replace-table: Add support for custom functions

This adds a support for custom (registered) functions that can be called
from templates with specified arguments.

The syntax is as follows:

<!-- $(function_name(arg1, "arg2", 'arg3')) -->

Arguments are separated by a comma and can be quoted (recommended).
Quoted arguments are allowed to contain a comma as well as another
quote when escaped with a backslash.

To call a function with no arguments just do "function_name()".

Functions are supposed to be registered before actual data are parsed
and are called back from within the parser cycle.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/replace-table.h b/src/replace-table.h
index 7d6b70e..0d81c92 100644
--- a/src/replace-table.h
+++ b/src/replace-table.h
@@ -25,6 +25,11 @@ G_BEGIN_DECLS
 
 typedef struct ReplaceTable ReplaceTable;
 
+/*
+ *  registered function callback, arguments passed as strings
+ */
+typedef char * (*ReplaceTableFunction) (gchar **args, gpointer user_data);
+
 
 ReplaceTable * replace_table_new ();
 
@@ -48,6 +53,12 @@ void replace_table_add_key_printf (ReplaceTable *table, const gchar *tag, const
 void replace_table_set_defines (ReplaceTable *table, GHashTable *defines);
 
 /*
+ *   replace_table_register_function: register a method callback for specified function name
+ *
+ */
+void replace_table_register_function (ReplaceTable *table, const gchar *function_name, ReplaceTableFunction callback, gpointer user_data);
+
+/*
  *   replace_table_process: process buffer and replace all tags filled in the replace table
  *
  *      - reallocates source buffer