}
#endif
+enum GNUNET_STRINGS_FilenameCheck
+{
+ GNUNET_STRINGS_CHECK_EXISTS = 0x00000001,
+ GNUNET_STRINGS_CHECK_IS_DIRECTORY = 0x00000002,
+ GNUNET_STRINGS_CHECK_IS_LINK = 0x00000004,
+ GNUNET_STRINGS_CHECK_IS_ABSOLUTE = 0x00000008
+};
+
+/**
+ * Parse a path that might be an URI.
+ *
+ * @param path path to parse. Must be NULL-terminated.
+ * @param scheme_part a pointer to 'char *' where a pointer to a string that
+ * represents the URI scheme will be stored. Can be NULL. The string is
+ * allocated by the function, and should be freed by GNUNET_free() when
+ * it is no longer needed.
+ * @param path_part a pointer to 'const char *' where a pointer to the path
+ * part of the URI will be stored. Can be NULL. Points to the same block
+ * of memory as 'path', and thus must not be freed. Might point to '\0',
+ * if path part is zero-length.
+ * @return GNUNET_YES if it's an URI, GNUNET_NO otherwise. If 'path' is not
+ * an URI, '* scheme_part' and '*path_part' will remain unchanged
+ * (if they weren't NULL).
+ */
+int
+GNUNET_STRINGS_parse_uri (const char *path, char **scheme_part,
+ const char **path_part);
+
+/**
+ * Check whether @filename is absolute or not, and if it's an URI
+ *
+ * @param filename filename to check
+ * @param can_be_uri GNUNET_YES to check for being URI, GNUNET_NO - to
+ * assume it's not URI
+ * @param r_is_uri a pointer to an int that is set to GNUNET_YES if @filename
+ * is URI and to GNUNET_NO otherwise. Can be NULL. If @can_be_uri is
+ * not GNUNET_YES, *r_is_uri is set to GNUNET_NO.
+ * @param r_uri a pointer to a char * that is set to a pointer to URI scheme.
+ * The string is allocated by the function, and should be freed with
+ * GNUNET_free (). Can be NULL.
+ * @return GNUNET_YES if @filaneme is absolute, GNUNET_NO otherwise.
+ */
+int
+GNUNET_STRINGS_path_is_absolute (const char *filename, int can_be_uri,
+ int *r_is_uri, char **r_uri_scheme);
+
+/**
+ * Perform @checks on @filename
+ *
+ * @param filename file to check
+ * @param checks checks to perform
+ * @return GNUNET_YES if all @checks pass, GNUNET_NO if at least one of them
+ * fails, GNUNET_SYSERR when a check can't be performed
+ */
+int
+GNUNET_STRINGS_check_filename (const char *filename,
+ enum GNUNET_STRINGS_FilenameCheck checks);
+
/* ifndef GNUNET_UTIL_STRING_H */
#endif
}
+/**
+ * Parse a path that might be an URI.
+ *
+ * @param path path to parse. Must be NULL-terminated.
+ * @param scheme_part a pointer to 'char *' where a pointer to a string that
+ * represents the URI scheme will be stored. Can be NULL. The string is
+ * allocated by the function, and should be freed by GNUNET_free() when
+ * it is no longer needed.
+ * @param path_part a pointer to 'const char *' where a pointer to the path
+ * part of the URI will be stored. Can be NULL. Points to the same block
+ * of memory as 'path', and thus must not be freed. Might point to '\0',
+ * if path part is zero-length.
+ * @return GNUNET_YES if it's an URI, GNUNET_NO otherwise. If 'path' is not
+ * an URI, '* scheme_part' and '*path_part' will remain unchanged
+ * (if they weren't NULL).
+ */
+int
+GNUNET_STRINGS_parse_uri (const char *path, char **scheme_part,
+ const char **path_part)
+{
+ size_t len;
+ int i, end;
+ int pp_state = 0;
+ const char *post_scheme_part = NULL;
+ len = strlen (path);
+ for (end = 0, i = 0; !end && i < len; i++)
+ {
+ switch (pp_state)
+ {
+ case 0:
+ if (path[i] == ':' && i > 0)
+ {
+ pp_state += 1;
+ continue;
+ }
+ if (!((path[i] >= 'A' && path[i] <= 'Z') || (path[i] >= 'a' && path[i] <= 'z')
+ || (path[i] >= '0' && path[i] <= '9') || path[i] == '+' || path[i] == '-'
+ || (path[i] == '.')))
