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