strreplace()

static char* strreplace ( const char *  str, const char *  oldstr, const char *  newstr, int *  count  )

static

Definition at line 141 of file raster2pgsql.c.

References _, rtalloc(), and rterror().

Referenced by add_overview_constraints(), add_raster_constraints(), and insert_records().

  {
        const char *tmp = str;
        char *result;
        int found = 0;
        int length, reslen;
        int oldlen = strlen(oldstr);
        int newlen = strlen(newstr);
        int limit = (count != NULL && *count > 0) ? *count : -1;

        tmp = str;
        while ((tmp = strstr(tmp, oldstr)) != NULL && found != limit)
                found++, tmp += oldlen;

        length = strlen(str) + found * (newlen - oldlen);
        if ((result = (char *) rtalloc(length + 1)) == NULL) {
                rterror(_("strreplace: Not enough memory"));
                found = -1;
        }
        else {
                tmp = str;
                limit = found; /* Countdown */
                reslen = 0; /* length of current result */

                /* Replace each old string found with new string  */
                while ((limit-- > 0) && (tmp = strstr(tmp, oldstr)) != NULL) {
                        length = (tmp - str); /* Number of chars to keep intouched */
                        strncpy(result + reslen, str, length); /* Original part keeped */
                        strcpy(result + (reslen += length), newstr); /* Insert new string */

                        reslen += newlen;
                        tmp += oldlen;
                        str = tmp;
                }
                strcpy(result + reslen, str); /* Copies last part and ending null char */
        }

        if (count != NULL) *count = found;
        return result;
}

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