mirror of
https://github.com/cesanta/slre.git
synced 2025-03-12 16:55:30 +00:00
Added example to find all URLs in a string
This commit is contained in:
Sergey Lyubka
parent
5b2404b776
commit
d958847ee4
27
README.md
27
README.md
@ -31,7 +31,7 @@ most.
|
||||
+? Match one or more times (non-greedy)
|
||||
* Match zero or more times (greedy)
|
||||
*? Match zero or more times (non-greedy)
|
||||
? Match zero or once (greedy)
|
||||
? Match zero or once (non-greedy)
|
||||
x|y Match x or y (alternation operator)
|
||||
\meta Match one of the meta character: ^$().[]*+?|\
|
||||
\xHH Match byte with hex value 0xHH, e.g. \x4a
|
||||
@ -63,13 +63,13 @@ to the N-th opening bracket in the `regex`.
|
||||
the number scanned bytes from the beginning of the string. This way,
|
||||
it is easy to do repetitive matches.
|
||||
|
||||
## Example: parsing HTTP request
|
||||
## Example: parsing HTTP request line
|
||||
|
||||
const char *error_msg, *request = " GET /index.html HTTP/1.0\r\n\r\n";
|
||||
struct slre_cap caps[4];
|
||||
|
||||
if (slre_match("^\\s*(\\S+)\\s+(\\S+)\\s+HTTP/(\\d)\\.(\\d)",
|
||||
request, strlen(request), caps, &error_msg)) {
|
||||
request, strlen(request), caps, 4, &error_msg)) {
|
||||
printf("Method: [%.*s], URI: [%.*s]\n",
|
||||
caps[0].len, caps[0].ptr,
|
||||
caps[1].len, caps[1].ptr);
|
||||
@ -77,6 +77,27 @@ it is easy to do repetitive matches.
|
||||
printf("Error parsing [%s]: [%s]\n", request, error_msg);
|
||||
}
|
||||
|
||||
## Example: find all URLs in a string
|
||||
|
||||
static const char *str =
|
||||
"<img src=\"HTTPS://FOO.COM/x?b#c=tab1\"/> "
|
||||
" <a href=\"http://cesanta.com\">some link</a>";
|
||||
|
||||
static const char *regex = "(?i)((https?://)[^\\s/'\"<>]+/?[^\\s'\"<>]*)";
|
||||
struct slre_cap caps[2];
|
||||
int i, j = 0, str_len = strlen(str);
|
||||
|
||||
while (j < str_len &&
|
||||
(i = slre_match(regex, str + j, str_len - j, caps, 2, NULL)) > 0) {
|
||||
printf("Found URL: [%.*s]\n", caps[0].len, caps[0].ptr);
|
||||
j += i;
|
||||
}
|
||||
|
||||
Output:
|
||||
|
||||
Found URL: [HTTPS://FOO.COM/x?b#c=tab1]
|
||||
Found URL: [http://cesanta.com]
|
||||
|
||||
<!--
|
||||
# Licensing
|
||||
|
||||
|
||||
223
slre.c
223
slre.c
@ -30,6 +30,7 @@ static const char *static_error_unbalanced_brackets = "Unbalanced brackets";
|
||||
static const char *static_error_internal = "Internal error";
|
||||
static const char *static_error_invalid_set = "Invalid [] spec";
|
||||
static const char *static_error_invalid_metacharacter = "Invalid metacharacter";
|
||||
static const char *static_error_more_caps = "Caps array is too small";
|
||||
|
||||
static const char *static_metacharacters = "^$().[]*+?|\\";
|
||||
|
||||
@ -68,6 +69,10 @@ struct regex_info {
|
||||
} branches[MAX_BRANCHES];
|
||||
int num_branches;
|
||||
|
||||
/* Array of captures provided by the user */
|
||||
struct slre_cap *caps;
|
||||
int num_caps;
|
||||
|
||||
/* Error message to be returned to the user */
|
||||
const char *error_msg;
|
||||
|
||||
@ -184,18 +189,16 @@ static int match_set(const char *re, int re_len, const char *s,
|
||||
len += 3;
|
||||
} else {
|
||||
result = match_op((unsigned char *) re + len, (unsigned char *) s, info);
|
||||
len += op_len(re);
|
||||
len += op_len(re + len);
|
||||
}
|
||||
result = (!invert && result) || (invert && !result) ? 1 : 0;
|
||||
}
|
||||
return result;
|
||||
return (!invert && result) || (invert && !result) ? 1 : 0;
|
||||
}
|
||||
|
||||
static int doh(const char *s, int s_len,
|
||||
struct slre_cap *caps, struct regex_info *info, int bi);
|
||||
static int doh(const char *s, int s_len, struct regex_info *info, int bi);
|
||||
|
||||
static int bar(const char *re, int re_len, const char *s, int s_len,
