add table processing demo

2 files changed, 72 insertions, 1 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9776cd..85f3024 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,8 +66,19 @@ set_target_properties(example_argument_parsing PROPERTIES
   CMAKE_C_FLAGS "-Wall -Wextra -Werror -Wfatal-errors -Wpedantic")
 target_link_libraries(example_argument_parsing ${LUA_LIBRARIES} honeysuckle)
 
+add_executable(example_table_processing EXCLUDE_FROM_ALL
+  ${EX_ROOT}/table_processing/table_processing.c)
+set_target_properties(example_table_processing PROPERTIES
+  C_STANDARD 99
+  CMAKE_C_FLAGS "-Wall -Wextra -Werror -Wfatal-errors -Wpedantic")
+target_link_libraries(example_table_processing ${LUA_LIBRARIES} honeysuckle)
+
+
 add_custom_target(examples)
-add_dependencies(examples example_table_creation example_argument_parsing)
+add_dependencies(examples
+  example_table_creation
+  example_argument_parsing
+  example_table_processing)
 
 
 include(GNUInstallDirs)
diff --git a/examples/table_processing/table_processing.c b/examples/table_processing/table_processing.c
new file mode 100644
index 0000000..64c1f01
--- /dev/null
+++ b/examples/table_processing/table_processing.c
@@ -0,0 +1,60 @@
+#include <string.h>
+#include <stdlib.h>
+#include <honeysuckle.h>
+
+struct settings
+{
+   bool debug;
+   int debug_level;
+   char *logfile;
+} global_settings;
+
+void set_logfile(const char* filename, void *s)
+{
+   struct settings *settings = (struct settings *) s;
+   settings->logfile = malloc(sizeof(char) * strlen(filename));
+   strcpy(settings->logfile, filename);
+}
+
+int process(lua_State *L)
+{
+   int table_index;
+   hs_parse_args(L, hs_tbl(table_index));
+   hs_process_table(L, table_index,
+		    hs_process_bool("debug",
+				    hs_pt_set_boolean,
+				    &(global_settings.debug)),
+		    hs_process_int("level",
+				   hs_pt_set_integer,
+				   &(global_settings.debug_level)),
+		    hs_process_str("logfile",
+				   set_logfile,
+				   &global_settings));
+   return 0;
+}
+
+int main()
+{
+   lua_State *L = luaL_newstate();
+   luaL_openlibs(L);
+
+   lua_pushcfunction(L, process);
+   lua_setglobal(L, "configure");
+
+   global_settings.debug = false;
+   global_settings.debug_level = 0;
+   global_settings.logfile = "nil";
+
+   printf("settings: [ %d, %d, '%s' ]\n",
+	  global_settings.debug,
+	  global_settings.debug_level,
+	  global_settings.logfile);
+
+   luaL_dostring(L, "configure{debug=true, level=6, logfile='output.log'}");
+
+   printf("settings: [ %d, %d, '%s' ]\n",
+	  global_settings.debug,
+	  global_settings.debug_level,
+	  global_settings.logfile);
+   return 0;
+}