-enum {
- PORTABILITY_NONE = 0x00,
- PORTABILITY_UNKNOWN = 0x01,
- PORTABILITY_DRIVE = 0x02,
- PORTABILITY_CASE = 0x04,
-};
-
-static mono_once_t options_once = MONO_ONCE_INIT;
-static int portability_helpers = PORTABILITY_UNKNOWN;
-
-static void options_init (void)
-{
- const gchar *env;
-
- portability_helpers = PORTABILITY_NONE;
-
- env = g_getenv ("MONO_IO_PORTABILITY_HELP");
- if (env != NULL) {
- /* parse the environment setting and set up some vars
- * here
- */
- gchar **options = g_strsplit (env, ":", 0);
- int i;
-
- if (options == NULL) {
- /* This shouldn't happen */
- return;
- }
-
- for (i = 0; options[i] != NULL; i++) {
-#ifdef DEBUG
- g_message ("%s: Setting option [%s]", __func__,
- options[i]);
-#endif
- if (!strncasecmp (options[i], "drive", 5)) {
- portability_helpers |= PORTABILITY_DRIVE;
- } else if (!strncasecmp (options[i], "case", 4)) {
- portability_helpers |= PORTABILITY_CASE;
- } else if (!strncasecmp (options[i], "all", 3)) {
- portability_helpers |= (PORTABILITY_DRIVE |
- PORTABILITY_CASE);
- }
- }
- }
-}
-
-/* Returns newly allocated string, or NULL on failure */
-static gchar *find_in_dir (DIR *current, const gchar *name)
-{
- struct dirent *entry;
-
-#ifdef DEBUG
- g_message ("%s: looking for [%s]\n", __func__, name);
-#endif
-
- while((entry = readdir (current)) != NULL) {
-#ifdef DEBUGX
- g_message ("%s: found [%s]\n", __func__, entry->d_name);
-#endif
-
- if (!g_ascii_strcasecmp (name, entry->d_name)) {
-#ifdef DEBUG
- g_message ("%s: matched [%s] to [%s]\n", __func__,
- entry->d_name, name);
-#endif
-
- closedir (current);
- return(g_strdup (entry->d_name));
- }
- }
-
-#ifdef DEBUG
- g_message ("%s: returning NULL\n", __func__);
-#endif
-
- closedir (current);
-
- return(NULL);
-}
-
-/* Returns newly-allocated string or NULL on failure */
-static gchar *find_file (const gchar *pathname, gboolean last_exists)
-{
- gchar *new_pathname, **components, **new_components;
- int num_components = 0, component = 0;
- DIR *scanning;
-
- mono_once (&options_once, options_init);
-
- if (portability_helpers == PORTABILITY_NONE) {
- return(NULL);
- }
-
- new_pathname = g_strdup (pathname);
-
-#ifdef DEBUG
- g_message ("%s: Finding [%s] last_exists: %s\n", __func__, pathname,
- last_exists?"TRUE":"FALSE");
-#endif
-
- if (last_exists &&
- access (new_pathname, F_OK) == 0) {
-#ifdef DEBUG
- g_message ("%s: Found it without doing anything\n", __func__);
-#endif
- return(new_pathname);
- }
-
- /* First turn '\' into '/' and strip any drive letters */
- g_strdelimit (new_pathname, "\\", '/');
-
-#ifdef DEBUG
- g_message ("%s: Fixed slashes, now have [%s]\n", __func__,
- new_pathname);
-#endif
-
- if (portability_helpers & PORTABILITY_DRIVE &&
- g_ascii_isalpha (new_pathname[0]) &&
- (new_pathname[1] == ':')) {
- int len = strlen (new_pathname);
-
- g_memmove (new_pathname, new_pathname+2, len - 2);
- new_pathname[len - 2] = '\0';
-
-#ifdef DEBUG
- g_message ("%s: Stripped drive letter, now looking for [%s]\n",
- __func__, new_pathname);
-#endif
- }
-
- if (last_exists &&
- access (new_pathname, F_OK) == 0) {
-#ifdef DEBUG
- g_message ("%s: Found it\n", __func__);
-#endif
-
- return(new_pathname);
- }
-
- /* OK, have to work harder. Take each path component in turn
- * and do a case-insensitive directory scan for it
- */
-
- if (!(portability_helpers & PORTABILITY_CASE)) {
- g_free (new_pathname);
- return(NULL);
