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73 lines (63 loc) · 3.05 KB
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/*
* The Minimal snprintf() implementation
*
* Copyright (c) 2013 Michal Ludvig <michal@logix.cz>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the auhor nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __MINI_PRINTF__
#define __MINI_PRINTF__
#ifdef __cplusplus
extern "C" {
#endif
#include <stdarg.h>
#ifdef MINI_PRINTF_ENABLE_OBJECTS
/* If enabled, callback for object types (O and R).
* void* arguments matching %O and %R are sent to handler as obj.
* the result string created by handler at *buf is freed by freeor.
* */
void mini_printf_set_handler(
void * data,
/* handler returns number of chars in *buf; *buf is not NUL-terminated. */
int (*handler)(void* data, void* obj, int ch, int len_hint, char** buf),
void (*freeor)(void* data, void* buf));
#endif
/* String IO interface; returns number of bytes written, not including the ending NUL.
* Always appends a NUL at the end, therefore buffer_len shall be at least 1 in normal operation.
* If buffer is NULL or buffer_len is 0, returns number of bytes to be written, not including the ending NUL.
*/
int mini_vsnprintf(char* buffer, unsigned int buffer_len, const char *fmt, va_list va);
int mini_snprintf(char* buffer, unsigned int buffer_len, const char *fmt, ...);
/* Stream IO interface; returns number of bytes written.
* If puts is NULL, number of bytes to be written.
* puts shall return number of bytes written.
*/
int mini_vpprintf(int (*puts)(char* s, int len, void* buf), void* buf, const char *fmt, va_list va);
int mini_pprintf(int (*puts)(char*s, int len, void* buf), void* buf, const char *fmt, ...);
#ifdef __cplusplus
}
#endif
#define vsnprintf mini_vsnprintf
#define snprintf mini_snprintf
#endif