display a-z index for module search and some fixes

[ccan] / ccan / string / string.h

diff --git a/ccan/string/string.h b/ccan/string/string.h
index f4997c69adbef7c08561040c64586235c2892ec2..3bc7adfd006f034b037e9beea06b200bc51be392 100644 (file)
--- a/ccan/string/string.h
+++ b/ccan/string/string.h
@@ -43,4 +43,117 @@ static inline bool strends(const char *str, const char *postfix)
 
        return streq(str + strlen(str) - strlen(postfix), postfix);
 }
+
+/**
+ * strsplit - Split string into an array of substrings
+ * @ctx: the context to tallocate from (often NULL)
+ * @string: the string to split
+ * @delims: delimiters where lines should be split.
+ * @nump: optional pointer to place resulting number of lines
+ *
+ * This function splits a single string into multiple strings.  The
+ * original string is untouched: an array is allocated (using talloc)
+ * pointing to copies of each substring.  Multiple delimiters result
+ * in empty substrings.  By definition, no delimiters will appear in
+ * the substrings.
+ *
+ * The final char * in the array will be NULL, so you can use this or
+ * @nump to find the array length.
+ *
+ * Example:
+ *     unsigned int count_long_lines(const char *text)
+ *     {
+ *             char **lines;
+ *             unsigned int i, long_lines = 0;
+ *
+ *             // Can only fail on out-of-memory.
+ *             lines = strsplit(NULL, string, "\n", NULL);
+ *             for (i = 0; lines[i] != NULL; i++)
+ *                     if (strlen(lines[i]) > 80)
+ *                             long_lines++;
+ *             talloc_free(lines);
+ *             return long_lines;
+ *     }
+ */
+char **strsplit(const void *ctx, const char *string, const char *delims,
+                unsigned int *nump);
+
+/**
+ * strjoin - Join an array of substrings into one long string
+ * @ctx: the context to tallocate from (often NULL)
+ * @strings: the NULL-terminated array of strings to join
+ * @delim: the delimiter to insert between the strings
+ *
+ * This function joins an array of strings into a single string.  The
+ * return value is allocated using talloc.  Each string in @strings is
+ * followed by a copy of @delim.
+ *
+ * Example:
+ *     // Append the string "--EOL" to each line.
+ *     char *append_to_all_lines(const char *string)
+ *     {
+ *             char **lines, *ret;
+ *             unsigned int i, num, newnum;
+ *
+ *             lines = strsplit(NULL, string, "\n", NULL);
+ *             ret = strjoin(NULL, lines, "-- EOL\n");
+ *             talloc_free(lines);
+ *             return ret;
+ *     }
+ */
+char *strjoin(const void *ctx, char *strings[], const char *delim);
+
+/**
+ * grab_fd - read all of a file descriptor into memory
+ * @ctx: the context to tallocate from (often NULL)
+ * @fd: the file descriptor to read from
+ * @size: the (optional) size of the file
+ *
+ * This function reads from the given file descriptor until no more
+ * input is available.  The content is talloced off @ctx, and the size
+ * of the file places in @size if it's non-NULL.  For convenience, the
+ * byte after the end of the content will always be NUL.
+ *
+ * Example:
+ *     // Return all of standard input, as lines.
+ *     char **read_as_lines(void)
+ *     {
+ *             char **lines, *all;
+ *
+ *             all = grab_fd(NULL, 0, NULL);
+ *             if (!all)
+ *                     return NULL;
+ *             lines = strsplit(NULL, all, "\n", NULL);
+ *             talloc_free(all);
+ *             return lines;
+ *     }
+ */
+void *grab_fd(const void *ctx, int fd, size_t *size);
+
+/**
+ * grab_file - read all of a file (or stdin) into memory
+ * @ctx: the context to tallocate from (often NULL)
+ * @filename: the file to read (NULL for stdin)
+ * @size: the (optional) size of the file
+ *
+ * This function reads from the given file until no more input is
+ * available.  The content is talloced off @ctx, and the size of the
+ * file places in @size if it's non-NULL.  For convenience, the byte
+ * after the end of the content will always be NUL.
+ *
+ * Example:
+ *     // Return all of a given file, as lines.
+ *     char **read_as_lines(const char *filename)
+ *     {
+ *             char **lines, *all;
+ *
+ *             all = grab_file(NULL, filename, NULL);
+ *             if (!all)
+ *                     return NULL;
+ *             lines = strsplit(NULL, all, "\n", NULL);
+ *             talloc_free(all);
+ *             return lines;
+ *     }
+ */
+void *grab_file(const void *ctx, const char *filename, size_t *size);
 #endif /* CCAN_STRING_H */