WebSVN – HelenOS – Diff – /trunk/uspace/lib/libc/generic/io/vprintf.c


/*
 * Copyright (c) 2006 Josef Cejka
 * 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 <unistd.h>
#include <io/printf_core.h>
#include <futex.h>
#include <async.h>
#include <string.h>
 
static atomic_t printf_futex = FUTEX_INITIALIZER;
 
static int vprintf_str_write(const char *str, size_t size, void *stream)
{
    size_t wr = fwrite(str, 1, size, (FILE *) stream);
    return str_nlength(str, wr);
}
 
static int vprintf_wstr_write(const wchar_t *str, size_t size, void *stream)
{
    size_t offset = 0;
    size_t chars = 0;
   
    while (offset < size) {
        if (fputc(str[chars], (FILE *) stream) <= 0)
            break;
       
        chars++;
        offset += sizeof(wchar_t);
    }
   
    return chars;
}
 
/** Print formatted text.
 *
 * @param stream Output stream
 * @param fmt    Format string
 * @param ap     Format parameters
 *
 * \see For more details about format string see printf_core.
 *
 */
int vfprintf(FILE *stream, const char *fmt, va_list ap)
{
    struct printf_spec ps = {
        vprintf_str_write,
        vprintf_wstr_write,
        stream
    };
   
    /*
     * Prevent other threads to execute printf_core()
     */
    futex_down(&printf_futex);
   
    /*
     * Prevent other fibrils of the same thread
     * to execute printf_core()
     */
    async_serialize_start();
   
    int ret = printf_core(fmt, &ps, ap);
   
    async_serialize_end();
    futex_up(&printf_futex);
   
    return ret;
}
 
/** Print formatted text to stdout.
 *
 * @param file Output stream
 * @param fmt  Format string
 * @param ap   Format parameters
 *
 * \see For more details about format string see printf_core.
 *
 */
int vprintf(const char *fmt, va_list ap)
{
    return vfprintf(stdout, fmt, ap);
}
 
/** @}
 */
 

Rev 4482	Rev 4523
1	/*	1	/*
2	* Copyright (c) 2006 Josef Cejka	2	* Copyright (c) 2006 Josef Cejka
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup libc	29	/** @addtogroup libc
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <stdarg.h>	35	#include <stdarg.h>
36	#include <stdio.h>	36	#include <stdio.h>
37	#include <unistd.h>	37	#include <unistd.h>
38	#include <io/printf_core.h>	38	#include <io/printf_core.h>
39	#include <futex.h>	39	#include <futex.h>
40	#include <async.h>	40	#include <async.h>
41	#include <string.h>	41	#include <string.h>
42		42
43	static atomic_t printf_futex = FUTEX_INITIALIZER;	43	static atomic_t printf_futex = FUTEX_INITIALIZER;
44		44
45	static int vprintf_str_write(const char str, size_t size, void stream)	45	static int vprintf_str_write(const char str, size_t size, void stream)
46	{	46	{
47	size_t wr = fwrite(str, 1, size, (FILE *) stream);	47	size_t wr = fwrite(str, 1, size, (FILE *) stream);
48	return str_nlength(str, wr);	48	return str_nlength(str, wr);
49	}	49	}
50		50
51	static int vprintf_wstr_write(const wchar_t str, size_t size, void stream)	51	static int vprintf_wstr_write(const wchar_t str, size_t size, void stream)
52	{	52	{
53	size_t offset = 0;	53	size_t offset = 0;
54	size_t chars = 0;	54	size_t chars = 0;
55		55
56	while (offset < size) {	56	while (offset < size) {
57	if (fputc(str[chars], (FILE *) stream) <= 0)	57	if (fputc(str[chars], (FILE *) stream) <= 0)
58	break;	58	break;
59		59
60	chars++;	60	chars++;
61	offset += sizeof(wchar_t);	61	offset += sizeof(wchar_t);
62	}	62	}
63		63
64	return chars;	64	return chars;
65	}	65	}
66		66
67	/** Print formatted text.	67	/** Print formatted text.
68	*	68	*
69	* @param stream Output stream	69	* @param stream Output stream
70	* @param fmt Format string	70	* @param fmt Format string
71	* @param ap Format parameters	71	* @param ap Format parameters
72	*	72	*
73	* \see For more details about format string see printf_core.	73	* \see For more details about format string see printf_core.
74	*	74	*
75	*/	75	*/
76	int vfprintf(FILE stream, const char fmt, va_list ap)	76	int vfprintf(FILE stream, const char fmt, va_list ap)
77	{	77	{
78	struct printf_spec ps = {	78	struct printf_spec ps = {
79	vprintf_str_write,	79	vprintf_str_write,
80	vprintf_wstr_write,	80	vprintf_wstr_write,
81	stream	81	stream
82	};	82	};
83		83
84	/*	84	/*
85	* Prevent other threads to execute printf_core()	85	* Prevent other threads to execute printf_core()
86	*/	86	*/
87	futex_down(&printf_futex);	87	futex_down(&printf_futex);
88		88
89	/*	89	/*
90	* Prevent other pseudo threads of the same thread	90	* Prevent other fibrils of the same thread
91	* to execute printf_core()	91	* to execute printf_core()
92	*/	92	*/
93	async_serialize_start();	93	async_serialize_start();
94		94
95	int ret = printf_core(fmt, &ps, ap);	95	int ret = printf_core(fmt, &ps, ap);
96		96
97	async_serialize_end();	97	async_serialize_end();
98	futex_up(&printf_futex);	98	futex_up(&printf_futex);
99		99
100	return ret;	100	return ret;
101	}	101	}
102		102
103	/** Print formatted text to stdout.	103	/** Print formatted text to stdout.
104	*	104	*
105	* @param file Output stream	105	* @param file Output stream
106	* @param fmt Format string	106	* @param fmt Format string
107	* @param ap Format parameters	107	* @param ap Format parameters
108	*	108	*
109	* \see For more details about format string see printf_core.	109	* \see For more details about format string see printf_core.
110	*	110	*
111	*/	111	*/
112	int vprintf(const char *fmt, va_list ap)	112	int vprintf(const char *fmt, va_list ap)
113	{	113	{
114	return vfprintf(stdout, fmt, ap);	114	return vfprintf(stdout, fmt, ap);
115	}	115	}
116		116
117	/** @}	117	/** @}
118	*/	118	*/
119		119

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/io/vprintf.c @ 3331 – Rev 4482 → 4523