api: add function utf8_strncpy

4 files changed, 33 insertions, 1 deletions

diff --git a/src/core/wee-utf8.c b/src/core/wee-utf8.c
index 78f717817..6f6526319 100644
--- a/src/core/wee-utf8.c
+++ b/src/core/wee-utf8.c
@@ -738,3 +738,30 @@ utf8_strndup (const char *string, int length)
 
     return string_strndup (string, end - string);
 }
+
+/*
+ * Copies max N chars from a string to another and adds null byte at the end.
+ *
+ * Note: the target string "dest" must be long enough.
+ */
+
+void
+utf8_strncpy (char *dest, const char *string, int length)
+{
+    const char *end;
+
+    if (!dest)
+        return;
+
+    dest[0] = '\0';
+
+    if (!string || (length <= 0))
+        return;
+
+    end = utf8_add_offset (string, length);
+    if (!end || (end == string))
+        return;
+
+    memcpy (dest, string, end - string);
+    dest[end - string] = '\0';
+}
diff --git a/src/core/wee-utf8.h b/src/core/wee-utf8.h
index 5a228cc0f..85259ef82 100644
--- a/src/core/wee-utf8.h
+++ b/src/core/wee-utf8.h
@@ -51,5 +51,6 @@ extern const char *utf8_add_offset (const char *string, int offset);
 extern int utf8_real_pos (const char *string, int pos);
 extern int utf8_pos (const char *string, int real_pos);
 extern char *utf8_strndup (const char *string, int length);
+extern void utf8_strncpy (char *dest, const char *string, int length);
 
 #endif /* WEECHAT_UTF8_H */
diff --git a/src/plugins/plugin.c b/src/plugins/plugin.c
index 6f2e7a5cc..b9b7584fb 100644
--- a/src/plugins/plugin.c
+++ b/src/plugins/plugin.c
@@ -665,6 +665,7 @@ plugin_load (const char *filename, int init_plugin, int argc, char **argv)
         new_plugin->utf8_real_pos = &utf8_real_pos;
         new_plugin->utf8_pos = &utf8_pos;
         new_plugin->utf8_strndup = &utf8_strndup;
+        new_plugin->utf8_strncpy = &utf8_strncpy;
 
         new_plugin->crypto_hash = &plugin_api_crypto_hash;
         new_plugin->crypto_hash_file = &plugin_api_crypto_hash_file;
diff --git a/src/plugins/weechat-plugin.h b/src/plugins/weechat-plugin.h
index 19c09ba37..551f14008 100644
--- a/src/plugins/weechat-plugin.h
+++ b/src/plugins/weechat-plugin.h
@@ -68,7 +68,7 @@ struct timeval;
  * please change the date with current one; for a second change at same
  * date, increment the 01, otherwise please keep 01.
  */
-#define WEECHAT_PLUGIN_API_VERSION "20221003-01"
+#define WEECHAT_PLUGIN_API_VERSION "20221203-01"
 
 /* macros for defining plugin infos */
 #define WEECHAT_PLUGIN_NAME(__name)                                     \
@@ -379,6 +379,7 @@ struct t_weechat_plugin
     int (*utf8_real_pos) (const char *string, int pos);
     int (*utf8_pos) (const char *string, int real_pos);
     char *(*utf8_strndup) (const char *string, int length);
+    void (*utf8_strncpy) (char *dest, const char *string, int length);
 
     /* crypto */
     int (*crypto_hash) (const void *data, int data_size,
@@ -1378,6 +1379,8 @@ extern int weechat_plugin_end (struct t_weechat_plugin *plugin);
     (weechat_plugin->utf8_pos)(__string, __real_pos)
 #define weechat_utf8_strndup(__string, __length)                        \
     (weechat_plugin->utf8_strndup)(__string, __length)
+#define weechat_utf8_strncpy(__dest, __string, __length)                \
+    (weechat_plugin->utf8_strncpy)(__dest, __string, __length)
 
 /* crypto */
 #define weechat_crypto_hash(__data, __data_size, __hash_algo,           \