Function strsubst

src/hacklib.c:535–551

substitute a word or phrase in a string (in place); caller is responsible for ensuring that bp points to big enough buffer */

/* substitute a word or phrase in a string (in place);
   caller is responsible for ensuring that bp points to big enough buffer */
char *
strsubst(
    char *bp,
    const char *orig,
    const char *replacement)
{
    char *found, buf[BUFSZ];
    /* [this could be replaced by strNsubst(bp, orig, replacement, 1)] */

    found = strstr(bp, orig);
    if (found) {
        Strcpy(buf, found + strlen(orig));
        Strcpy(found, replacement);
        Strcat(bp, buf);
    }
    return bp;
}

/* substitute the Nth occurrence of a substring within a string (in place);
   if N is 0, substitute all occurrences; returns the number of substitutions;