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/*
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/*
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 *  linux/lib/kasprintf.c
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 *  linux/lib/kasprintf.c
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 *
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 *
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 *  Copyright (C) 1991, 1992  Linus Torvalds
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 *  Copyright (C) 1991, 1992  Linus Torvalds
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 */
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 */
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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/* Simplified asprintf. */
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/* Simplified asprintf. */
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char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap)
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char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap)
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{
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{
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	unsigned int len;
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	unsigned int first, second;
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	char *p;
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	char *p;
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	va_list aq;
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	va_list aq;
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	va_copy(aq, ap);
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	va_copy(aq, ap);
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	len = vsnprintf(NULL, 0, fmt, aq);
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	first = vsnprintf(NULL, 0, fmt, aq);
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	va_end(aq);
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	va_end(aq);
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    p = kmalloc(len+1, gfp);
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    p = kmalloc(first+1, gfp);
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	if (!p)
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	if (!p)
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		return NULL;
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		return NULL;
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	second = vsnprintf(p, first+1, fmt, ap);
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	WARN(first != second, "different return values (%u and %u) from vsnprintf(\"%s\", ...)",
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	vsnprintf(p, len+1, fmt, ap);
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	     first, second, fmt);
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	return p;
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	return p;
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}
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}
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EXPORT_SYMBOL(kvasprintf);
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EXPORT_SYMBOL(kvasprintf);
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/*
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 * If fmt contains no % (or is exactly %s), use kstrdup_const. If fmt
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 * (or the sole vararg) points to rodata, we will then save a memory
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 * allocation and string copy. In any case, the return value should be
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 * freed using kfree_const().
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 */
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const char *kvasprintf_const(gfp_t gfp, const char *fmt, va_list ap)
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{
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	if (!strchr(fmt, '%'))
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        return strdup(fmt);
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	if (!strcmp(fmt, "%s"))
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        return strdup(va_arg(ap, const char*));
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	return kvasprintf(gfp, fmt, ap);
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}
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EXPORT_SYMBOL(kvasprintf_const);
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char *kasprintf(gfp_t gfp, const char *fmt, ...)
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char *kasprintf(gfp_t gfp, const char *fmt, ...)
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{
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{
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	va_list ap;
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	va_list ap;
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	char *p;
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	char *p;
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	va_start(ap, fmt);
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	va_start(ap, fmt);
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	p = kvasprintf(gfp, fmt, ap);
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	p = kvasprintf(gfp, fmt, ap);
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	va_end(ap);
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	va_end(ap);
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	return p;
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	return p;
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}
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}
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EXPORT_SYMBOL(kasprintf);
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EXPORT_SYMBOL(kasprintf);