diff options
Diffstat (limited to 'REORG.TODO/locale/loadlocale.c')
| -rw-r--r-- | REORG.TODO/locale/loadlocale.c | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/REORG.TODO/locale/loadlocale.c b/REORG.TODO/locale/loadlocale.c new file mode 100644 index 0000000000..9bca30463e --- /dev/null +++ b/REORG.TODO/locale/loadlocale.c @@ -0,0 +1,309 @@ +/* Functions to read locale data files. + Copyright (C) 1996-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <assert.h> +#include <errno.h> +#include <fcntl.h> +#include <locale.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#ifdef _POSIX_MAPPED_FILES +# include <sys/mman.h> +#endif +#include <sys/stat.h> + +#include <not-cancel.h> +#include "localeinfo.h" + + +static const size_t _nl_category_num_items[] = +{ +#define DEFINE_CATEGORY(category, category_name, items, a) \ + [category] = _NL_ITEM_INDEX (_NL_NUM_##category), +#include "categories.def" +#undef DEFINE_CATEGORY +}; + + +#define NO_PAREN(arg, rest...) arg, ##rest + +#define DEFINE_CATEGORY(category, category_name, items, a) \ +static const enum value_type _nl_value_type_##category[] = { NO_PAREN items }; +#define DEFINE_ELEMENT(element, element_name, optstd, type, rest...) \ + [_NL_ITEM_INDEX (element)] = type, +#include "categories.def" +#undef DEFINE_CATEGORY + +static const enum value_type *const _nl_value_types[] = +{ +#define DEFINE_CATEGORY(category, category_name, items, a) \ + [category] = _nl_value_type_##category, +#include "categories.def" +#undef DEFINE_CATEGORY +}; + + +struct __locale_data * +internal_function +_nl_intern_locale_data (int category, const void *data, size_t datasize) +{ + const struct + { + unsigned int magic; + unsigned int nstrings; + unsigned int strindex[0]; + } *const filedata = data; + struct __locale_data *newdata; + size_t cnt; + + if (__builtin_expect (datasize < sizeof *filedata, 0) + || __builtin_expect (filedata->magic != LIMAGIC (category), 0)) + { + /* Bad data file. */ + __set_errno (EINVAL); + return NULL; + } + + if (__builtin_expect (filedata->nstrings < _nl_category_num_items[category], + 0) + || (__builtin_expect (sizeof *filedata + + filedata->nstrings * sizeof (unsigned int) + >= datasize, 0))) + { + /* Insufficient data. */ + __set_errno (EINVAL); + return NULL; + } + + newdata = malloc (sizeof *newdata + + filedata->nstrings * sizeof (union locale_data_value)); + if (newdata == NULL) + return NULL; + + newdata->filedata = (void *) filedata; + newdata->filesize = datasize; + newdata->private.data = NULL; + newdata->private.cleanup = NULL; + newdata->usage_count = 0; + newdata->use_translit = 0; + newdata->nstrings = filedata->nstrings; + for (cnt = 0; cnt < newdata->nstrings; ++cnt) + { + size_t idx = filedata->strindex[cnt]; + if (__glibc_unlikely (idx > (size_t) newdata->filesize)) + { + puntdata: + free (newdata); + __set_errno (EINVAL); + return NULL; + } + + /* Determine the type. There is one special case: the LC_CTYPE + category can have more elements than there are in the + _nl_value_type_LC_XYZ array. There are all pointers. */ + switch (category) + { +#define CATTEST(cat) \ + case LC_##cat: \ + if (cnt >= (sizeof (_nl_value_type_LC_##cat) \ + / sizeof (_nl_value_type_LC_##cat[0]))) \ + goto puntdata; \ + break + CATTEST (NUMERIC); + CATTEST (TIME); + CATTEST (COLLATE); + CATTEST (MONETARY); + CATTEST (MESSAGES); + CATTEST (PAPER); + CATTEST (NAME); + CATTEST (ADDRESS); + CATTEST (TELEPHONE); + CATTEST (MEASUREMENT); + CATTEST (IDENTIFICATION); + default: + assert (category == LC_CTYPE); + break; + } + + if ((category == LC_CTYPE + && cnt >= (sizeof (_nl_value_type_LC_CTYPE) + / sizeof (_nl_value_type_LC_CTYPE[0]))) + || __builtin_expect (_nl_value_types[category][cnt] != word, 1)) + newdata->values[cnt].string = newdata->filedata + idx; + else + { + if (!LOCFILE_ALIGNED_P (idx)) + goto puntdata; + newdata->values[cnt].word = + *((const u_int32_t *) (newdata->filedata + idx)); + } + } + + return newdata; +} + +void +internal_function +_nl_load_locale (struct loaded_l10nfile *file, int category) +{ + int fd; + void *filedata; + struct stat64 st; + struct __locale_data *newdata; + int save_err; + int alloc = ld_mapped; + + file->decided = 1; + file->data = NULL; + + fd = open_not_cancel_2 (file->filename, O_RDONLY | O_CLOEXEC); + if (__builtin_expect (fd, 0) < 0) + /* Cannot open the file. */ + return; + + if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0) + { + puntfd: + close_not_cancel_no_status (fd); + return; + } + if (__glibc_unlikely (S_ISDIR (st.st_mode))) + { + /* LOCALE/LC_foo is a directory; open LOCALE/LC_foo/SYS_LC_foo + instead. */ + char *newp; + size_t filenamelen; + + close_not_cancel_no_status (fd); + + filenamelen = strlen (file->filename); + newp = (char *) alloca (filenamelen + + 5 + _nl_category_name_sizes[category] + 1); + __mempcpy (__mempcpy (__mempcpy (newp, file->filename, filenamelen), + "/SYS_", 5), + _nl_category_names.str + _nl_category_name_idxs[category], + _nl_category_name_sizes[category] + 1); + + fd = open_not_cancel_2 (newp, O_RDONLY | O_CLOEXEC); + if (__builtin_expect (fd, 0) < 0) + return; + + if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0) + goto puntfd; + } + + /* Map in the file's data. */ + save_err = errno; +#ifdef _POSIX_MAPPED_FILES +# ifndef MAP_COPY + /* Linux seems to lack read-only copy-on-write. */ +# define MAP_COPY MAP_PRIVATE +# endif +# ifndef MAP_FILE + /* Some systems do not have this flag; it is superfluous. */ +# define MAP_FILE 0 +# endif + filedata = __mmap ((caddr_t) 0, st.st_size, + PROT_READ, MAP_FILE|MAP_COPY, fd, 0); + if (__glibc_unlikely (filedata == MAP_FAILED)) + { + filedata = NULL; + if (__builtin_expect (errno, ENOSYS) == ENOSYS) + { +#endif /* _POSIX_MAPPED_FILES */ + /* No mmap; allocate a buffer and read from the file. */ + alloc = ld_malloced; + filedata = malloc (st.st_size); + if (filedata != NULL) + { + off_t to_read = st.st_size; + ssize_t nread; + char *p = (char *) filedata; + while (to_read > 0) + { + nread = read_not_cancel (fd, p, to_read); + if (__builtin_expect (nread, 1) <= 0) + { + free (filedata); + if (nread == 0) + __set_errno (EINVAL); /* Bizarreness going on. */ + goto puntfd; + } + p += nread; + to_read -= nread; + } + __set_errno (save_err); + } +#ifdef _POSIX_MAPPED_FILES + } + } +#endif /* _POSIX_MAPPED_FILES */ + + /* We have mapped the data, so we no longer need the descriptor. */ + close_not_cancel_no_status (fd); + + if (__glibc_unlikely (filedata == NULL)) + /* We failed to map or read the data. */ + return; + + newdata = _nl_intern_locale_data (category, filedata, st.st_size); + if (__glibc_unlikely (newdata == NULL)) + /* Bad data. */ + { +#ifdef _POSIX_MAPPED_FILES + if (alloc == ld_mapped) + __munmap ((caddr_t) filedata, st.st_size); +#endif + return; + } + + /* _nl_intern_locale_data leaves us these fields to initialize. */ + newdata->name = NULL; /* This will be filled if necessary in findlocale.c. */ + newdata->alloc = alloc; + + file->data = newdata; +} + +void +internal_function +_nl_unload_locale (struct __locale_data *locale) +{ + if (locale->private.cleanup) + (*locale->private.cleanup) (locale); + + switch (__builtin_expect (locale->alloc, ld_mapped)) + { + case ld_malloced: + free ((void *) locale->filedata); + break; + case ld_mapped: +#ifdef _POSIX_MAPPED_FILES + __munmap ((caddr_t) locale->filedata, locale->filesize); + break; +#endif + case ld_archive: /* Nothing to do. */ + break; + } + + if (__builtin_expect (locale->alloc, ld_mapped) != ld_archive) + free ((char *) locale->name); + + free (locale); +} |