|
||||
struct slre_cap *caps, struct regex_info *info, int bi) {
|
||||
struct regex_info *info, int bi) {
|
||||
/* i is offset in re, j is offset in s, bi is brackets index */
|
||||
int i, j, n, step;
|
||||
|
||||
@ -216,7 +219,7 @@ static int bar(const char *re, int re_len, const char *s, int s_len,
|
||||
if (i + step < re_len && is_quantifier(re + i + step)) {
|
||||
DBG(("QUANTIFIER: [%.*s] %c\n", step, re + i, re[i + step]));
|
||||
if (re[i + step] == '?') {
|
||||
j += bar(re + i, step, s + j, s_len - j, caps, info, bi);
|
||||
j += bar(re + i, step, s + j, s_len - j, info, bi);
|
||||
i++;
|
||||
continue;
|
||||
} else if (re[i + step] == '+' || re[i + step] == '*') {
|
||||
@ -229,13 +232,12 @@ static int bar(const char *re, int re_len, const char *s, int s_len,
|
||||
ni++;
|
||||
}
|
||||
|
||||
while ((n1 = bar(re + i, step, s + j2, s_len - j2,
|
||||
caps, info, bi)) > 0) {
|
||||
while ((n1 = bar(re + i, step, s + j2, s_len - j2, info, bi)) > 0) {
|
||||
if (ni >= re_len) {
|
||||
/* After quantifier, there is nothing */
|
||||
nj = j2 + n1;
|
||||
} else if ((n2 = bar(re + ni, re_len - ni, s + j2 + n1,
|
||||
s_len - (j2 + n1), caps, info, bi)) > 0) {
|
||||
s_len - (j2 + n1), info, bi)) > 0) {
|
||||
nj = j2 + n1 + n2;
|
||||
}
|
||||
if (nj > 0 && non_greedy) break;
|
||||
@ -255,12 +257,12 @@ static int bar(const char *re, int re_len, const char *s, int s_len,
|
||||
bi++;
|
||||
FAIL_IF(bi >= info->num_brackets, static_error_internal);
|
||||
DBG(("CAPTURING [%.*s] [%.*s]\n", step, re + i, s_len - j, s + j));
|
||||
n = doh(s + j, s_len - j, caps, info, bi);
|
||||
n = doh(s + j, s_len - j, info, bi);
|
||||
DBG(("CAPTURED [%.*s] [%.*s]:%d\n", step, re + i, s_len - j, s + j, n));
|
||||
FAIL_IF(n <= 0, info->error_msg);
|
||||
if (caps != NULL) {
|
||||
caps[bi - 1].ptr = s + j;
|
||||
caps[bi - 1].len = n;
|
||||
if (info->caps != NULL) {
|
||||
info->caps[bi - 1].ptr = s + j;
|
||||
info->caps[bi - 1].len = n;
|
||||
}
|
||||
j += n;
|
||||
} else if (re[i] == '^') {
|
||||
@ -283,8 +285,7 @@ static int bar(const char *re, int re_len, const char *s, int s_len,
|
||||
}
|
||||
|
||||
/* Process branch points */
|
||||
static int doh(const char *s, int s_len,
|
||||
struct slre_cap *caps, struct regex_info *info, int bi) {
|
||||
static int doh(const char *s, int s_len, struct regex_info *info, int bi) {
|
||||
const struct bracket_pair *b = &info->brackets[bi];
|
||||
int i = 0, len, result;
|
||||
const char *p;
|
||||
@ -295,7 +296,7 @@ static int doh(const char *s, int s_len,
|
||||
i == b->num_branches ? b->ptr + b->len - p :
|
||||
info->branches[b->branches + i].schlong - p;
|
||||
DBG(("%s %d %d [%.*s]\n", __func__, bi, i, len, p));
|
||||
result = bar(p, len, s, s_len, caps, info, bi);
|
||||
result = bar(p, len, s, s_len, info, bi);
|
||||
} while (i++ < b->num_branches); /* At least 1 iteration */
|
||||
|
||||
|
||||
@ -332,7 +333,7 @@ static void setup_branch_points(struct regex_info *info) {
|
||||
}
|
||||
|
||||
static int foo(const char *re, int re_len, const char *s, int s_len,
|
||||
struct slre_cap *caps, struct regex_info *info) {
|
||||
struct regex_info *info) {
|
||||
int result, i, step, depth = 0;
|
||||
const char *stack[ARRAY_SIZE(info->brackets)];
|
||||
|
||||
@ -363,6 +364,8 @@ static int foo(const char *re, int re_len, const char *s, int s_len,
|
||||
info->brackets[info->num_brackets].ptr = re + i + 1;
|
||||
info->brackets[info->num_brackets].len = -1;
|
||||
info->num_brackets++;
|
||||
FAIL_IF(info->num_caps > 0 && info->num_brackets - 1 > info->num_caps,
|
||||
static_error_more_caps);
|
||||
} else if (re[i] == ')') {
|
||||
int ind = info->brackets[info->num_brackets - 1].len == -1 ?
