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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [locale/] [ldpart.c] - Rev 262
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/* * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/syslimits.h> #include <fcntl.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include "setlocale.h" #include "ldpart.h" static int split_lines(char *, const char *); static void set_from_buf(const char *, int, const char **); int __part_load_locale(const char *name, int *using_locale, char *locale_buf, const char *category_filename, int locale_buf_size_max, int locale_buf_size_min, const char **dst_localebuf) { static char locale_buf_C[] = "C"; static int num_lines; int fd; char *lbuf; char *p; const char *plim; char filename[PATH_MAX]; #ifdef __USE_INTERNAL_STAT64 struct stat64 st; #else struct stat st; #endif size_t namesize; size_t bufsize; int save_using_locale; char *nptr; save_using_locale = *using_locale; *using_locale = 0; if (name == NULL) goto no_locale; if (!strcmp(name, "C") || !strcmp(name, "POSIX")) return 0; /* * If the locale name is the same as our cache, use the cache. */ lbuf = locale_buf; if (lbuf != NULL && strcmp(name, lbuf) == 0) { set_from_buf(lbuf, num_lines, dst_localebuf); *using_locale = 1; return 0; } /* * Slurp the locale file into the cache. */ namesize = strlen(name) + 1; if (!_PathLocale) goto no_locale; /* Range checking not needed, 'name' size is limited */ strcpy(filename, _PathLocale); strcat(filename, "/"); strcat(filename, name); strcat(filename, "/"); strcat(filename, category_filename); fd = open(filename, O_RDONLY); if (fd < 0) goto no_locale; #ifdef __USE_INTERNAL_STAT64 if (fstat64(fd, &st) != 0) #else if (fstat(fd, &st) != 0) #endif goto bad_locale; if (st.st_size <= 0) goto bad_locale; bufsize = namesize + st.st_size; locale_buf = NULL; if (lbuf == NULL || lbuf == locale_buf_C) { lbuf = malloc(bufsize); } else { nptr = realloc(lbuf, bufsize); if (!nptr && lbuf) free (lbuf); lbuf = nptr; } if (lbuf == NULL) goto bad_locale; (void) strcpy(lbuf, name); p = lbuf + namesize; plim = p + st.st_size; if (read(fd, p, (size_t) st.st_size) != st.st_size) goto bad_lbuf; if (close(fd) != 0) goto bad_lbuf; /* * Parse the locale file into localebuf. */ if (plim[-1] != '\n') goto bad_lbuf; num_lines = split_lines(p, plim); if (num_lines >= locale_buf_size_max) num_lines = locale_buf_size_max; else if (num_lines >= locale_buf_size_min) num_lines = locale_buf_size_min; else goto reset_locale; set_from_buf(lbuf, num_lines, dst_localebuf); /* * Record the successful parse in the cache. */ locale_buf = lbuf; *using_locale = 1; return 0; reset_locale: locale_buf = locale_buf_C; save_using_locale = 0; bad_lbuf: free(lbuf); bad_locale: (void)close(fd); no_locale: *using_locale = save_using_locale; return -1; } static int split_lines(char *p, const char *plim) { int i; for (i = 0; p < plim; i++) { p = strchr(p, '\n'); *p++ = '\0'; } return i; } static void set_from_buf(const char *p, int num_lines, const char **dst_localebuf) { const char **ap; int i; for (ap = dst_localebuf, i = 0; i < num_lines; ++ap, ++i) *ap = p += strlen(p) + 1; }
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