113 lines
1.7 KiB
C
113 lines
1.7 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Header$ */
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#if __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#include <string.h>
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extern char *long2str();
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static int
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integral(int c)
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{
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switch (c) {
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case 'b':
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return -2;
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case 'd':
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return 10;
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case 'o':
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return -8;
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case 'u':
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return -10;
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case 'x':
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return -16;
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}
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return 0;
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}
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/*VARARGS2*/
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/*FORMAT1 $
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%s = char *
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%l = long
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%c = int
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%[uxbo] = unsigned int
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%d = int
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$ */
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int
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_format(char *buf, char *fmt, va_list argp)
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{
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register char *pf = fmt;
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register char *pb = buf;
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while (*pf) {
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if (*pf == '%') {
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register int width, base, pad, npad;
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char *arg;
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char cbuf[2];
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char *badformat = "<bad format>";
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/* get padder */
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if (*++pf == '0') {
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pad = '0';
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++pf;
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}
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else
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pad = ' ';
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/* get width */
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width = 0;
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while (*pf >= '0' && *pf <= '9')
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width = 10 * width + *pf++ - '0';
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if (*pf == 's') {
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arg = va_arg(argp, char *);
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}
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else
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if (*pf == 'c') {
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cbuf[0] = va_arg(argp, int);
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cbuf[1] = '\0';
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arg = &cbuf[0];
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}
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else
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if (*pf == 'l') {
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/* alignment ??? */
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base = integral(*++pf);
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if (base) {
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arg = long2str(va_arg(argp,long), base);
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}
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else {
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pf--;
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arg = badformat;
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}
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}
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else
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if ((base = integral(*pf))) {
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arg = long2str((long)va_arg(argp,int), base);
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}
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else
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if (*pf == '%')
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arg = "%";
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else
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arg = badformat;
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npad = width - strlen(arg);
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while (npad-- > 0)
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*pb++ = pad;
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while (*pb++ = *arg++);
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pb--;
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pf++;
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}
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else
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*pb++ = *pf++;
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}
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return pb - buf;
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}
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