- }
-
- components = g_strsplit (new_pathname, "/", 0);
- if (components == NULL) {
- /* This shouldn't happen */
- g_free (new_pathname);
- return(NULL);
- }
-
- while(components[num_components] != NULL) {
- num_components++;
- }
- g_assert (num_components > 0);
-
- g_free (new_pathname);
-
- new_components = (gchar **)g_new0 (gchar **, num_components + 1);
-
- if (num_components > 1) {
- if (strcmp (components[0], "") == 0) {
- /* first component blank, so start at / */
- scanning = opendir ("/");
- if (scanning == NULL) {
-#ifdef DEBUG
- g_message ("%s: opendir 1 error: %s", __func__,
- g_strerror (errno));
-#endif
- g_strfreev (new_components);
- g_strfreev (components);
- return(NULL);
- }
-
- new_components[component++] = g_strdup ("");
- } else {
- DIR *current;
- gchar *entry;
-
- current = opendir (".");
- if (current == NULL) {
-#ifdef DEBUG
- g_message ("%s: opendir 2 error: %s", __func__,
- g_strerror (errno));
-#endif
- g_strfreev (new_components);
- g_strfreev (components);
- return(NULL);
- }
-
- entry = find_in_dir (current, components[0]);
- if (entry == NULL) {
- g_strfreev (new_components);
- g_strfreev (components);
- return(NULL);
- }
-
- scanning = opendir (entry);
- if (scanning == NULL) {
-#ifdef DEBUG
- g_message ("%s: opendir 3 error: %s", __func__,
- g_strerror (errno));
-#endif
- g_free (entry);
- g_strfreev (new_components);
- g_strfreev (components);
- return(NULL);
- }
-
- new_components[component++] = entry;
- }
- } else {
- if (last_exists) {
- if (strcmp (components[0], "") == 0) {
- /* First and only component blank */
- new_components[component++] = g_strdup ("");
- } else {
- DIR *current;
- gchar *entry;
-
- current = opendir (".");
- if (current == NULL) {
-#ifdef DEBUG
- g_message ("%s: opendir 4 error: %s",
- __func__,
- g_strerror (errno));
-#endif
- g_strfreev (new_components);
- g_strfreev (components);
- return(NULL);
- }
-
- entry = find_in_dir (current, components[0]);
- if (entry == NULL) {
- g_strfreev (new_components);
- g_strfreev (components);
- return(NULL);
- }
-
- new_components[component++] = entry;
- }
- } else {
- new_components[component++] = g_strdup (components[0]);
- }
- }
-
-#ifdef DEBUG
- g_message ("%s: Got first entry: [%s]\n", __func__, new_components[0]);
-#endif
-
- g_assert (component == 1);
-
- for(; component < num_components; component++) {
- gchar *entry;
- gchar *path_so_far;
-
- if (!last_exists &&
- component == num_components -1) {
- entry = g_strdup (components[component]);
- closedir (scanning);
- } else {
- entry = find_in_dir (scanning, components[component]);
- if (entry == NULL) {
- g_strfreev (new_components);
- g_strfreev (components);
- return(NULL);
- }
- }
-
- new_components[component] = entry;
-
- if (component < num_components -1) {
- path_so_far = g_strjoinv ("/", new_components);
-
- scanning = opendir (path_so_far);
- g_free (path_so_far);
- if (scanning == NULL) {
- g_strfreev (new_components);
- g_strfreev (components);
- return(NULL);
- }
- }
- }
-
- g_strfreev (components);
-
- new_pathname = g_strjoinv ("/", new_components);
-
-#ifdef DEBUG
- g_message ("%s: pathname [%s] became [%s]\n", __func__, pathname,
- new_pathname);
-#endif
-
- g_strfreev (new_components);
-
- if ((last_exists &&
- access (new_pathname, F_OK) == 0) ||
- (!last_exists)) {
- return(new_pathname);
- }
-
- g_free (new_pathname);
- return(NULL);
-}
-