|
||||
info->num_brackets - 1 : depth;
|
||||
@ -382,7 +385,7 @@ static int foo(const char *re, int re_len, const char *s, int s_len,
|
||||
/* Scan the string from left to right, applying the regex. Stop on match. */
|
||||
result = 0;
|
||||
for (i = 0; i < s_len; i++) {
|
||||
result = doh(s + i, s_len - i, caps, info, 0);
|
||||
result = doh(s + i, s_len - i, info, 0);
|
||||
DBG((" (iter %d) -> %d [%.*s] [%.*s] [%s]\n", i, result, re_len, re,
|
||||
s_len - i, s + i, info->error_msg));
|
||||
if (result > 0 || re[0] == '^') {
|
||||
@ -395,13 +398,15 @@ static int foo(const char *re, int re_len, const char *s, int s_len,
|
||||
}
|
||||
|
||||
int slre_match(const char *regexp, const char *s, int s_len,
|
||||
struct slre_cap *caps, const char **error_msg) {
|
||||
struct slre_cap *caps, int num_caps, const char **error_msg) {
|
||||
struct regex_info info;
|
||||
int result;
|
||||
|
||||
/* Initialize info structure */
|
||||
info.flags = info.num_brackets = info.num_branches = 0;
|
||||
info.error_msg = static_error_no_match;
|
||||
info.error_msg = "";
|
||||
info.num_caps = num_caps;
|
||||
info.caps = caps;
|
||||
|
||||
DBG(("========================> [%s] [%.*s]\n", regexp, s_len, s));
|
||||
|
||||
@ -411,7 +416,7 @@ int slre_match(const char *regexp, const char *s, int s_len,
|
||||
regexp += 4;
|
||||
}
|
||||
|
||||
result = foo(regexp, strlen(regexp), s, s_len, caps, &info);
|
||||
result = foo(regexp, strlen(regexp), s, s_len, &info);
|
||||
|
||||
if (error_msg != NULL) {
|
||||
*error_msg = info.error_msg;
|
||||
@ -447,7 +452,7 @@ static char *slre_replace(const char *regex, const char *buf,
|
||||
|
||||
do {
|
||||
s_len = s == NULL ? 0 : strlen(s);
|
||||
if ((n = slre_match(regex, buf, len, &cap, NULL)) > 0) {
|
||||
if ((n = slre_match(regex, buf, len, &cap, 1, NULL)) > 0) {
|
||||
n1 = cap.ptr - buf, n2 = strlen(sub),
|
||||
n3 = &buf[n] - &cap.ptr[cap.len];
|
||||
} else {
|
||||
@ -471,116 +476,120 @@ int main(void) {
|
||||
struct slre_cap caps[10];
|
||||
|
||||
/* Character sets */
|
||||
ASSERT(slre_match("[abc]", "1c2", 3, NULL, &msg) == 2);
|
||||
ASSERT(slre_match("[abc]", "1C2", 3, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("(?i)[abc]", "1C2", 3, NULL, &msg) == 2);
|
||||
ASSERT(slre_match("[.2]", "1C2", 3, NULL, &msg) == 1);
|
||||
ASSERT(slre_match("[\\S]+", "ab cd", 5, NULL, &msg) == 2);
|
||||
ASSERT(slre_match("[\\S]+\\s+[tyc]*", "ab cd", 5, NULL, &msg) == 4);
|
||||
ASSERT(slre_match("[\\d]", "ab cd", 5, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("[^\\d]", "ab cd", 5, NULL, &msg) == 1);
|
||||
ASSERT(slre_match("[^\\d]+", "abc123", 6, NULL, &msg) == 3);
|
||||
ASSERT(slre_match("[1-5]+", "123456789", 9, NULL, &msg) == 5);
|
||||
ASSERT(slre_match("[1-5a-c]+", "123abcdef", 9, NULL, &msg) == 6);
|
||||
ASSERT(slre_match("[1-5a-]+", "123abcdef", 9, NULL, &msg) == 4);
|
||||
ASSERT(slre_match("[1-5a-]+", "123a--2oo", 9, NULL, &msg) == 7);
|
||||
