Commit 47ce4434 authored by Marek Vavruša's avatar Marek Vavruša

contrib/ccan: added ‘asprintf’ compatibility

parent 824a69fc
../../licenses/BSD-MIT
\ No newline at end of file
#include "config.h"
#include <stdio.h>
#include <string.h>
/**
* asprintf - asprintf wrapper (and if necessary, implementation).
*
* This provides a convenient wrapper for asprintf, and also implements
* asprintf if necessary.
*
* Author: Rusty Russell <rusty@rustcorp.com.au>
*
* License: MIT
*
* Example:
* #include <ccan/asprintf/asprintf.h>
* #include <unistd.h>
* #include <err.h>
*
* int main(int argc, char *argv[])
* {
* char *p = afmt("This program has %i arguments", argc);
* int ret;
*
* while ((ret = write(STDOUT_FILENO, p, strlen(p))) > 0) {
* p += ret;
* if (!*p)
* exit(0);
* }
* err(1, "Writing to stdout");
* }
*/
int main(int argc, char *argv[])
{
/* Expect exactly one argument */
if (argc != 2)
return 1;
if (strcmp(argv[1], "depends") == 0) {
printf("ccan/compiler\n");
return 0;
}
return 1;
}
/* Licensed under BSD-MIT - see LICENSE file for details */
#include <ccan/asprintf/asprintf.h>
#include <stdarg.h>
#include <stdio.h>
char *PRINTF_FMT(1, 2) afmt(const char *fmt, ...)
{
va_list ap;
char *ptr;
va_start(ap, fmt);
/* The BSD version apparently sets ptr to NULL on fail. GNU loses. */
if (vasprintf(&ptr, fmt, ap) < 0)
ptr = NULL;
va_end(ap);
return ptr;
}
#if !HAVE_ASPRINTF
#include <stdarg.h>
#include <stdlib.h>
int vasprintf(char **strp, const char *fmt, va_list ap)
{
int len;
va_list ap_copy;
/* We need to make a copy of ap, since it's a use-once. */
va_copy(ap_copy, ap);
len = vsnprintf(NULL, 0, fmt, ap_copy);
va_end(ap_copy);
/* Until version 2.0.6 glibc would return -1 on truncated output.
* OTOH, they had asprintf. */
if (len < 0)
return -1;
*strp = malloc(len+1);
if (!*strp)
return -1;
return vsprintf(*strp, fmt, ap);
}
int asprintf(char **strp, const char *fmt, ...)
{
va_list ap;
int len;
va_start(ap, fmt);
len = vasprintf(strp, fmt, ap);
va_end(ap);
return len;
}
#endif /* !HAVE_ASPRINTF */
/* Licensed under BSD-MIT - see LICENSE file for details */
#ifndef CCAN_ASPRINTF_H
#define CCAN_ASPRINTF_H
#include "config.h"
#include <ccan/compiler/compiler.h>
/**
* afmt - allocate and populate a string with the given format.
* @fmt: printf-style format.
*
* This is a simplified asprintf interface. Returns NULL on error.
*/
char *PRINTF_FMT(1, 2) afmt(const char *fmt, ...);
#if HAVE_ASPRINTF
#include <stdio.h>
#else
#include <stdarg.h>
/**
* asprintf - printf to a dynamically-allocated string.
* @strp: pointer to the string to allocate.
* @fmt: printf-style format.
*
* Returns -1 (and leaves @strp undefined) on an error. Otherwise returns
* number of bytes printed into @strp.
*
* Example:
* static char *greeting(const char *name)
* {
* char *str;
* int len = asprintf(&str, "Hello %s", name);
* if (len < 0)
* return NULL;
* return str;
* }
*/
int PRINTF_FMT(2, 3) asprintf(char **strp, const char *fmt, ...);
/**
* vasprintf - vprintf to a dynamically-allocated string.
* @strp: pointer to the string to allocate.
* @fmt: printf-style format.
*
* Returns -1 (and leaves @strp undefined) on an error. Otherwise returns
* number of bytes printed into @strp.
*/
int vasprintf(char **strp, const char *fmt, va_list ap);
#endif
#endif /* CCAN_ASPRINTF_H */
kresd_EMBED := \
contrib/ccan/json/json.c
contrib/ccan/json/json.c \
contrib/ccan/asprintf/asprintf.c
kresd_SOURCES := \
$(kresd_EMBED) \
daemon/io.c \
......
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