+/* Licensed under LGPLv2.1+ - see LICENSE file for details */
#ifndef CCAN_STR_TALLOC_H
#define CCAN_STR_TALLOC_H
#include <string.h>
* @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)
* 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.
+ * The final char * in the array will be NULL, talloc_array_length() of the
+ * returned value is 1 greater than the number of valid elements in
+ * the array.
*
* Example:
- * unsigned int count_long_lines(const char *text)
+ * #include <ccan/talloc/talloc.h>
+ * #include <ccan/str_talloc/str_talloc.h>
+ * ...
+ * static unsigned int count_long_lines(const char *string)
* {
* char **lines;
* unsigned int i, long_lines = 0;
*
* // Can only fail on out-of-memory.
- * lines = strsplit(NULL, string, "\n", NULL);
+ * lines = strsplit(NULL, string, "\n");
* for (i = 0; lines[i] != NULL; i++)
* if (strlen(lines[i]) > 80)
* long_lines++;
* return long_lines;
* }
*/
-char **strsplit(const void *ctx, const char *string, const char *delims,
- unsigned int *nump);
+char **strsplit(const void *ctx, const char *string, const char *delims);
/**
* strjoin - Join an array of substrings into one long string
*
* Example:
* // Append the string "--EOL" to each line.
- * char *append_to_all_lines(const char *string)
+ * static char *append_to_all_lines(const char *string)
* {
* char **lines, *ret;
- * unsigned int i, num, newnum;
*
- * lines = strsplit(NULL, string, "\n", NULL);
+ * lines = strsplit(NULL, string, "\n");
* ret = strjoin(NULL, lines, "-- EOL\n");
* talloc_free(lines);
* return ret;
* }
*/
char *strjoin(const void *ctx, char *strings[], const char *delim);
+
+/**
+ * strreg - match and extract from a string via (extended) regular expressions.
+ * @ctx: the context to tallocate from (often NULL)
+ * @string: the string to try to match.
+ * @regex: the regular expression to match.
+ * ...: pointers to strings to allocate for subexpressions.
+ *
+ * Returns true if we matched, in which case any parenthesized
+ * expressions in @regex are allocated and placed in the char **
+ * arguments following @regex. NULL arguments mean the match is not
+ * saved. The order of the strings is the order
+ * of opening braces in the expression: in the case of repeated
+ * expressions (eg "([a-z])*") the last one is saved, in the case of
+ * non-existent matches (eg "([a-z]*)?") the pointer is set to NULL.
+ *
+ * Allocation failures or malformed regular expressions return false.
+ *
+ * See Also:
+ * regcomp(3), regex(3).
+ *
+ * Example:
+ * // Given 'My name is Rusty' outputs 'Hello Rusty!'
+ * // Given 'my first name is Rusty Russell' outputs 'Hello Rusty Russell!'
+ * // Given 'My name isnt Rusty Russell' outputs 'Hello there!'
+ * int main(int argc, char *argv[])
+ * {
+ * char *person, *input;
+ *
+ * // Join args and trim trailing space.
+ * input = strjoin(NULL, argv+1, " ");
+ * if (strlen(input) != 0)
+ * input[strlen(input)-1] = '\0';
+ *
+ * if (strreg(NULL, input, "[Mm]y (first )?name is ([A-Za-z ]+)",
+ * NULL, &person))
+ * printf("Hello %s!\n", person);
+ * else
+ * printf("Hello there!\n");
+ * return 0;
+ * }
+ */
+bool strreg(const void *ctx, const char *string, const char *regex, ...);
#endif /* CCAN_STR_TALLOC_H */