| /* |
| * Copyright (c) 2012 Nicolas George |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/bprint.c" |
| |
| #undef printf |
| |
| static void bprint_pascal(AVBPrint *b, unsigned size) |
| { |
| unsigned i, j; |
| unsigned p[42]; |
| |
| av_assert0(size < FF_ARRAY_ELEMS(p)); |
| |
| p[0] = 1; |
| av_bprintf(b, "%8d\n", 1); |
| for (i = 1; i <= size; i++) { |
| p[i] = 1; |
| for (j = i - 1; j > 0; j--) |
| p[j] = p[j] + p[j - 1]; |
| for (j = 0; j <= i; j++) |
| av_bprintf(b, "%8d", p[j]); |
| av_bprintf(b, "\n"); |
| } |
| } |
| |
| int main(void) |
| { |
| AVBPrint b; |
| char buf[256]; |
| struct tm testtime = { .tm_year = 100, .tm_mon = 11, .tm_mday = 20 }; |
| |
| av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED); |
| bprint_pascal(&b, 5); |
| printf("Short text in unlimited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len); |
| printf("%s\n", b.str); |
| av_bprint_finalize(&b, NULL); |
| |
| av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED); |
| bprint_pascal(&b, 25); |
| printf("Long text in unlimited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len); |
| av_bprint_finalize(&b, NULL); |
| |
| av_bprint_init(&b, 0, 2048); |
| bprint_pascal(&b, 25); |
| printf("Long text in limited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len); |
| av_bprint_finalize(&b, NULL); |
| |
| av_bprint_init(&b, 0, AV_BPRINT_SIZE_AUTOMATIC); |
| bprint_pascal(&b, 5); |
| printf("Short text in automatic buffer: %u/%u\n", (unsigned)strlen(b.str), b.len); |
| |
| av_bprint_init(&b, 0, AV_BPRINT_SIZE_AUTOMATIC); |
| bprint_pascal(&b, 25); |
| printf("Long text in automatic buffer: %u/%u\n", (unsigned)strlen(b.str)/8*8, b.len); |
| /* Note that the size of the automatic buffer is arch-dependent. */ |
| |
| av_bprint_init(&b, 0, AV_BPRINT_SIZE_COUNT_ONLY); |
| bprint_pascal(&b, 25); |
| printf("Long text count only buffer: %u/%u\n", (unsigned)strlen(b.str), b.len); |
| |
| av_bprint_init_for_buffer(&b, buf, sizeof(buf)); |
| bprint_pascal(&b, 25); |
| printf("Long text count only buffer: %u/%u\n", (unsigned)strlen(buf), b.len); |
| |
| av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED); |
| av_bprint_strftime(&b, "%Y-%m-%d", &testtime); |
| printf("strftime full: %u/%u \"%s\"\n", (unsigned)strlen(buf), b.len, b.str); |
| av_bprint_finalize(&b, NULL); |
| |
| av_bprint_init(&b, 0, 8); |
| av_bprint_strftime(&b, "%Y-%m-%d", &testtime); |
| printf("strftime truncated: %u/%u \"%s\"\n", (unsigned)strlen(buf), b.len, b.str); |
| |
| return 0; |
| } |