From 66f6e9eff5c2b9f0d5c0bcffcfbc93bf2edaa7b3 Mon Sep 17 00:00:00 2001 From: Michael Drake Date: Thu, 17 Mar 2011 11:26:30 +0000 Subject: Rename utils/resource to utils/filepath to avoid confusion with resource: fetcher. svn path=/trunk/netsurf/; revision=12088 --- utils/filepath.c | 310 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 310 insertions(+) create mode 100644 utils/filepath.c (limited to 'utils/filepath.c') diff --git a/utils/filepath.c b/utils/filepath.c new file mode 100644 index 000000000..e2d90bbb7 --- /dev/null +++ b/utils/filepath.c @@ -0,0 +1,310 @@ +/* + * Copyright 2010 Vincent Sanders + * + * 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 . + */ + +/** \file + * Provides utility functions for finding readable files. + * + * These functions are intended to make finding resource files more straightforward. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "utils/config.h" +#include "utils/filepath.h" + +/** maximum number of elements in the resource vector */ +#define MAX_RESPATH 128 + +/* exported interface documented in filepath.h */ +char *filepath_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 filepath.h */ +char *filepath_sfindfile(char *str, const char *format, ...) +{ + va_list ap; + char *ret; + + va_start(ap, format); + ret = filepath_vsfindfile(str, format, ap); + va_end(ap); + + return ret; +} + +/* exported interface documented in filepath.h */ +char *filepath_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 = filepath_vsfindfile(str, format, ap); + va_end(ap); + + if (ret == NULL) + free(str); + + return ret; +} + +/* exported interface documented in filepath.h */ +char *filepath_sfind(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 (filepath_sfindfile(filepath, "%s/%s", respathv[respathc], filename) != NULL) + return filepath; + + respathc++; + } + + return NULL; +} + +/* exported interface documented in filepath.h */ +char *filepath_find(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 = filepath_sfind(respathv, filepath, filename); + + if (ret == NULL) + free(filepath); + + return ret; +} + +/* exported interface documented in filepath.h */ +char *filepath_sfinddef(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 = filepath_sfind(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 filepath.h */ +char ** +filepath_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, sizeof tmppath, "%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; +} + +/* expand ${} in a string into environment variables */ +static char * +expand_path(const char *path) +{ + char *exp = strdup(path); + int explen; + int cstart = -1; + int cloop = 0; + char *envv; + int envlen; + int replen; /* length of replacement */ + + if (exp == NULL) + return NULL; + + explen = strlen(exp) + 1; + + while (exp[cloop] != 0) { + if ((exp[cloop] == '$') && + (exp[cloop + 1] == '{')) { + cstart = cloop; + cloop++; + } + + if ((cstart != -1) && + (exp[cloop] == '}')) { + replen = cloop - cstart; + exp[cloop] = 0; + envv = getenv(exp + cstart + 2); + if (envv == NULL) { + memmove(exp + cstart, + exp + cloop + 1, + explen - cloop - 1); + explen -= replen; + } else { + envlen = strlen(envv); + exp = realloc(exp, explen + envlen - replen); + memmove(exp + cstart + envlen, + exp + cloop + 1, + explen - cloop - 1); + memmove(exp + cstart, envv, envlen); + explen += envlen - replen; + } + cloop -= replen; + cstart = -1; + } + + cloop++; + } + + return exp; +} + +/* exported interface documented in filepath.h */ +char ** +filepath_path_to_strvec(const char *path) +{ + char **strvec; + int strc = 0; + + strvec = calloc(MAX_RESPATH, sizeof(char *)); + if (strvec == NULL) + return NULL; + + strvec[strc] = expand_path(path); + if (strvec[strc] == NULL) { + free(strvec); + return NULL; + } + strc++; + + strvec[strc] = strchr(strvec[0], ':'); + while ((strc < (MAX_RESPATH - 2)) && + (strvec[strc] != NULL)) { + /* null terminate previous entry */ + *strvec[strc] = 0; + strvec[strc]++; + + /* skip colons */ + while (*strvec[strc] == ':') + strvec[strc]++; + + if (*strvec[strc] == 0) + break; /* string is terminated */ + + strc++; + + strvec[strc] = strchr(strvec[strc - 1], ':'); + } + + return strvec; +} + +/* exported interface documented in filepath.h */ +void filepath_free_strvec(char **pathv) +{ + free(pathv[0]); + free(pathv); +} -- cgit v1.2.3