61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
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#ifndef HAVE_VPRINTF
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#include "choke-me: no vprintf and no snprintf"
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#endif
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#if defined(HAVE_STDARG_H)
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# include <stdarg.h>
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# ifndef VA_START
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# define VA_START(a, f) va_start(a, f)
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# define VA_END(a) va_end(a)
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# endif /* VA_START */
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# define SNV_USING_STDARG_H
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#elif defined(HAVE_VARARGS_H)
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# include <varargs.h>
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# ifndef VA_START
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# define VA_START(a, f) va_start(a)
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# define VA_END(a) va_end(a)
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# endif /* VA_START */
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# undef SNV_USING_STDARG_H
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#else
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# include "must-have-stdarg-or-varargs"
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#endif
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static int
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snprintf(char *str, size_t n, char const *fmt, ...)
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{
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va_list ap;
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int rval;
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#ifdef VSPRINTF_CHARSTAR
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char *rp;
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VA_START(ap, fmt);
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rp = vsprintf(str, fmt, ap);
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VA_END(ap);
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rval = strlen(rp);
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#else
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VA_START(ap, fmt);
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rval = vsprintf(str, fmt, ap);
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VA_END(ap);
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#endif
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if (rval > n) {
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fprintf(stderr, "snprintf buffer overrun %d > %d\n", rval, (int)n);
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abort();
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}
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return rval;
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}
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static int
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vsnprintf( char *str, size_t n, char const *fmt, va_list ap )
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{
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#ifdef VSPRINTF_CHARSTAR
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return (strlen(vsprintf(str, fmt, ap)));
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#else
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return (vsprintf(str, fmt, ap));
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#endif
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}
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