ASSERT(slre_match("[htps]+://", "https://", 8, NULL, &msg) == 8);
|
||||
ASSERT(slre_match("[abc]", "1c2", 3, NULL, 0, &msg) == 2);
|
||||
ASSERT(slre_match("[abc]", "1C2", 3, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("(?i)[abc]", "1C2", 3, NULL, 0, &msg) == 2);
|
||||
ASSERT(slre_match("[.2]", "1C2", 3, NULL, 0, &msg) == 1);
|
||||
ASSERT(slre_match("[\\S]+", "ab cd", 5, NULL, 0, &msg) == 2);
|
||||
ASSERT(slre_match("[\\S]+\\s+[tyc]*", "ab cd", 5, NULL, 0, &msg) == 4);
|
||||
ASSERT(slre_match("[\\d]", "ab cd", 5, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("[^\\d]", "ab cd", 5, NULL, 0, &msg) == 1);
|
||||
ASSERT(slre_match("[^\\d]+", "abc123", 6, NULL, 0, &msg) == 3);
|
||||
ASSERT(slre_match("[1-5]+", "123456789", 9, NULL, 0, &msg) == 5);
|
||||
ASSERT(slre_match("[1-5a-c]+", "123abcdef", 9, NULL, 0, &msg) == 6);
|
||||
ASSERT(slre_match("[1-5a-]+", "123abcdef", 9, NULL, 0, &msg) == 4);
|
||||
ASSERT(slre_match("[1-5a-]+", "123a--2oo", 9, NULL, 0, &msg) == 7);
|
||||
ASSERT(slre_match("[htps]+://", "https://", 8, NULL, 0, &msg) == 8);
|
||||
ASSERT(slre_match("[^\\s]+", "abc def", 7, NULL, 0, &msg) == 3);
|
||||
ASSERT(slre_match("[^fc]+", "abc def", 7, NULL, 0, &msg) == 2);
|
||||
ASSERT(slre_match("[^d\\sf]+", "abc def", 7, NULL, 0, &msg) == 3);
|
||||
|
||||
/* Flags - case sensitivity */
|
||||
ASSERT(slre_match("FO", "foo", 3, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("(?i)FO", "foo", 3, NULL, &msg) == 2);
|
||||
ASSERT(slre_match("(?m)FO", "foo", 3, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("(?m)x", "foo", 3, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("FO", "foo", 3, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("(?i)FO", "foo", 3, NULL, 0, &msg) == 2);
|
||||
ASSERT(slre_match("(?m)FO", "foo", 3, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("(?m)x", "foo", 3, NULL, 0, &msg) == 0);
|
||||
ASSERT(strcmp(msg, static_error_unexpected_quantifier) == 0);
|
||||
|
||||
ASSERT(slre_match("fo", "foo", 3, NULL, &msg) == 2);
|
||||
ASSERT(slre_match(".+", "foo", 3, NULL, &msg) == 3);
|
||||
ASSERT(slre_match(".+k", "fooklmn", 7, NULL, &msg) == 4);
|
||||
ASSERT(slre_match(".+k.", "fooklmn", 7, NULL, &msg) == 5);
|
||||
ASSERT(slre_match("p+", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("ok", "fooklmn", 7, NULL, &msg) == 4);
|
||||
ASSERT(slre_match("lmno", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("mn.", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("o", "fooklmn", 7, NULL, &msg) == 2);
|
||||
ASSERT(slre_match("^o", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("^", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("n$", "fooklmn", 7, NULL, &msg) == 7);
|
||||
ASSERT(slre_match("n$k", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("l$", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match(".$", "fooklmn", 7, NULL, &msg) == 7);
|
||||
ASSERT(slre_match("a?", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("fo", "foo", 3, NULL, 0, &msg) == 2);
