Subversion Repositories HelenOS

Rev

Rev 4055 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1234 cejka 1
/*
2071 jermar 2
 * Copyright (c) 2006 Josef Cejka
3348 jermar 3
 * Copyright (c) 2008 Jakub Jermar
1234 cejka 4
 * All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 *
10
 * - Redistributions of source code must retain the above copyright
11
 *   notice, this list of conditions and the following disclaimer.
12
 * - Redistributions in binary form must reproduce the above copyright
13
 *   notice, this list of conditions and the following disclaimer in the
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
16
 *   derived from this software without specific prior written permission.
17
 *
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
20
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
27
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
 */
29
 
1866 jermar 30
/** @addtogroup libc
1653 cejka 31
 * @{
32
 */
33
/** @file
34
 */
35
 
1234 cejka 36
#include <stdarg.h>
37
#include <stdio.h>
3348 jermar 38
#include <stdlib.h>
4537 trochtova 39
#include <string.h>
1234 cejka 40
#include <io/printf_core.h>
41
 
4537 trochtova 42
static int asprintf_str_write(const char *str, size_t count, void *unused)
1234 cejka 43
{
4537 trochtova 44
    return str_nlength(str, count);
1234 cejka 45
}
46
 
4537 trochtova 47
static int asprintf_wstr_write(const wchar_t *str, size_t count, void *unused)
48
{
49
    return wstr_nlength(str, count);
50
}
51
 
3351 jermar 52
/** Allocate and print to string.
53
 *
4537 trochtova 54
 * @param strp Address of the pointer where to store the address of
55
 *             the newly allocated string.
56
 * @fmt        Format string.
3351 jermar 57
 *
4537 trochtova 58
 * @return Number of characters printed or a negative error code.
59
 *
3351 jermar 60
 */
3348 jermar 61
int asprintf(char **strp, const char *fmt, ...)
1234 cejka 62
{
2230 jermar 63
    struct printf_spec ps = {
4537 trochtova 64
        asprintf_str_write,
65
        asprintf_wstr_write,
66
        NULL
2230 jermar 67
    };
4537 trochtova 68
 
3348 jermar 69
    va_list args;
70
    va_start(args, fmt);
4537 trochtova 71
 
72
    int ret = printf_core(fmt, &ps, args);
3348 jermar 73
    va_end(args);
4537 trochtova 74
 
3348 jermar 75
    if (ret > 0) {
4537 trochtova 76
        *strp = malloc(STR_BOUNDS(ret) + 1);
77
        if (*strp == NULL)
3348 jermar 78
            return -1;
4537 trochtova 79
 
3348 jermar 80
        va_start(args, fmt);
4537 trochtova 81
        vsnprintf(*strp, STR_BOUNDS(ret) + 1, fmt, args);
82
        va_end(args);
3348 jermar 83
    }
4537 trochtova 84
 
2209 decky 85
    return ret;
1234 cejka 86
}
87
 
1866 jermar 88
/** @}
1653 cejka 89
 */