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
|
/*
* Copyright (C) Axel Duch
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
#include <nxt_regex.h>
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
static void *nxt_pcre2_malloc(PCRE2_SIZE size, void *memory_data);
static void nxt_pcre2_free(void *p, void *memory_data);
struct nxt_regex_s {
pcre2_code *code;
nxt_str_t pattern;
};
nxt_regex_t *
nxt_regex_compile(nxt_mp_t *mp, nxt_str_t *source, nxt_regex_err_t *err)
{
int errcode;
nxt_int_t ret;
PCRE2_SIZE erroffset;
nxt_regex_t *re;
pcre2_general_context *general_ctx;
pcre2_compile_context *compile_ctx;
static const u_char alloc_error[] = "memory allocation failed";
general_ctx = pcre2_general_context_create(nxt_pcre2_malloc,
nxt_pcre2_free, mp);
if (nxt_slow_path(general_ctx == NULL)) {
goto alloc_fail;
}
compile_ctx = pcre2_compile_context_create(general_ctx);
if (nxt_slow_path(compile_ctx == NULL)) {
goto alloc_fail;
}
re = nxt_mp_get(mp, sizeof(nxt_regex_t));
if (nxt_slow_path(re == NULL)) {
goto alloc_fail;
}
if (nxt_slow_path(nxt_str_dup(mp, &re->pattern, source) == NULL)) {
goto alloc_fail;
}
re->code = pcre2_compile((PCRE2_SPTR) source->start, source->length, 0,
&errcode, &erroffset, compile_ctx);
if (nxt_slow_path(re->code == NULL)) {
err->offset = erroffset;
ret = pcre2_get_error_message(errcode, (PCRE2_UCHAR *) err->msg,
ERR_BUF_SIZE);
if (ret < 0) {
(void) nxt_sprintf(err->msg, err->msg + ERR_BUF_SIZE,
"compilation failed with unknown "
"error code: %d%Z", errcode);
}
return NULL;
}
#if 0
errcode = pcre2_jit_compile(re, PCRE2_JIT_COMPLETE);
if (nxt_slow_path(errcode != 0 && errcode != PCRE2_ERROR_JIT_BADOPTION)) {
ret = pcre2_get_error_message(errcode, (PCRE2_UCHAR *) err->msg,
ERR_BUF_SIZE);
if (ret < 0) {
(void) nxt_sprintf(err->msg, err->msg + ERR_BUF_SIZE,
"JIT compilation failed with unknown "
"error code: %d%Z", errcode);
}
return NULL;
}
#endif
return re;
alloc_fail:
err->offset = source->length;
nxt_memcpy(err->msg, alloc_error, sizeof(alloc_error));
return NULL;
}
static void *
nxt_pcre2_malloc(PCRE2_SIZE size, void *mp)
{
return nxt_mp_get(mp, size);
}
static void
nxt_pcre2_free(void *p, void *mp)
{
}
nxt_regex_match_t *
nxt_regex_match_create(nxt_mp_t *mp, size_t size)
{
nxt_regex_match_t *match;
pcre2_general_context *ctx;
ctx = pcre2_general_context_create(nxt_pcre2_malloc, nxt_pcre2_free, mp);
if (nxt_slow_path(ctx == NULL)) {
nxt_thread_log_alert("pcre2_general_context_create() failed");
return NULL;
}
match = pcre2_match_data_create(size, ctx);
if (nxt_slow_path(match == NULL)) {
nxt_thread_log_alert("pcre2_match_data_create(%uz) failed", size);
return NULL;
}
return match;
}
nxt_int_t
nxt_regex_match(nxt_regex_t *re, u_char *subject, size_t length,
nxt_regex_match_t *match)
{
nxt_int_t ret;
PCRE2_UCHAR errptr[ERR_BUF_SIZE];
ret = pcre2_match(re->code, (PCRE2_SPTR) subject, length, 0, 0, match,
NULL);
if (nxt_slow_path(ret < PCRE2_ERROR_NOMATCH)) {
if (pcre2_get_error_message(ret, errptr, ERR_BUF_SIZE) < 0) {
nxt_thread_log_error(NXT_LOG_ERR,
"pcre2_match() failed: %d on \"%*s\" "
"using \"%V\"", ret, length, subject,
&re->pattern);
} else {
nxt_thread_log_error(NXT_LOG_ERR,
"pcre2_match() failed: %s (%d) on \"%*s\" "
"using \"%V\"", errptr, ret, length, subject,
&re->pattern);
}
return NXT_ERROR;
}
return (ret != PCRE2_ERROR_NOMATCH);
}
|