|
||||
ASSERT(slre_match(".+", "foo", 3, NULL, 0, &msg) == 3);
|
||||
ASSERT(slre_match(".+k", "fooklmn", 7, NULL, 0, &msg) == 4);
|
||||
ASSERT(slre_match(".+k.", "fooklmn", 7, NULL, 0, &msg) == 5);
|
||||
ASSERT(slre_match("p+", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("ok", "fooklmn", 7, NULL, 0, &msg) == 4);
|
||||
ASSERT(slre_match("lmno", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("mn.", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("o", "fooklmn", 7, NULL, 0, &msg) == 2);
|
||||
ASSERT(slre_match("^o", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("^", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("n$", "fooklmn", 7, NULL, 0, &msg) == 7);
|
||||
ASSERT(slre_match("n$k", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("l$", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match(".$", "fooklmn", 7, NULL, 0, &msg) == 7);
|
||||
ASSERT(slre_match("a?", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
|
||||
ASSERT(slre_match("\\_", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("\\_", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(strcmp(msg, static_error_invalid_metacharacter) == 0);
|
||||
ASSERT(slre_match("+", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("+", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(strcmp(msg, static_error_unexpected_quantifier) == 0);
|
||||
ASSERT(slre_match("()+", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("()+", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(strcmp(msg, static_error_no_match) == 0);
|
||||
ASSERT(slre_match("\\x", "12", 2, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("\\x", "12", 2, NULL, 0, &msg) == 0);
|
||||
ASSERT(strcmp(msg, static_error_invalid_metacharacter) == 0);
|
||||
ASSERT(slre_match("\\xhi", "12", 2, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("\\xhi", "12", 2, NULL, 0, &msg) == 0);
|
||||
ASSERT(strcmp(msg, static_error_invalid_metacharacter) == 0);
|
||||
ASSERT(slre_match("\\x20", "_ J", 3, NULL, &msg) == 2);
|
||||
ASSERT(slre_match("\\x4A", "_ J", 3, NULL, &msg) == 3);
|
||||
ASSERT(slre_match("\\d+", "abc123def", 9, NULL, &msg) == 6);
|
||||
ASSERT(slre_match("\\x20", "_ J", 3, NULL, 0, &msg) == 2);
|
||||
ASSERT(slre_match("\\x4A", "_ J", 3, NULL, 0, &msg) == 3);
|
||||
ASSERT(slre_match("\\d+", "abc123def", 9, NULL, 0, &msg) == 6);
|
||||
|
||||
/* Balancing brackets */
|
||||
ASSERT(slre_match("(x))", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("(x))", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(strcmp(msg, static_error_unbalanced_brackets) == 0);
|
||||
ASSERT(slre_match("(", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("(", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
ASSERT(strcmp(msg, static_error_unbalanced_brackets) == 0);
|
||||
|
||||
ASSERT(slre_match("klz?mn", "fooklmn", 7, NULL, &msg) == 7);
|
||||
