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Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-number.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-src/src/hb-number.cc | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-number.cc b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-number.cc new file mode 100644 index 00000000000..4f84d4ad5cd --- /dev/null +++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-number.cc @@ -0,0 +1,147 @@ +/* + * Copyright © 2019 Ebrahim Byagowi + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + */ + +#include "hb.hh" +#include "hb-machinery.hh" +#include "hb-number-parser.hh" + +#include <locale.h> +#ifdef HAVE_XLOCALE_H +#include <xlocale.h> +#endif + +template<typename T, typename Func> +static bool +_parse_number (const char **pp, const char *end, T *pv, + bool whole_buffer, Func f) +{ + char buf[32]; + unsigned int len = hb_min (ARRAY_LENGTH (buf) - 1, + (unsigned int) (end - *pp)); + strncpy (buf, *pp, len); + buf[len] = '\0'; + + char *p = buf; + char *pend = p; + + errno = 0; + *pv = f (p, &pend); + if (unlikely (errno || p == pend || + /* Check if consumed whole buffer if is requested */ + (whole_buffer && pend - p != end - *pp))) return false; + + *pp += pend - p; + return true; +} + +bool +hb_parse_int (const char **pp, const char *end, int *pv, bool whole_buffer) +{ + return _parse_number<int> (pp, end, pv, whole_buffer, + [] (const char *p, char **end) + { return strtol (p, end, 10); }); +} + +bool +hb_parse_uint (const char **pp, const char *end, unsigned int *pv, + bool whole_buffer, int base) +{ + return _parse_number<unsigned int> (pp, end, pv, whole_buffer, + [base] (const char *p, char **end) + { return strtoul (p, end, base); }); +} + + +#if defined (HAVE_NEWLOCALE) && defined (HAVE_STRTOD_L) +#define USE_XLOCALE 1 +#define HB_LOCALE_T locale_t +#define HB_CREATE_LOCALE(locName) newlocale (LC_ALL_MASK, locName, nullptr) +#define HB_FREE_LOCALE(loc) freelocale (loc) +#elif defined(_MSC_VER) +#define USE_XLOCALE 1 +#define HB_LOCALE_T _locale_t +#define HB_CREATE_LOCALE(locName) _create_locale (LC_ALL, locName) +#define HB_FREE_LOCALE(loc) _free_locale (loc) +#define strtod_l(a, b, c) _strtod_l ((a), (b), (c)) +#endif + +#ifdef USE_XLOCALE + +#if HB_USE_ATEXIT +static void free_static_C_locale (); +#endif + +static struct hb_C_locale_lazy_loader_t : hb_lazy_loader_t<hb_remove_pointer<HB_LOCALE_T>, + hb_C_locale_lazy_loader_t> +{ + static HB_LOCALE_T create () + { + HB_LOCALE_T C_locale = HB_CREATE_LOCALE ("C"); + +#if HB_USE_ATEXIT + atexit (free_static_C_locale); +#endif + + return C_locale; + } + static void destroy (HB_LOCALE_T p) + { + HB_FREE_LOCALE (p); + } + static HB_LOCALE_T get_null () + { + return nullptr; + } +} static_C_locale; + +#if HB_USE_ATEXIT +static +void free_static_C_locale () +{ + static_C_locale.free_instance (); +} +#endif + +static HB_LOCALE_T +get_C_locale () +{ + return static_C_locale.get_unconst (); +} +#endif /* USE_XLOCALE */ + +bool +hb_parse_double (const char **pp, const char *end, double *pv, + bool whole_buffer) +{ + return _parse_number<double> (pp, end, pv, whole_buffer, + [] (const char *p, char **end) + { +#ifdef USE_XLOCALE + return strtod_l (p, end, get_C_locale ()); +#else + return strtod_rl (p, end); +#endif + }); +} |