Subversion Repositories HelenOS

Rev

Rev 3386 | 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>
4581 mejdrech 39 
#include <string.h>
1234 cejka 40 
#include <io/printf_core.h>
41 
 
4581 mejdrech 42 
static int asprintf_str_write(const char *str, size_t count, void *unused)
1234 cejka 43 
{
4581 mejdrech 44 
    return str_nlength(str, count);
1234 cejka 45 
}
46 
 
4581 mejdrech 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 
 *
4581 mejdrech 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 
 *
4581 mejdrech 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 = {
4581 mejdrech 64 
        asprintf_str_write,
65 
        asprintf_wstr_write,
66 
        NULL
2230 jermar 67 
    };
4581 mejdrech 68 
 
3348 jermar 69 
    va_list args;
70 
    va_start(args, fmt);
4581 mejdrech 71 
 
72 
    int ret = printf_core(fmt, &ps, args);
3348 jermar 73 
    va_end(args);
4581 mejdrech 74 
 
3348 jermar 75 
    if (ret > 0) {
4581 mejdrech 76 
        *strp = malloc(STR_BOUNDS(ret) + 1);
77 
        if (*strp == NULL)
3348 jermar 78 
            return -1;
4581 mejdrech 79 
 
3348 jermar 80 
        va_start(args, fmt);
4581 mejdrech 81 
        vsnprintf(*strp, STR_BOUNDS(ret) + 1, fmt, args);
82 
        va_end(args);
3348 jermar 83 
    }
4581 mejdrech 84 
 
2209 decky 85 
    return ret;
1234 cejka 86 
}
87 
 
1866 jermar 88 
/** @}
1653 cejka 89 
 */