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/* SPDX-License-Identifier: BSD-2-Clause */
/* Copyright 1996-2018 The NASM Authors - All Rights Reserved */
#include "compiler.h"
#include "nasmlib.h"
#include "alloc.h"
/*
* nasm_[v]asprintf() are variants of the semi-standard [v]asprintf()
* functions, except that we return the pointer instead of a count.
* The length of the string (with or without the final NUL) is available
* by calling nasm_last_string_{len,size}() afterwards.
*
* nasm_[v]axprintf() are similar, but allocates a user-defined amount
* of storage before the string, and returns a pointer to the
* allocated buffer. The size of that area is not included in the value
* returned by nasm_last_string_size().
*/
void *nasm_vaxprintf(size_t extra, const char *fmt, va_list ap)
{
char *strp;
va_list xap;
size_t bytes;
int len;
va_copy(xap, ap);
len = vsnprintf(NULL, 0, fmt, xap);
nasm_assert(len >= 0);
bytes = (size_t)len + 1;
_nasm_last_string_size = bytes;
va_end(xap);
strp = nasm_malloc(extra+bytes);
memset(strp, 0, extra);
len = vsnprintf(strp+extra, bytes, fmt, ap);
nasm_assert(bytes == (size_t)len + 1);
return strp;
}
char *nasm_vasprintf(const char *fmt, va_list ap)
{
return nasm_vaxprintf(0, fmt, ap);
}
void *nasm_axprintf(size_t extra, const char *fmt, ...)
{
va_list ap;
void *strp;
va_start(ap, fmt);
strp = nasm_vaxprintf(extra, fmt, ap);
va_end(ap);
return strp;
}
char *nasm_asprintf(const char *fmt, ...)
{
va_list ap;
char *strp;
va_start(ap, fmt);
strp = nasm_vaxprintf(0, fmt, ap);
va_end(ap);
return strp;
}
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