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/bprint.c"
22
23 #undef printf
24
bprint_pascal(AVBPrint * b,unsigned size)25 static void bprint_pascal(AVBPrint *b, unsigned size)
26 {
27 unsigned i, j;
28 unsigned p[42];
29
30 av_assert0(size < FF_ARRAY_ELEMS(p));
31
32 p[0] = 1;
33 av_bprintf(b, "%8d\n", 1);
34 for (i = 1; i <= size; i++) {
35 p[i] = 1;
36 for (j = i - 1; j > 0; j--)
37 p[j] = p[j] + p[j - 1];
38 for (j = 0; j <= i; j++)
39 av_bprintf(b, "%8d", p[j]);
40 av_bprintf(b, "\n");
41 }
42 }
43
main(void)44 int main(void)
45 {
46 AVBPrint b;
47 char buf[256];
48 struct tm testtime = { .tm_year = 100, .tm_mon = 11, .tm_mday = 20 };
49
50 av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED);
51 bprint_pascal(&b, 5);
52 printf("Short text in unlimited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
53 printf("%s\n", b.str);
54 av_bprint_finalize(&b, NULL);
55
56 av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED);
57 bprint_pascal(&b, 25);
58 printf("Long text in unlimited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
59 av_bprint_finalize(&b, NULL);
60
61 av_bprint_init(&b, 0, 2048);
62 bprint_pascal(&b, 25);
63 printf("Long text in limited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
64 av_bprint_finalize(&b, NULL);
65
66 av_bprint_init(&b, 0, AV_BPRINT_SIZE_AUTOMATIC);
67 bprint_pascal(&b, 5);
68 printf("Short text in automatic buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
69
70 av_bprint_init(&b, 0, AV_BPRINT_SIZE_AUTOMATIC);
71 bprint_pascal(&b, 25);
72 printf("Long text in automatic buffer: %u/%u\n", (unsigned)strlen(b.str)/8*8, b.len);
73 /* Note that the size of the automatic buffer is arch-dependent. */
74
75 av_bprint_init(&b, 0, AV_BPRINT_SIZE_COUNT_ONLY);
76 bprint_pascal(&b, 25);
77 printf("Long text count only buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
78
79 av_bprint_init_for_buffer(&b, buf, sizeof(buf));
80 bprint_pascal(&b, 25);
81 printf("Long text count only buffer: %u/%u\n", (unsigned)strlen(buf), b.len);
82
83 av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED);
84 av_bprint_strftime(&b, "%Y-%m-%d", &testtime);
85 printf("strftime full: %u/%u \"%s\"\n", (unsigned)strlen(buf), b.len, b.str);
86 av_bprint_finalize(&b, NULL);
87
88 av_bprint_init(&b, 0, 8);
89 av_bprint_strftime(&b, "%Y-%m-%d", &testtime);
90 printf("strftime truncated: %u/%u \"%s\"\n", (unsigned)strlen(buf), b.len, b.str);
91
92 return 0;
93 }
94