ASSERT(slre_match("fa?b", "fooklmn", 7, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("klz?mn", "fooklmn", 7, NULL, 0, &msg) == 7);
|
||||
ASSERT(slre_match("fa?b", "fooklmn", 7, NULL, 0, &msg) == 0);
|
||||
|
||||
/* Brackets & capturing */
|
||||
ASSERT(slre_match("^(te)", "tenacity subdues all", 20, caps, &msg) == 2);
|
||||
ASSERT(slre_match("(bc)", "abcdef", 6, caps, &msg) == 3);
|
||||
ASSERT(slre_match(".(d.)", "abcdef", 6, caps, &msg) == 5);
|
||||
ASSERT(slre_match(".(d.)\\)?", "abcdef", 6, caps, &msg) == 5);
|
||||
ASSERT(slre_match("^(te)", "tenacity subdues all", 20, caps, 10, &msg) == 2);
|
||||
ASSERT(slre_match("(bc)", "abcdef", 6, caps, 10, &msg) == 3);
|
||||
ASSERT(slre_match(".(d.)", "abcdef", 6, caps, 10, &msg) == 5);
|
||||
ASSERT(slre_match(".(d.)\\)?", "abcdef", 6, caps, 10, &msg) == 5);
|
||||
ASSERT(caps[0].len == 2);
|
||||
ASSERT(memcmp(caps[0].ptr, "de", 2) == 0);
|
||||
ASSERT(slre_match("(.+)", "123", 3, caps, &msg) == 3);
|
||||
ASSERT(slre_match("(2.+)", "123", 3, caps, &msg) == 3);
|
||||
ASSERT(slre_match("(.+)", "123", 3, caps, 10, &msg) == 3);
|
||||
ASSERT(slre_match("(2.+)", "123", 3, caps, 10, &msg) == 3);
|
||||
ASSERT(caps[0].len == 2);
|
||||
ASSERT(memcmp(caps[0].ptr, "23", 2) == 0);
|
||||
ASSERT(slre_match("(.+2)", "123", 3, caps, &msg) == 2);
|
||||
ASSERT(slre_match("(.+2)", "123", 3, caps, 10, &msg) == 2);
|
||||
ASSERT(caps[0].len == 2);
|
||||
ASSERT(memcmp(caps[0].ptr, "12", 2) == 0);
|
||||
ASSERT(slre_match("(.*(2.))", "123", 3, caps, &msg) == 3);
|
||||
ASSERT(slre_match("(.)(.)", "123", 3, caps, &msg) == 2);
|
||||
ASSERT(slre_match("(\\d+)\\s+(\\S+)", "12 hi", 5, caps, &msg) == 5);
|
||||
ASSERT(slre_match("ab(cd)+ef", "abcdcdef", 8, NULL, &msg) == 8);
|
||||
ASSERT(slre_match("ab(cd)*ef", "abcdcdef", 8, NULL, &msg) == 8);
|
||||
ASSERT(slre_match("ab(cd)+?ef", "abcdcdef", 8, NULL, &msg) == 8);
|
||||
ASSERT(slre_match("ab(cd)+?.", "abcdcdef", 8, NULL, &msg) == 5);
|
||||
ASSERT(slre_match("ab(cd)?", "abcdcdef", 8, NULL, &msg) == 4);
|
||||
ASSERT(slre_match("(.*(2.))", "123", 3, caps, 10, &msg) == 3);
|
||||
ASSERT(slre_match("(.)(.)", "123", 3, caps, 10, &msg) == 2);
|
||||
ASSERT(slre_match("(\\d+)\\s+(\\S+)", "12 hi", 5, caps, 10, &msg) == 5);
|
||||
ASSERT(slre_match("ab(cd)+ef", "abcdcdef", 8, NULL, 0, &msg) == 8);
|
||||
ASSERT(slre_match("ab(cd)*ef", "abcdcdef", 8, NULL, 0, &msg) == 8);
|
||||
ASSERT(slre_match("ab(cd)+?ef", "abcdcdef", 8, NULL, 0, &msg) == 8);
|
||||
ASSERT(slre_match("ab(cd)+?.", "abcdcdef", 8, NULL, 0, &msg) == 5);
|
||||
ASSERT(slre_match("ab(cd)?", "abcdcdef", 8, NULL, 0, &msg) == 4);
|
||||
ASSERT(slre_match("a(b)(cd)", "abcdcdef", 8, caps, 1, &msg) == 0);
|
||||
ASSERT(strcmp(msg, static_error_more_caps) == 0);
|
||||
|
||||
/* Greedy vs non-greedy */
|
||||
ASSERT(slre_match(".+c", "abcabc", 6, NULL, &msg) == 6);
|
||||
ASSERT(slre_match(".+?c", "abcabc", 6, NULL, &msg) == 3);
|
||||
ASSERT(slre_match(".*?c", "abcabc", 6, NULL, &msg) == 3);
|
||||
