugging.
*/
#include "duk_internal.h"
#if defined(DUK_USE_DEBUG)
DUK_INTERNAL void duk_fb_put_bytes(duk_fixedbuffer *fb, const duk_uint8_t *buffer, duk_size_t length) {
duk_size_t avail;
duk_size_t copylen;
avail = (fb->offset >= fb->length ? (duk_size_t) 0 : (duk_size_t) (fb->length - fb->offset));
if (length > avail) {
copylen = avail;
fb->truncated = 1;
} else {
copylen = length;
}
duk_memcpy_unsafe(fb->buffer + fb->offset, buffer, copylen);
fb->offset += copylen;
}
DUK_INTERNAL void duk_fb_put_byte(duk_fixedbuffer *fb, duk_uint8_t x) {
duk_fb_put_bytes(fb, (const duk_uint8_t *) &x, 1);
}
DUK_INTERNAL void duk_fb_put_cstring(duk_fixedbuffer *fb, const char *x) {
duk_fb_put_bytes(fb, (const duk_uint8_t *) x, (duk_size_t) DUK_STRLEN(x));
}
DUK_INTERNAL void duk_fb_sprintf(duk_fixedbuffer *fb, const char *fmt, ...) {
duk_size_t avail;
va_list ap;
va_start(ap, fmt);
avail = (fb->offset >= fb->length ? (duk_size_t) 0 : (duk_size_t) (fb->length - fb->offset));
if (avail > 0) {
duk_int_t res = (duk_int_t) DUK_VSNPRINTF((char *) (fb->buffer + fb->offset), avail, fmt, ap);
if (res < 0) {
/* error */
} else if ((duk_size_t) res >= avail) {
/* (maybe) truncated */
fb->offset += avail;
if ((duk_size_t) res > avail) {
/* actual chars dropped (not just NUL term) */
fb->truncated = 1;
}
} else {
/* normal */
fb->offset += (duk_size_t) res;
}
}
va_end(ap);
}
DUK_INTERNAL void duk_fb_put_funcptr(duk_fixedbuffer *fb, duk_uint8_t *fptr, duk_size_t fptr_size) {
char buf[64 + 1];
duk_debug_format_funcptr(buf, sizeof(buf), fptr, fptr_size);
buf[sizeof(buf) - 1] = (char) 0;
duk_fb_put_cstring(fb, buf);
}
DUK_INTERNAL duk_bool_t duk_fb_is_full(duk_fixedbuffer *fb) {
return (fb->offset >= fb->length);
}
#endif /* DUK_USE_DEBUG */
|
