diff options
Diffstat (limited to 'core/mp_common.c')
-rw-r--r-- | core/mp_common.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/core/mp_common.c b/core/mp_common.c index 611cb22bcf..03e3e988fd 100644 --- a/core/mp_common.c +++ b/core/mp_common.c @@ -19,6 +19,7 @@ #include <libavutil/common.h> #include "talloc.h" +#include "core/bstr.h" #include "core/mp_common.h" char *mp_format_time(double time, bool fractions) @@ -64,3 +65,61 @@ bool mp_rect_intersection(struct mp_rect *rc, const struct mp_rect *rc2) 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; +} |