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/*
* This file is part of the sn package.
* Distribution of sn is covered by the GNU GPL. See file COPYING.
* Copyright 1998-2000 Harold Tay.
* Copyright 2000- Patrik Rdman.
*/
#ifndef FORMAT_H
#define FORMAT_H
#include <stdarg.h>
/*
* Formatting like printf(3). Not all format specs are supported,
* in particular, no field specs allowed.
*/
/* Print integer into tmp, returns pointer to start of it */
extern char *istr (int i, int base, char *tmp);
extern char *uistr (unsigned int u, int base, char *tmp);
/* 2 forms, like snprintf */
extern int formatv (char *buf, int size, char *fmt, va_list ap);
extern int formats (char *buf, int size, char *fmt, ...);
/* "Returns" (in p) string based on format character c. Length of string,
which may NOT be null terminated, is in len.
This is now a macro because it uses va_arg and you can only use that in a
single function call. Macro-ized by Chris Niekel <chris@niekel.net> */
#define vachar(c, ap, len) \
{ \
int e, i; \
unsigned u; \
p = 0; \
switch(c) \
{ \
case 'S': len = va_arg(ap, int); p = va_arg(ap, char *); break; \
case 's': p = va_arg(ap, char *); len = strlen(p); break; \
case 'i': /* fall through */ \
case 'd': i = va_arg(ap, int); p = istr(i, 10, tmp); len = strlen(p); break; \
case 'u': u = va_arg(ap, unsigned); p = uistr(u, 10, tmp); len = strlen(p); break; \
case 'o': u = va_arg(ap, unsigned); p = uistr(u, 8, tmp); len = strlen(p); break; \
case 'x': u = va_arg(ap, unsigned); p = uistr(u, 16, tmp); len = strlen(p); break; \
case 'm': p = strerror(errno); len = strlen(p); break; \
case '%': len = 1; p = "%"; break; \
default: len = 0; p = ""; \
} \
}
#endif
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