diff options
Diffstat (limited to 'common/common.c')
| -rw-r--r-- | common/common.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/common/common.c b/common/common.c new file mode 100644 index 0000000000..365a369425 --- /dev/null +++ b/common/common.c @@ -0,0 +1,163 @@ +/* + * This file is part of MPlayer. + * + * MPlayer is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * MPlayer 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with MPlayer; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <libavutil/common.h> + +#include "talloc.h" +#include "bstr/bstr.h" +#include "common/common.h" + +#define appendf(ptr, ...) \ + do {(*(ptr)) = talloc_asprintf_append_buffer(*(ptr), __VA_ARGS__);} while(0) + +// Return a talloc'ed string formatted according to the format string in fmt. +// On error, return NULL. +// Valid formats: +// %H, %h: hour (%H is padded with 0 to two digits) +// %M: minutes from 00-59 (hours are subtracted) +// %m: total minutes (includes hours, unlike %M) +// %S: seconds from 00-59 (minutes and hours are subtracted) +// %s: total seconds (includes hours and minutes) +// %f: like %s, but as float +// %T: milliseconds (000-999) +char *mp_format_time_fmt(const char *fmt, double time) +{ + if (time == MP_NOPTS_VALUE) + return talloc_strdup(NULL, "unknown"); + char *sign = time < 0 ? "-" : ""; + time = time < 0 ? -time : time; + long long int itime = time; + long long int h, m, tm, s; + int ms; + s = itime; + tm = s / 60; + h = s / 3600; + s -= h * 3600; + m = s / 60; + s -= m * 60; + ms = (time - itime) * 1000; + char *res = talloc_strdup(NULL, ""); + while (*fmt) { + if (fmt[0] == '%') { + fmt++; + switch (fmt[0]) { + case 'h': appendf(&res, "%s%lld", sign, h); break; + case 'H': appendf(&res, "%s%02lld", sign, h); break; + case 'm': appendf(&res, "%s%lld", sign, tm); break; + case 'M': appendf(&res, "%02lld", m); break; + case 's': appendf(&res, "%s%lld", sign, itime); break; + case 'S': appendf(&res, "%02lld", s); break; + case 'T': appendf(&res, "%03d", ms); break; + case '%': appendf(&res, "%s", "%"); break; + default: goto error; + } + fmt++; + } else { + appendf(&res, "%c", *fmt); + fmt++; + } + } + return res; +error: + talloc_free(res); + return NULL; +} + +char *mp_format_time(double time, bool fractions) +{ + return mp_format_time_fmt(fractions ? "%H:%M:%S.%T" : "%H:%M:%S", time); +} + +// Set rc to the union of rc and rc2 +void mp_rect_union(struct mp_rect *rc, const struct mp_rect *rc2) +{ + rc->x0 = FFMIN(rc->x0, rc2->x0); + rc->y0 = FFMIN(rc->y0, rc2->y0); + rc->x1 = FFMAX(rc->x1, rc2->x1); + rc->y1 = FFMAX(rc->y1, rc2->y1); +} + +// Set rc to the intersection of rc and src. +// Return false if the result is empty. +bool mp_rect_intersection(struct mp_rect *rc, const struct mp_rect *rc2) +{ + rc->x0 = FFMAX(rc->x0, rc2->x0); + rc->y0 = FFMAX(rc->y0, rc2->y0); + rc->x1 = FFMIN(rc->x1, rc2->x1); + rc->y1 = FFMIN(rc->y1, rc2->y1); + + return rc->x1 > rc->x0 && rc->y1 > rc->y0; +} + +// Encode the unicode codepoint as UTF-8, and append to the end of the +// talloc'ed buffer. +char *mp_append_utf8_buffer(char *buffer, uint32_t codepoint) +{ + char data[8]; + uint8_t tmp; + char *output = data; + PUT_UTF8(codepoint, tmp, *output++ = tmp;); + return talloc_strndup_append_buffer(buffer, data, output - data); +} + +// Parse a C-style escape beginning at code, and append the result to *str +// using talloc. The input string (*code) must point to the first character +// after the initial '\', and after parsing *code is set to the first character +// after the current escape. +// On error, false is returned, and all input remains unchanged. +bool mp_parse_escape(bstr *code, char **str) +{ + if (code->len < 1) + return false; + char replace = 0; + switch (code->start[0]) { + case '"': replace = '"'; break; + case '\\': replace = '\\'; break; + case 'b': replace = '\b'; break; + case 'f': replace = '\f'; break; + case 'n': replace = '\n'; break; + case 'r': replace = '\r'; break; + case 't': replace = '\t'; break; + case 'e': replace = '\x1b'; break; + case '\'': replace = '\''; break; + } + if (replace) { + *str = talloc_strndup_append_buffer(*str, &replace, 1); + *code = bstr_cut(*code, 1); + return true; + } + if (code->start[0] == 'x' && code->len >= 3) { + bstr num = bstr_splice(*code, 1, 3); + char c = bstrtoll(num, &num, 16); + if (!num.len) + return false; + *str = talloc_strndup_append_buffer(*str, &c, 1); + *code = bstr_cut(*code, 3); + return true; + } + if (code->start[0] == 'u' && code->len >= 5) { + bstr num = bstr_splice(*code, 1, 5); + int c = bstrtoll(num, &num, 16); + if (num.len) + return false; + *str = mp_append_utf8_buffer(*str, c); + *code = bstr_cut(*code, 5); + return true; + } + return false; +} |