1 /*
2 * Copyright (c) 2012 Nicolas George
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "libavutil/avassert.h"
22 #include "libavutil/bprint.c"
23
24 #undef printf
25
bprint_pascal(AVBPrint * b,unsigned size)26 static void bprint_pascal(AVBPrint *b, unsigned size)
27 {
28 unsigned i, j;
29 unsigned p[42];
30
31 av_assert0(size < FF_ARRAY_ELEMS(p));
32
33 p[0] = 1;
34 av_bprintf(b, "%8d\n", 1);
35 for (i = 1; i <= size; i++) {
36 p[i] = 1;
37 for (j = i - 1; j > 0; j--)
38 p[j] = p[j] + p[j - 1];
39 for (j = 0; j <= i; j++)
40 av_bprintf(b, "%8d", p[j]);
41 av_bprintf(b, "\n");
42 }
43 }
44
main(void)45 int main(void)
46 {
47 AVBPrint b;
48 char buf[256];
49 struct tm testtime = { .tm_year = 100, .tm_mon = 11, .tm_mday = 20 };
50
51 av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED);
52 bprint_pascal(&b, 5);
53 printf("Short text in unlimited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
54 printf("%s\n", b.str);
55 av_bprint_finalize(&b, NULL);
56
57 av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED);
58 bprint_pascal(&b, 25);
59 printf("Long text in unlimited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
60 av_bprint_finalize(&b, NULL);
61
62 av_bprint_init(&b, 0, 2048);
63 bprint_pascal(&b, 25);
64 printf("Long text in limited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
65 av_bprint_finalize(&b, NULL);
66
67 av_bprint_init(&b, 0, AV_BPRINT_SIZE_AUTOMATIC);
68 bprint_pascal(&b, 5);
69 printf("Short text in automatic buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
70
71 av_bprint_init(&b, 0, AV_BPRINT_SIZE_AUTOMATIC);
72 bprint_pascal(&b, 25);
73 printf("Long text in automatic buffer: %u/%u\n", (unsigned)strlen(b.str)/8*8, b.len);
74 /* Note that the size of the automatic buffer is arch-dependent. */
75
76 av_bprint_init(&b, 0, AV_BPRINT_SIZE_COUNT_ONLY);
77 bprint_pascal(&b, 25);
78 printf("Long text count only buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
79
80 av_bprint_init_for_buffer(&b, buf, sizeof(buf));
81 bprint_pascal(&b, 25);
82 printf("Long text count only buffer: %u/%u\n", (unsigned)strlen(buf), b.len);
83
84 av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED);
85 av_bprint_strftime(&b, "%Y-%m-%d", &testtime);
86 printf("strftime full: %u/%u \"%s\"\n", (unsigned)strlen(buf), b.len, b.str);
87 av_bprint_finalize(&b, NULL);
88
89 av_bprint_init(&b, 0, 8);
90 av_bprint_strftime(&b, "%Y-%m-%d", &testtime);
91 printf("strftime truncated: %u/%u \"%s\"\n", (unsigned)strlen(buf), b.len, b.str);
92
93 return 0;
94 }
95