#include <stdio.h>
#include <string.h>
#include <pcre.h>
#define OVECCOUNT 30
#define SRCBUFFER 1024*1024
int main(int argc, char **argv){
pcre *re;
const char *error;
int erroffset;
int ovector[OVECCOUNT];
int rc, i;
if (argc != 2){
fprintf(stderr, "Usage : %s PATTERN\n", argv[0]);
return 1;
}
char *src=malloc(SRCBUFFER);
int srclen = fread(src, sizeof(char), SRCBUFFER, stdin);
re = pcre_compile(argv[1], 0, &error, &erroffset, NULL);
if (re == NULL){
fprintf(stderr, "PCRE compilation failed at offset %d: %s\n", erroffset, error);
return 1;
}
rc = pcre_exec(re, NULL, src, srclen, 0, 0, ovector, OVECCOUNT);
if (rc < 0){
if (rc == PCRE_ERROR_NOMATCH) fprintf(stderr, "Sorry, no match...\n");
else fprintf(stderr, "Matching error %d\n", rc);
return 1;
}
for (i = 0; i < rc; i++){
char *substring_start = src + ovector[2 * i];
int substring_length = ovector[2 * i + 1] - ovector[2 * i];
fprintf(stdout, "%2d: %.*s\n", i, substring_length, substring_start);
}
return 0;
}
运行
echo "苹果香蕉非洲" | ./program '\ba\w+\b'
它打印
0:苹果
我尝试使用 PCRE_MULTILINE 选项,但没有用。如何让它打印所有匹配项?