ASSERT(slre_match(".*c", "abcabc", 6, NULL, &msg) == 6);
|
||||
ASSERT(slre_match("bc.d?k?b+", "abcabc", 6, NULL, &msg) == 5);
|
||||
ASSERT(slre_match(".+c", "abcabc", 6, NULL, 0, &msg) == 6);
|
||||
ASSERT(slre_match(".+?c", "abcabc", 6, NULL, 0, &msg) == 3);
|
||||
ASSERT(slre_match(".*?c", "abcabc", 6, NULL, 0, &msg) == 3);
|
||||
ASSERT(slre_match(".*c", "abcabc", 6, NULL, 0, &msg) == 6);
|
||||
ASSERT(slre_match("bc.d?k?b+", "abcabc", 6, NULL, 0, &msg) == 5);
|
||||
|
||||
/* Branching */
|
||||
ASSERT(slre_match("|", "abc", 3, NULL, &msg) == 0);
|
||||
ASSERT(slre_match("|.", "abc", 3, NULL, &msg) == 1);
|
||||
ASSERT(slre_match("x|y|b", "abc", 3, NULL, &msg) == 2);
|
||||
ASSERT(slre_match("k(xx|yy)|ca", "abcabc", 6, NULL, &msg) == 4);
|
||||
ASSERT(slre_match("k(xx|yy)|ca|bc", "abcabc", 6, NULL, &msg) == 3);
|
||||
ASSERT(slre_match("(|.c)", "abc", 3, caps, &msg) == 3);
|
||||
ASSERT(slre_match("|", "abc", 3, NULL, 0, &msg) == 0);
|
||||
ASSERT(slre_match("|.", "abc", 3, NULL, 0, &msg) == 1);
|
||||
ASSERT(slre_match("x|y|b", "abc", 3, NULL, 0, &msg) == 2);
|
||||
ASSERT(slre_match("k(xx|yy)|ca", "abcabc", 6, NULL, 0, &msg) == 4);
|
||||
ASSERT(slre_match("k(xx|yy)|ca|bc", "abcabc", 6, NULL, 0, &msg) == 3);
|
||||
ASSERT(slre_match("(|.c)", "abc", 3, caps, 10, &msg) == 3);
|
||||
ASSERT(caps[0].len == 2);
|
||||
ASSERT(memcmp(caps[0].ptr, "bc", 2) == 0);
|
||||
|
||||
|
||||
/* Example: HTTP request */
|
||||
{
|
||||
/* Example: HTTP request */
|
||||
const char *error_msg, *request = " GET /index.html HTTP/1.0\r\n\r\n";
|
||||
struct slre_cap caps[4];
|
||||
|
||||
if (slre_match("^\\s*(\\S+)\\s+(\\S+)\\s+HTTP/(\\d)\\.(\\d)",
|
||||
request, strlen(request), caps, &error_msg)) {
|
||||
request, strlen(request), caps, 4, &error_msg)) {
|
||||
printf("Method: [%.*s], URI: [%.*s]\n",
|
||||
caps[0].len, caps[0].ptr,
|
||||
caps[1].len, caps[1].ptr);
|
||||
@ -593,6 +602,7 @@ int main(void) {
|
||||
}
|
||||
|
||||
{
|
||||
/* Example: string replacement */
|
||||
char *s = slre_replace("({{.+?}})",
|
||||
"Good morning, {{foo}}. How are you, {{bar}}?",
|
||||
"Bob");
|
||||
@ -601,6 +611,23 @@ int main(void) {
|
||||
free(s);
|
||||
}
|
||||
|
||||
{
|
||||
/* Example: find all URLs in a string */
|
||||
static const char *str =
|
||||
"<img src=\"HTTPS://FOO.COM/x?b#c=tab1\"/> "
|
||||
" <a href=\"http://cesanta.com\">some link</a>";
|
||||
|
||||
static const char *regex = "(?i)((https?://)[^\\s/'\"<>]+/?[^\\s'\"<>]*)";
|
||||
struct slre_cap caps[2];
|
||||
int i, j = 0, str_len = strlen(str);
|
||||
|
||||
while (j < str_len &&
|
||||
(i = slre_match(regex, str + j, str_len - j, caps, 2, NULL)) > 0) {
|
||||
printf("Found URL: [%.*s]\n", caps[0].len, caps[0].ptr);
|
||||
j += i;
|
||||
}
|
||||
}
|
||||
|
||||
printf("Unit test %s (total test: %d, failed tests: %d)\n",
|
||||
static_failed_tests > 0 ? "FAILED" : "PASSED",
|
||||
static_total_tests, static_failed_tests);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user