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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 <io/printf_core.h> |
39 | #include <io/printf_core.h> |
40 | 40 | ||
41 | static int asprintf_prewrite(const char *str, size_t count, void *unused) |
41 | static int asprintf_prewrite(const char *str, size_t count, void *unused) |
42 | { |
42 | { |
43 | return count; |
43 | return count; |
44 | } |
44 | } |
45 | 45 | ||
46 | /** Allocate and print to string. |
46 | /** Allocate and print to string. |
47 | * |
47 | * |
48 | * @param strp Address of the pointer where to store the address of |
48 | * @param strp Address of the pointer where to store the address of |
49 | * the newly allocated string. |
49 | * the newly allocated string. |
50 | * @fmt Format strin. |
50 | * @fmt Format strin. |
51 | * |
51 | * |
52 | * @return Number of characters printed or a negative error code. |
52 | * @return Number of characters printed or a negative error code. |
53 | */ |
53 | */ |
54 | int asprintf(char **strp, const char *fmt, ...) |
54 | int asprintf(char **strp, const char *fmt, ...) |
55 | { |
55 | { |
56 | struct printf_spec ps = { |
56 | struct printf_spec ps = { |
57 | asprintf_prewrite, |
57 | asprintf_prewrite, |
58 | NULL |
58 | NULL |
59 | }; |
59 | }; |
60 | int ret; |
60 | int ret; |
61 | va_list args; |
61 | va_list args; |
62 | 62 | ||
63 | va_start(args, fmt); |
63 | va_start(args, fmt); |
64 | ret = printf_core(fmt, &ps, args); |
64 | ret = printf_core(fmt, &ps, args); |
65 | va_end(args); |
65 | va_end(args); |
66 | if (ret > 0) { |
66 | if (ret > 0) { |
67 | *strp = malloc(ret + 20); |
67 | *strp = malloc(ret + 20); |
68 | if (!*strp) |
68 | if (!*strp) |
69 | return -1; |
69 | return -1; |
70 | va_start(args, fmt); |
70 | va_start(args, fmt); |
71 | vsprintf(*strp, fmt, args); |
71 | vsprintf(*strp, fmt, args); |
72 | va_end(args); |
72 | va_end(args); |
73 | } |
73 | } |
74 | 74 | ||
75 | return ret; |
75 | return ret; |
76 | } |
76 | } |
77 | 77 | ||
78 | /** @} |
78 | /** @} |
79 | */ |
79 | */ |
80 | 80 |