Mercurial > hg > index.fcgi > rcg > rcg-1
changeset 3:fe4b316b4386
rcg.c: working multiple regexec matches; couple of error handling functions
| author | paulo@twcdns.fastsearch.net |
|---|---|
| date | Mon, 05 Apr 2010 22:37:37 -0700 |
| parents | 4efb50ce4c9c |
| children | 99770a6b967d |
| files | rcg.c |
| diffstat | 1 files changed, 37 insertions(+), 18 deletions(-) [+] |
line diff
1.1 --- a/rcg.c Mon Apr 05 21:02:51 2010 -0700 1.2 +++ b/rcg.c Mon Apr 05 22:37:37 2010 -0700 1.3 @@ -10,52 +10,71 @@ 1.4 const char *CLR_START = "-CLR_START-"; 1.5 const char *CLR_END = "-CLR_END-"; 1.6 1.7 +int re_error(int errcode, const regex_t *re) 1.8 +{ 1.9 + char *err_string = calloc(BUFSIZE, sizeof(char)); 1.10 + regerror(errcode, re, err_string, BUFSIZE*sizeof(char)); 1.11 + fprintf(stderr, "%s \n", err_string); 1.12 + free(err_string); 1.13 + return errcode; 1.14 +} 1.15 + 1.16 +int realloc_error() 1.17 +{ 1.18 + fprintf(stderr, "realloc() failure \n"); 1.19 + return 1; 1.20 +} 1.21 + 1.22 int main(int argc, char **argv) 1.23 { 1.24 char *buf = calloc(BUFSIZE, sizeof(char)); 1.25 1.26 + int re_err; 1.27 regex_t *re = calloc(1, sizeof(regex_t)); 1.28 - regcomp(re, "Hello", REG_EXTENDED); 1.29 + re_err = regcomp(re, "Hello", REG_EXTENDED); 1.30 + if (re_err != 0) 1.31 + exit(re_error(re_err, re)); 1.32 1.33 regmatch_t *rem = calloc(1, sizeof(regmatch_t)); 1.34 1.35 size_t CLR_START_len = strlen(CLR_START); 1.36 size_t CLR_END_len = strlen(CLR_END); 1.37 1.38 - char *out = NULL; 1.39 - unsigned int out_pos = 0; 1.40 - unsigned int buf_pos = 0; 1.41 1.42 while (fgets(buf, BUFSIZE, stdin)) 1.43 { 1.44 - int i = 0; 1.45 int so = -1; 1.46 int eo = -1; 1.47 1.48 - do 1.49 + size_t out_len = strlen(buf); 1.50 + char *out = calloc(out_len, sizeof(char)); 1.51 + unsigned int out_pos = 0; 1.52 + unsigned int buf_pos = 0; 1.53 + 1.54 + while (re_err != REG_NOMATCH) 1.55 { 1.56 - regexec(re, &buf[buf_pos], 1, rem, 0); 1.57 + re_err = regexec(re, &buf[buf_pos], 1, rem, 0); 1.58 1.59 - size_t out_len = strlen(&buf[buf_pos]); 1.60 + //fprintf(stderr, "%s", &buf[buf_pos]); //d// 20100405 PBA 1.61 + 1.62 if (out_len >= (BUFSIZE - buf_pos)) 1.63 out_len = (BUFSIZE - buf_pos) - 1; 1.64 1.65 so = rem[0].rm_so; 1.66 eo = rem[0].rm_eo; 1.67 1.68 - fprintf(stderr, "%d %d \n", so, eo); //d// 20100327 PBA 1.69 + //fprintf(stderr, "%d %d \n", so, eo); //d// 20100327 PBA 1.70 1.71 - if (so >= 0 && eo >= 0) 1.72 + if (re_err != REG_NOMATCH && so >= 0 && eo >= 0) 1.73 { 1.74 int match_len = eo - so; 1.75 out_len += CLR_START_len + CLR_END_len; 1.76 out = (char *)realloc(out, out_len*sizeof(char)); 1.77 - if (i++ == 0) 1.78 - { 1.79 - strncpy(out, buf, so); 1.80 - out_pos += so; 1.81 - buf_pos += so; 1.82 - } 1.83 + if (!out) 1.84 + exit(realloc_error()); 1.85 + strncpy(&out[out_pos], &buf[buf_pos], so); 1.86 + out_pos += so; 1.87 + buf_pos += so; 1.88 strncpy(&out[out_pos], CLR_START, CLR_START_len); 1.89 out_pos += CLR_START_len; 1.90 strncpy(&out[out_pos], &buf[buf_pos], match_len); 1.91 @@ -66,11 +85,11 @@ 1.92 buf_pos += match_len; 1.93 } 1.94 else 1.95 - strncpy(&out[out_pos], &buf[eo], out_len - out_pos); 1.96 + strncpy(&out[out_pos], &buf[buf_pos], out_len - out_pos); 1.97 } 1.98 - while (so >= 0 && eo >= 0); 1.99 1.100 fputs(out, stdout); 1.101 + free(out); 1.102 } 1.103 1.104 return 0;