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#include "c.h"
static char *outs(const char *str, FILE *f, char *bp) {
if (f)
fputs(str, f);
else
while (*bp = *str++)
bp++;
return bp;
}
static char *outd(long n, FILE *f, char *bp) {
unsigned long m;
char buf[25], *s = buf + sizeof buf;
*--s = '\0';
if (n < 0)
m = -n;
else
m = n;
do
*--s = m%10 + '0';
while ((m /= 10) != 0);
if (n < 0)
*--s = '-';
return outs(s, f, bp);
}
static char *outu(unsigned long n, int base, FILE *f, char *bp) {
char buf[25], *s = buf + sizeof buf;
*--s = '\0';
do
*--s = "0123456789abcdef"[n%base];
while ((n /= base) != 0);
return outs(s, f, bp);
}
void print(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vfprint(stdout, NULL, fmt, ap);
va_end(ap);
}
/* fprint - formatted output to f */
void fprint(FILE *f, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vfprint(f, NULL, fmt, ap);
va_end(ap);
}
/* stringf - formatted output to a saved string */
char *stringf(const char *fmt, ...) {
char buf[1024];
va_list ap;
va_start(ap, fmt);
vfprint(NULL, buf, fmt, ap);
va_end(ap);
return string(buf);
}
/* vfprint - formatted output to f or string bp */
void vfprint(FILE *f, char *bp, const char *fmt, va_list ap) {
for (; *fmt; fmt++)
if (*fmt == '%')
switch (*++fmt) {
case 'd': bp = outd(va_arg(ap, int), f, bp); break;
case 'D': bp = outd(va_arg(ap, long), f, bp); break;
case 'U': bp = outu(va_arg(ap, unsigned long), 10, f, bp); break;
case 'u': bp = outu(va_arg(ap, unsigned), 10, f, bp); break;
case 'o': bp = outu(va_arg(ap, unsigned), 8, f, bp); break;
case 'X': bp = outu(va_arg(ap, unsigned long), 16, f, bp); break;
case 'x': bp = outu(va_arg(ap, unsigned), 16, f, bp); break;
case 'f': case 'e':
case 'g': {
static char format[] = "%f";
char buf[128];
format[1] = *fmt;
sprintf(buf, format, va_arg(ap, double));
bp = outs(buf, f, bp);
}
; break;
case 's': bp = outs(va_arg(ap, char *), f, bp); break;
case 'p': {
void *p = va_arg(ap, void *);
if (p)
bp = outs("0x", f, bp);
bp = outu((unsigned long)p, 16, f, bp);
break;
}
case 'c': if (f) fputc(va_arg(ap, int), f); else *bp++ = va_arg(ap, int); break;
case 'S': { char *s = va_arg(ap, char *);
int n = va_arg(ap, int);
if (s)
for ( ; n-- > 0; s++)
if (f) (void)putc(*s, f); else *bp++ = *s;
} break;
case 'k': { int t = va_arg(ap, int);
static char *tokens[] = {
#define xx(a,b,c,d,e,f,g) g,
#define yy(a,b,c,d,e,f,g) g,
#include "token.h"
};
assert(tokens[t&0177]);
bp = outs(tokens[t&0177], f, bp);
} break;
case 't': { Type ty = va_arg(ap, Type);
assert(f);
outtype(ty ? ty : voidtype, f);
} break;
case 'w': { Coordinate *p = va_arg(ap, Coordinate *);
if (p->file && *p->file) {
bp = outs(p->file, f, bp);
bp = outs(":", f, bp);
}
bp = outd(p->y, f, bp);
} break;
case 'I': { int n = va_arg(ap, int);
while (--n >= 0)
if (f) (void)putc(' ', f); else *bp++ = ' ';
} break;
default: if (f) (void)putc(*fmt, f); else *bp++ = *fmt; break;
}
else if (f)
(void)putc(*fmt, f);
else
*bp++ = *fmt;
if (!f)
*bp = '\0';
}
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