WebSVN – HelenOS – Diff – /branches/arm/uspace/lib/libc/generic/io/asprintf.c


/*
 * Copyright (c) 2006 Josef Cejka
 * Copyright (c) 2008 Jakub Jermar
 * 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
 */
 
/** @addtogroup libc
 * @{
 */
/** @file
 */
 
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <io/printf_core.h>
 
static int asprintf_str_write(const char *str, size_t count, void *unused)
{
    return str_nlength(str, count);
}
 
static int asprintf_wstr_write(const wchar_t *str, size_t count, void *unused)
{
    return wstr_nlength(str, count);
}
 
/** Allocate and print to string.
 *
 * @param strp Address of the pointer where to store the address of
 *             the newly allocated string.
 * @fmt        Format string.
 *
 * @return Number of characters printed or a negative error code.
 *
 */
int asprintf(char **strp, const char *fmt, ...)
{
    struct printf_spec ps = {
        asprintf_str_write,
        asprintf_wstr_write,
        NULL
    };
   
    va_list args;
    va_start(args, fmt);
   
    int ret = printf_core(fmt, &ps, args);
    va_end(args);
   
    if (ret > 0) {
        *strp = malloc(STR_BOUNDS(ret) + 1);
        if (*strp == NULL)
            return -1;
       
        va_start(args, fmt);
        vsnprintf(*strp, STR_BOUNDS(ret) + 1, fmt, args);
        va_end(args);
    }
   
    return ret;
}
 
/** @}
 */
 

Rev 4482	Rev 4647
1	/*	1	/*
2	* Copyright (c) 2006 Josef Cejka	2	* Copyright (c) 2006 Josef Cejka
3	* Copyright (c) 2008 Jakub Jermar	3	* Copyright (c) 2008 Jakub Jermar
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products	15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	/** @addtogroup libc	30	/** @addtogroup libc
31	* @{	31	* @{
32	*/	32	*/
33	/** @file	33	/** @file
34	*/	34	*/
35		35
36	#include <stdarg.h>	36	#include <stdarg.h>
37	#include <stdio.h>	37	#include <stdio.h>
38	#include <stdlib.h>	38	#include <stdlib.h>
39	#include <string.h>	39	#include <string.h>
40	#include <io/printf_core.h>	40	#include <io/printf_core.h>
41		41
42	static int asprintf_str_write(const char str, size_t count, void unused)	42	static int asprintf_str_write(const char str, size_t count, void unused)
43	{	43	{
44	return str_nlength(str, count);	44	return str_nlength(str, count);
45	}	45	}
46		46
47	static int asprintf_wstr_write(const wchar_t str, size_t count, void unused)	47	static int asprintf_wstr_write(const wchar_t str, size_t count, void unused)
48	{	48	{
49	return wstr_nlength(str, count);	49	return wstr_nlength(str, count);
50	}	50	}
51		51
52	/** Allocate and print to string.	52	/** Allocate and print to string.
53	*	53	*
54	* @param strp Address of the pointer where to store the address of	54	* @param strp Address of the pointer where to store the address of
55	* the newly allocated string.	55	* the newly allocated string.
56	* @fmt Format string.	56	* @fmt Format string.
57	*	57	*
58	* @return Number of characters printed or a negative error code.	58	* @return Number of characters printed or a negative error code.
59	*	59	*
60	*/	60	*/
61	int asprintf(char *strp, const char fmt, ...)	61	int asprintf(char *strp, const char fmt, ...)
62	{	62	{
63	struct printf_spec ps = {	63	struct printf_spec ps = {
64	asprintf_str_write,	64	asprintf_str_write,
65	asprintf_wstr_write,	65	asprintf_wstr_write,
66	NULL	66	NULL
67	};	67	};
68		68
69	va_list args;	69	va_list args;
70	va_start(args, fmt);	70	va_start(args, fmt);
71		71
72	int ret = printf_core(fmt, &ps, args);	72	int ret = printf_core(fmt, &ps, args);
73	va_end(args);	73	va_end(args);
74		74
75	if (ret > 0) {	75	if (ret > 0) {
76	*strp = malloc(STR_BOUNDS(ret) + 1);	76	*strp = malloc(STR_BOUNDS(ret) + 1);
77	if (*strp == NULL)	77	if (*strp == NULL)
78	return -1;	78	return -1;
79		79
80	va_start(args, fmt);	80	va_start(args, fmt);
81	vsnprintf(*strp, STR_BOUNDS(ret) + 1, fmt, args);	81	vsnprintf(*strp, STR_BOUNDS(ret) + 1, fmt, args);
82	va_end(args);	82	va_end(args);
83	}	83	}
84		84
85	return ret;	85	return ret;
86	}	86	}
87		87
88	/** @}	88	/** @}
89	*/	89	*/
90		90

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(root)/branches/arm/uspace/lib/libc/generic/io/asprintf.c @ 4739 – Rev 4482 → 4647