cmd/zic/scheck.c

#pragma ident   "%Z%%M% %I% %E% SMI"

/* static char  elsieid[] = "@(#)scheck.c   8.17"; */

/*LINTLIBRARY*/

#include "private.h"

const char *
scheck(string, format)
const char * const  string;
const char * const  format;
{
    register char       *fbuf;
    register const char *fp;
    register char       *tp;
    register int        c;
    register const char *result;
    char            dummy;

    result = "";
    if (string == NULL || format == NULL)
        return (result);
    fbuf = imalloc((int)(2 * strlen(format) + 4));
    if (fbuf == NULL)
        return (result);
    fp = format;
    tp = fbuf;
    while ((*tp++ = c = *fp++) != '\0') {
        if (c != '%')
            continue;
        if (*fp == '%') {
            *tp++ = *fp++;
            continue;
        }
        *tp++ = '*';
        if (*fp == '*')
            ++fp;
        while (is_digit(*fp))
            *tp++ = *fp++;
        if (*fp == 'l' || *fp == 'h')
            *tp++ = *fp++;
        else if (*fp == '[')
            do *tp++ = *fp++;
                while (*fp != '\0' && *fp != ']');
        if ((*tp++ = *fp++) == '\0')
            break;
    }
    *(tp - 1) = '%';
    *tp++ = 'c';
    *tp = '\0';
    if (sscanf(string, fbuf, &dummy) != 1)
        result = (char *)format;
    ifree(fbuf);
    return (result);
}