Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2019 Ebrahim Byagowi |
| 3 | * |
| 4 | * This is part of HarfBuzz, a text shaping library. |
| 5 | * |
| 6 | * Permission is hereby granted, without written agreement and without |
| 7 | * license or royalty fees, to use, copy, modify, and distribute this |
| 8 | * software and its documentation for any purpose, provided that the |
| 9 | * above copyright notice and the following two paragraphs appear in |
| 10 | * all copies of this software. |
| 11 | * |
| 12 | * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| 13 | * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| 14 | * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| 15 | * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| 16 | * DAMAGE. |
| 17 | * |
| 18 | * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| 19 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| 21 | * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| 22 | * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include "hb.hh" |
Ebrahim Byagowi | 5c8f960 | 2019-12-09 10:48:43 +0330 | [diff] [blame] | 27 | #include "hb-number.hh" |
Ebrahim Byagowi | 9b1d5c4 | 2019-12-09 12:29:28 +0330 | [diff] [blame] | 28 | #include "hb-number-parser.hh" |
Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 29 | |
Ebrahim Byagowi | e2cecf1 | 2019-09-03 15:14:21 +0430 | [diff] [blame] | 30 | template<typename T, typename Func> |
Ebrahim Byagowi | b5e6805 | 2019-09-03 15:23:40 +0430 | [diff] [blame] | 31 | static bool |
Ebrahim Byagowi | 65690b5 | 2019-09-03 23:09:47 +0430 | [diff] [blame] | 32 | _parse_number (const char **pp, const char *end, T *pv, |
| 33 | bool whole_buffer, Func f) |
Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 34 | { |
| 35 | char buf[32]; |
Ebrahim Byagowi | dca8ba6 | 2020-05-10 16:57:45 +0430 | [diff] [blame] | 36 | unsigned len = hb_min (ARRAY_LENGTH (buf) - 1, (unsigned) (end - *pp)); |
Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 37 | strncpy (buf, *pp, len); |
| 38 | buf[len] = '\0'; |
| 39 | |
| 40 | char *p = buf; |
| 41 | char *pend = p; |
Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 42 | |
| 43 | errno = 0; |
Ebrahim Byagowi | b5e6805 | 2019-09-03 15:23:40 +0430 | [diff] [blame] | 44 | *pv = f (p, &pend); |
Ebrahim Byagowi | 65690b5 | 2019-09-03 23:09:47 +0430 | [diff] [blame] | 45 | if (unlikely (errno || p == pend || |
| 46 | /* Check if consumed whole buffer if is requested */ |
Ebrahim Byagowi | dca8ba6 | 2020-05-10 16:57:45 +0430 | [diff] [blame] | 47 | (whole_buffer && pend - p != end - *pp))) |
| 48 | return false; |
Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 49 | |
Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 50 | *pp += pend - p; |
| 51 | return true; |
| 52 | } |
| 53 | |
Ebrahim Byagowi | a77bb7e | 2019-09-03 14:49:14 +0430 | [diff] [blame] | 54 | bool |
Ebrahim Byagowi | 65690b5 | 2019-09-03 23:09:47 +0430 | [diff] [blame] | 55 | hb_parse_int (const char **pp, const char *end, int *pv, bool whole_buffer) |
Ebrahim Byagowi | e2cecf1 | 2019-09-03 15:14:21 +0430 | [diff] [blame] | 56 | { |
Ebrahim Byagowi | 65690b5 | 2019-09-03 23:09:47 +0430 | [diff] [blame] | 57 | return _parse_number<int> (pp, end, pv, whole_buffer, |
| 58 | [] (const char *p, char **end) |
| 59 | { return strtol (p, end, 10); }); |
Ebrahim Byagowi | e2cecf1 | 2019-09-03 15:14:21 +0430 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | bool |
Ebrahim Byagowi | dca8ba6 | 2020-05-10 16:57:45 +0430 | [diff] [blame] | 63 | hb_parse_uint (const char **pp, const char *end, unsigned *pv, |
Ebrahim Byagowi | 65690b5 | 2019-09-03 23:09:47 +0430 | [diff] [blame] | 64 | bool whole_buffer, int base) |
Ebrahim Byagowi | a77bb7e | 2019-09-03 14:49:14 +0430 | [diff] [blame] | 65 | { |
Ebrahim Byagowi | dca8ba6 | 2020-05-10 16:57:45 +0430 | [diff] [blame] | 66 | return _parse_number<unsigned> (pp, end, pv, whole_buffer, |
| 67 | [base] (const char *p, char **end) |
| 68 | { return strtoul (p, end, base); }); |
Ebrahim Byagowi | a77bb7e | 2019-09-03 14:49:14 +0430 | [diff] [blame] | 69 | } |
| 70 | |
Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 71 | bool |
Ebrahim Byagowi | dca8ba6 | 2020-05-10 16:57:45 +0430 | [diff] [blame] | 72 | hb_parse_double (const char **pp, const char *end, double *pv, bool whole_buffer) |
Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 73 | { |
Ebrahim Byagowi | dca8ba6 | 2020-05-10 16:57:45 +0430 | [diff] [blame] | 74 | const char *pend = end; |
| 75 | *pv = strtod_rl (*pp, &pend); |
| 76 | if (unlikely (*pp == pend)) return false; |
| 77 | *pp = pend; |
| 78 | return !whole_buffer || end == pend; |
Ebrahim Byagowi | 43372fb | 2019-09-03 01:02:40 +0430 | [diff] [blame] | 79 | } |