+ end = 1;
+ break;
+ case 1:
+ case 2:
+ if (path[i] == '/')
+ {
+ pp_state += 1;
+ continue;
+ }
+ end = 1;
+ break;
+ case 3:
+ post_scheme_part = &path[i];
+ end = 1;
+ break;
+ default:
+ end = 1;
+ }
+ }
+ if (post_scheme_part == NULL)
+ return GNUNET_NO;
+ if (scheme_part)
+ {
+ *scheme_part = GNUNET_malloc (post_scheme_part - path + 1);
+ memcpy (*scheme_part, path, post_scheme_part - path);
+ (*scheme_part)[post_scheme_part - path] = '\0';
+ }
+ if (path_part)
+ *path_part = post_scheme_part;
+ return GNUNET_YES;
+}
+
+
+/**
+ * Check whether @filename is absolute or not, and if it's an URI
+ *
+ * @param filename filename to check
+ * @param can_be_uri GNUNET_YES to check for being URI, GNUNET_NO - to
+ * assume it's not URI
+ * @param r_is_uri a pointer to an int that is set to GNUNET_YES if @filename
+ * is URI and to GNUNET_NO otherwise. Can be NULL. If @can_be_uri is
+ * not GNUNET_YES, *r_is_uri is set to GNUNET_NO.
+ * @param r_uri a pointer to a char * that is set to a pointer to URI scheme.
+ * The string is allocated by the function, and should be freed with
+ * GNUNET_free (). Can be NULL.
+ * @return GNUNET_YES if @filaneme is absolute, GNUNET_NO otherwise.
+ */
+int
+GNUNET_STRINGS_path_is_absolute (const char *filename, int can_be_uri,
+ int *r_is_uri, char **r_uri_scheme)
+{
+#if WINDOWS
+ size_t len;
+#endif
+ const char *post_scheme_path;
+ int is_uri;
+ char * uri;
+ /* consider POSIX paths to be absolute too, even on W32,
+ * as plibc expansion will fix them for us.
+ */
+ if (filename[0] == '/')
+ return GNUNET_YES;
+ if (can_be_uri)
+ {
+ is_uri = GNUNET_STRINGS_parse_uri (filename, &uri, &post_scheme_path);
+ if (r_is_uri)
+ *r_is_uri = is_uri;
+ if (is_uri)
+ {
+ if (r_uri_scheme)
+ *r_uri_scheme = uri;
+ else
+ GNUNET_free_non_null (uri);
+#if WINDOWS
+ len = strlen(post_scheme_path);
+ /* Special check for file:///c:/blah
+ * We want to parse 'c:/', not '/c:/'
+ */
+ if (post_scheme_path[0] == '/' && len >= 3 && post_scheme_path[2] == ':')
+ post_scheme_path = &post_scheme_path[1];
+#endif
+ return GNUNET_STRINGS_path_is_absolute (post_scheme_path, GNUNET_NO, NULL, NULL);
+ }
+ }
+ else
+ {
+ is_uri = GNUNET_NO;
+ if (r_is_uri)
+ *r_is_uri = GNUNET_NO;
+ }
+#if WINDOWS
+ len = strlen (filename);
+ if (len >= 3 &&
+ ((filename[0] >= 'A' && filename[0] <= 'Z')
+ || (filename[0] >= 'a' && filename[0] <= 'z'))
+ && filename[1] == ':' && (filename[2] == '/' || filename[2] == '\\'))
+ return GNUNET_YES;
+#endif
+ return GNUNET_NO;
+}
+
+#if MINGW
+#define _IFMT 0170000 /* type of file */
+#define _IFLNK 0120000 /* symbolic link */
+#define S_ISLNK(m) (((m)&_IFMT) == _IFLNK)
+#endif
+
+/**
+ * Perform @checks on @filename
+ *
+ * @param filename file to check
+ * @param checks checks to perform
+ * @return GNUNET_YES if all @checks pass, GNUNET_NO if at least one of them
+ * fails, GNUNET_SYSERR when a check can't be performed
+ */
+int
+GNUNET_STRINGS_check_filename (const char *filename,
+ enum GNUNET_STRINGS_FilenameCheck checks)
+{
+ struct stat st;
+ if (filename == NULL || filename[0] == '\0')
+ return GNUNET_SYSERR;
+ if (checks & GNUNET_STRINGS_CHECK_IS_ABSOLUTE)
+ if (!GNUNET_STRINGS_path_is_absolute (filename, GNUNET_NO, NULL, NULL))
+ return GNUNET_NO;
+ if (checks & (GNUNET_STRINGS_CHECK_EXISTS
+ | GNUNET_STRINGS_CHECK_IS_DIRECTORY
+ | GNUNET_STRINGS_CHECK_IS_LINK))
+ {
+ if (STAT (filename, &st))
+ {
+ if (checks & GNUNET_STRINGS_CHECK_EXISTS)
+ return GNUNET_NO;
+ else
+ return GNUNET_SYSERR;
+ }
+ }
+ if (checks & GNUNET_STRINGS_CHECK_IS_DIRECTORY)
+ if (!S_ISDIR (st.st_mode))
+ return GNUNET_NO;
+ if (checks & GNUNET_STRINGS_CHECK_IS_LINK)
+ if (!S_ISLNK (st.st_mode))
+ return GNUNET_NO;
+ return GNUNET_YES;
+}
/* end of strings.c */
projects / oweals / gnunet.git / commitdiff