vector: Additional string vector definitions.

ast_vector_string_split:
This function will add items to an ast_vector_string by splitting values
of a string buffer.  Items are appended to the vector in the order they
are found.

ast_vector_const_string:
A vector of 'const char *'.

Change-Id: I1bf02a1efeb2baeea11c59c557d39dd1197494d7

diff --git a/include/asterisk/vector.h b/include/asterisk/vector.h
index 8bd1cef..d1b2973 100644 (file)
--- a/include/asterisk/vector.h
+++ b/include/asterisk/vector.h
@@ -51,8 +51,38 @@
 /*! \brief Integer vector definition */
 AST_VECTOR(ast_vector_int, int);
 
-/*! \brief String vector definition */
+/*! \brief String vector definitions */
 AST_VECTOR(ast_vector_string, char *);
+AST_VECTOR(ast_vector_const_string, const char *);
+
+/*! Options to override default processing of ast_vector_string_split. */
+enum ast_vector_string_split_flags {
+       /*! Do not trim whitespace from values. */
+       AST_VECTOR_STRING_SPLIT_NO_TRIM = 0x01,
+       /*! Append empty strings to the vector. */
+       AST_VECTOR_STRING_SPLIT_ALLOW_EMPTY = 0x02,
+};
+
+/*!
+ * \brief Append a string vector by splitting a string.
+ *
+ * \param dest Pointer to an initialized vector.
+ * \param input String buffer to split.
+ * \param delim String delimeter passed to strsep.
+ * \param flags Processing options defined by \ref enum ast_vector_string_split_flags.
+ * \param excludes_cmp NULL or a function like strcmp to exclude duplicate strings.
+ *
+ * \retval 0 Success
+ * \retval -1 Failure
+ *
+ * \note All elements added to the vector are allocated.  The caller is always
+ *       responsible for calling ast_free on each element in the vector even
+ *       after failure.  It's possible for this function to successfully add
+ *       some elements before failing.
+ */
+int ast_vector_string_split(struct ast_vector_string *dest,
+       const char *input, const char *delim, int flags,
+       int (*excludes_cmp)(const char *s1, const char *s2));
 
 /*!
  * \brief Define a vector structure with a read/write lock

diff --git a/main/strings.c b/main/strings.c
index 82e315a..ad96df2 100644 (file)
--- a/main/strings.c
+++ b/main/strings.c
@@ -40,6 +40,7 @@
 #include <regex.h>
 #include "asterisk/strings.h"
 #include "asterisk/pbx.h"
+#include "asterisk/vector.h"
 
 /*!
  * core handler for dynamic strings.
@@ -389,3 +390,44 @@ char *ast_read_line_from_buffer(char **buffer)
 
        return start;
 }
+
+int ast_vector_string_split(struct ast_vector_string *dest,
+       const char *input, const char *delim, int flags,
+       int (*excludes_cmp)(const char *s1, const char *s2))
+{
+       char *buf;
+       char *cur;
+       int no_trim = flags & AST_VECTOR_STRING_SPLIT_NO_TRIM;
+       int allow_empty = flags & AST_VECTOR_STRING_SPLIT_ALLOW_EMPTY;
+
+       ast_assert(dest != NULL);
+       ast_assert(!ast_strlen_zero(delim));
+
+       if (ast_strlen_zero(input)) {
+               return 0;
+       }
+
+       buf = ast_strdupa(input);
+       while ((cur = strsep(&buf, delim))) {
+               if (!no_trim) {
+                       cur = ast_strip(cur);
+               }
+
+               if (!allow_empty && ast_strlen_zero(cur)) {
+                       continue;
+               }
+
+               if (excludes_cmp && AST_VECTOR_GET_CMP(dest, cur, !excludes_cmp)) {
+                       continue;
+               }
+
+               cur = ast_strdup(cur);
+               if (!cur || AST_VECTOR_APPEND(dest, cur)) {
+                       ast_free(cur);
+
+                       return -1;
+               }
+       }
+
+       return 0;
+}