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Diffstat (limited to 'utils/findresource.c')
-rw-r--r-- | utils/findresource.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/utils/findresource.c b/utils/findresource.c new file mode 100644 index 000000000..828b73276 --- /dev/null +++ b/utils/findresource.c @@ -0,0 +1,210 @@ +/* + * Copyright 2010 Vincent Sanders <vince@kyllikki.org> + * + * This file is part of NetSurf, http://www.netsurf-browser.org/ + * + * NetSurf is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * NetSurf 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/** \file + * Provides utility functions for finding readable files. + * + * These functions are intended to make finding resource files more straightforward. + */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <stdarg.h> +#include <malloc.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> + +#include "utils/findresource.h" + +#define MAX_RESPATH 128 /* maximum number of elements in the resource vector */ + +/* exported interface documented in findresource.h */ +char *vsfindfile(char *str, const char *format, va_list ap) +{ + char *realpathname; + char *pathname; + int len; + + pathname = malloc(PATH_MAX); + if (pathname == NULL) + return NULL; /* unable to allocate memory */ + + len = vsnprintf(pathname, PATH_MAX, format, ap); + + if ((len < 0) || (len >= PATH_MAX)) { + /* error or output exceeded PATH_MAX length so + * operation is doomed to fail. + */ + free(pathname); + return NULL; + } + + realpathname = realpath(pathname, str); + + free(pathname); + + if (realpathname != NULL) { + /* sucessfully expanded pathname */ + if (access(realpathname, R_OK) != 0) { + /* unable to read the file */ + return NULL; + } + } + + return realpathname; +} + +/* exported interface documented in findresource.h */ +char *sfindfile(char *str, const char *format, ...) +{ + va_list ap; + char *ret; + + va_start(ap, format); + ret = vsfindfile(str, format, ap); + va_end(ap); + + return ret; +} + +/* exported interface documented in findresource.h */ +char *findfile(const char *format, ...) +{ + char *str; + char *ret; + va_list ap; + + str = malloc(PATH_MAX); + if (str == NULL) + return NULL; /* unable to allocate memory */ + + va_start(ap, format); + ret = vsfindfile(str, format, ap); + va_end(ap); + + if (ret == NULL) + free(str); + + return ret; +} + +/* exported interface documented in findresource.h */ +char *sfindresource(char **respathv, char *filepath, const char *filename) +{ + int respathc = 0; + + if ((respathv == NULL) || (respathv[0] == NULL) || (filepath == NULL)) + return NULL; + + while (respathv[respathc] != NULL) { + if (sfindfile(filepath, "%s/%s", respathv[respathc], filename) != NULL) + return filepath; + + respathc++; + } + + return NULL; +} + +/* exported interface documented in findresource.h */ +char *findresource(char **respathv, const char *filename) +{ + char *ret; + char *filepath; + + if ((respathv == NULL) || (respathv[0] == NULL)) + return NULL; + + filepath = malloc(PATH_MAX); + if (filepath == NULL) + return NULL; + + ret = sfindresource(respathv, filepath, filename); + + if (ret == NULL) + free(filepath); + + return ret; +} + +/* exported interface documented in findresource.h */ +char *sfindresourcedef(char **respathv, char *filepath, const char *filename, const char *def) +{ + char t[PATH_MAX]; + char *ret; + + if ((respathv == NULL) || (respathv[0] == NULL) || (filepath == NULL)) + return NULL; + + ret = sfindresource(respathv, filepath, filename); + + if ((ret == NULL) && + (def != NULL)) { + /* search failed, return the path specified */ + ret = filepath; + if (def[0] == '~') { + snprintf(t, PATH_MAX, "%s/%s/%s", getenv("HOME"), def + 1, filename); + } else { + snprintf(t, PATH_MAX, "%s/%s", def, filename); + } + if (realpath(t, ret) == NULL) { + strcpy(ret, t); + } + + } + return ret; +} + + +/* exported interface documented in findresource.h */ +char ** +findresource_generate(char * const *pathv, const char * const *langv) +{ + char **respath; /* resource paths vector */ + int pathc = 0; + int langc = 0; + int respathc = 0; + struct stat dstat; + char tmppath[PATH_MAX]; + + respath = calloc(MAX_RESPATH, sizeof(char *)); + + while (pathv[pathc] != NULL) { + if ((stat(pathv[pathc], &dstat) == 0) && + S_ISDIR(dstat.st_mode)) { + /* path element exists and is a directory */ + langc = 0; + while (langv[langc] != NULL) { + snprintf(tmppath, PATH_MAX,"%s/%s",pathv[pathc],langv[langc]); + if ((stat(tmppath, &dstat) == 0) && + S_ISDIR(dstat.st_mode)) { + /* path element exists and is a directory */ + respath[respathc++] = strdup(tmppath); + } + langc++; + } + respath[respathc++] = strdup(pathv[pathc]); + } + pathc++; + } + + return respath; +} |