api: add function file_copy (issue #1667)

src/core/wee-dir.c

@@ -555,6 +555,62 @@ error:
     return NULL;
 }
 
+/*
+ * Copies a file to another location.
+ *
+ * Returns:
+ *   1: OK
+ *   0: error
+ */
+
+int
+dir_file_copy (const char *from, const char *to)
+{
+    FILE *src, *dst;
+    char *buffer;
+    int rc;
+    size_t count;
+
+    rc = 0;
+    buffer = NULL;
+    src = NULL;
+    dst = NULL;
+
+    if (!from || !from[0] || !to || !to[0])
+        goto end;
+
+    buffer = malloc (65536);
+    if (!buffer)
+        goto end;
+
+    src = fopen (from, "rb");
+    if (!src)
+        goto end;
+    dst = fopen (to, "wb");
+    if (!dst)
+        goto end;
+
+    while (!feof (src))
+    {
+        count = fread (buffer, 1, 65535, src);
+        if (count <= 0)
+            goto end;
+        if (fwrite (buffer, 1, count, dst) <= 0)
+            goto end;
+    }
+
+    rc = 1;
+
+end:
+    if (buffer)
+	free (buffer);
+    if (src)
+        fclose (src);
+    if (dst)
+        fclose (dst);
+    return rc;
+}
+
 /*
  * Uses one or four different paths for WeeChat home directories.
  *

src/core/wee-dir.h

@@ -33,6 +33,7 @@ extern void dir_exec_on_files (const char *directory, int recurse_subdirs,
 extern char *dir_search_full_lib_name (const char *filename,
                                        const char *sys_directory);
 extern char *dir_file_get_content (const char *filename);
+extern int dir_file_copy (const char *from, const char *to);
 extern void dir_create_home_dirs ();
 extern void dir_remove_home_dirs ();
 extern char *dir_get_string_home_dirs ();

src/plugins/plugin.c

@@ -672,6 +672,7 @@ plugin_load (const char *filename, int init_plugin, int argc, char **argv)
         new_plugin->mkdir_parents = &dir_mkdir_parents;
         new_plugin->exec_on_files = &dir_exec_on_files;
         new_plugin->file_get_content = &dir_file_get_content;
+        new_plugin->file_copy = &dir_file_copy;
 
         new_plugin->util_timeval_cmp = &util_timeval_cmp;
         new_plugin->util_timeval_diff = &util_timeval_diff;

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 "20210601-01"
+#define WEECHAT_PLUGIN_API_VERSION "20210703-01"
 
 /* macros for defining plugin infos */
 #define WEECHAT_PLUGIN_NAME(__name)                                     \
@@ -395,6 +395,7 @@ struct t_weechat_plugin
                            void (*callback)(void *data, const char *filename),
                            void *callback_data);
     char *(*file_get_content) (const char *filename);
+    int (*file_copy) (const char *from, const char *to);
 
     /* util */
     int (*util_timeval_cmp) (struct timeval *tv1, struct timeval *tv2);
@@ -1374,6 +1375,8 @@ extern int weechat_plugin_end (struct t_weechat_plugin *plugin);
                                     __callback, __callback_data)
 #define weechat_file_get_content(__filename)                            \
     (weechat_plugin->file_get_content)(__filename)
+#define weechat_file_copy(__from, __to)                                 \
+    (weechat_plugin->file_copy)(__from, __to)
 
 /* util */
 #define weechat_util_timeval_cmp(__time1, __time2)                      \