code

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <cre2.h>int init_ptn(const char *str_ptn, cre2_regexp_t **pPtn)
{// 初始化cre2的正則表達(dá)式cre2_options_t* opt;opt = cre2_opt_new();//cre2_opt_set_posix_syntax(opt, 1);cre2_opt_set_perl_classes(opt, 1);cre2_opt_set_one_line(opt, 1);// cre2_opt_set_literal(opt, 1);cre2_opt_set_longest_match(opt, 1);*pPtn = cre2_new(str_ptn, strlen(str_ptn), opt);if (cre2_error_code(*pPtn)){fprintf(stderr, "cre2_new error\n");return -1;}return 0;
}int main(int argv, char* argc[])
{cre2_regexp_t * rex = NULL;const char *    pattern = "^(?P<SRC>.+?)(?P<CMD>修改為|修改成|改為|改成|換成|變成|替換成|替成|替換為|換為|更替為)(?P<DEST>.+)$";const char *    text    = "你好修改為不好";init_ptn(pattern, &rex);cre2_string_t input = {.data   = text,.length = strlen(text)};int nmatch = cre2_num_capturing_groups(rex) + 1;;printf("nmatch is %d\n", nmatch);cre2_string_t match[nmatch];memset(match, '\0', nmatch * sizeof(cre2_string_t));int e, src_index, cmd_index, dest_index;e = cre2_match(rex, text, strlen(text), 0, strlen(text), CRE2_UNANCHORED, match, nmatch);printf("e is %d\n", e);if (e != 1){printf("match error\n");}src_index = cre2_find_named_capturing_groups(rex, "SRC");printf("src_index is %d\n", src_index);printf("src is %.*s\n", match[src_index].length, match[src_index].data);cmd_index = cre2_find_named_capturing_groups(rex, "CMD");printf("cmd_index is %d\n", cmd_index);printf("cmd is %.*s\n", match[cmd_index].length, match[cmd_index].data);dest_index = cre2_find_named_capturing_groups(rex, "DEST");printf("dest_index is %d\n", dest_index);printf("dest is %.*s\n", match[dest_index].length, match[dest_index].data);cre2_delete(rex);return 0;
}

res

nmatch is 4
e is 1
src_index is 1
src is 你好
cmd_index is 2
cmd is 修改為
dest_index is 3
dest is 不好

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