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/** @file */
#ifndef HONEY_COMMON_H
#define HONEY_COMMON_H
// standard c libraries
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
// POSIX options
#include <unistd.h>
// lua interpreter
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
// glad
#include "glad/glad.h"
#include <GLFW/glfw3.h>
// c opengl mathematics function
#define CGLM_ALL_UNALIGNED
#include <cglm/cglm.h>
#include <cglm/call.h>
// assimp
#include <assimp/cimport.h>
#include <assimp/scene.h>
#include <assimp/postprocess.h>
// stb image
#include "stb_image/stb_image.h"
typedef GLFWwindow* honey_window;
typedef struct {
honey_window window;
int width;
int height;
bool fullscreen;
} honey_window_information;
extern int honey_window_info_ref;
extern int honey_window_resize_callback_ref;
extern int honey_window_resize_callback_data_ref;
extern int honey_window_focus_callback_ref;
extern int honey_window_focus_callback_data_ref;
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
typedef enum {
/* generic results */
HONEY_OK,
HONEY_MEMORY_ALLOCATION_ERROR,
HONEY_FILE_READ_ERROR,
/* shader errors */
HONEY_VERTEX_SHADER_COMPILATION_ERROR,
HONEY_FRAGMENT_SHADER_COMPILATION_ERROR,
HONEY_SHADER_LINK_ERROR,
/* mesh errors */
HONEY_MESH_BAD_VERTEX_DATA,
HONEY_MESH_BAD_INDEX_DATA,
/* model errors */
HONEY_MODEL_LOAD_ERROR,
HONEY_N_ERRORS
} honey_result;
#define HONEY_ERROR_DATA_STRING_LENGTH 4096
static struct {
char string1[HONEY_ERROR_DATA_STRING_LENGTH];
char string2[HONEY_ERROR_DATA_STRING_LENGTH];
} honey_error_data;
void honey_error_clear_strings();
void honey_error_set_string1(char* string);
void honey_error_set_string2(char* string);
/** @brief Generate a human-readable error message.
*
* @param[out] error_string A string with at least 3*HONEY_ERROR_DATA_STRING_LENGTH characters to store the result
* @param[in] error The error to generate a message for
*/
void honey_human_readable_error(char* error_string, honey_result error);
/** @brief Generate a string from a format string.
*
* This function allocates memory for the destination; the user is
* responsible for deallocating it. As a side effect of this, the destination
* pointer cannot overlap with any of the varargs.
*
* @param[out] string Pointer to the destination string.
* @param[in] format_string The format string used to generate the result.
* @param[in] ... The arguments for the format string.
*
* @returns HONEY_OK on success; HONEY_MEMORY_ALLOCATION_ERROR on a
* memory allocation error.
*/
honey_result honey_format_string(char** string,
char* format_string,
...);
/* lua binding functions */
typedef enum {
HONEY_BOOLEAN,
HONEY_INTEGER,
HONEY_NUMBER,
HONEY_STRING,
HONEY_FUNCTION,
HONEY_TABLE,
HONEY_NIL,
HONEY_USERDATA,
HONEY_LIGHTUSERDATA,
HONEY_ANY
} honey_lua_type;
/** @brief Get arguments from a function, checking to ensure the types match.
*
* If a function should accept a variable list of arguments, but you still wish to ensure
* correct types, use honey_lua_validate_types() and throw an error only if all of your
* possiblities fail to match.
*
* Note that this function will check for correct types of HONEY_TABLE, HONEY_NIL, and
* HONEY_FUNCTION, but does not expect a pointer to them. It performs no check for
* HONEY_ANY, and also does not expect a pointer.
*
* @param[in] L The lua state to parse arguments from.
* @param[in] n The number of arguments to parse.
* @param[in] ... Variadic list of alternating types and pointers to store the type.
*
* @returns Nothing, but throws a lua_error if a type mismatch is detected.
*/
void honey_lua_parse_arguments(lua_State* L, int n, ...);
/** @brief Check that a functions' arguments are of the correct type.
*
* @param[in] L The lua state to validate.
* @param[in] n_types The number of types to validate.
* @param[in] ... Variadic list of honey_lua_types to validate against the stack.
*
* @returns true if the validation was successful; false otherwise, pushing an error message
* to the lua stack.
*/
bool honey_lua_validate_types(lua_State* L, unsigned int n_types, ...);
/** @brief Wrap C objects for lua. */
typedef struct honey_lua_element {
char* name;
honey_lua_type type;
union {
int integer;
double number;
char* string;
int (*function)(lua_State*);
struct {
int n_elements;
struct honey_lua_element* elements;
} table;
void* pointer;
} data;
} honey_lua_element;
/** @brief Push an element to the lua stack.
*
* @param[in] L The lua state to push the element to.
* @param[in] element The honey_lua_element to push to the stack.
*
* @returns Nothing.
*/
void honey_lua_push_element(lua_State* L,
honey_lua_element element);
/** @brief Create a lua table populated with various elements.
*
* @param[in] L The lua state to push the table to.
* @param[in] elements Array of elements to populate the table.
* @param[in] n_elements The number of elements in the array.
*
* @returns Nothing.
*/
void honey_lua_create_table(lua_State* L,
honey_lua_element* elements,
unsigned int n_elements);
/** @brief Get the traceback for use after an error.
*/
int honey_lua_traceback(lua_State* L);
/** @brief Wrapper for lua_pcall that uses a honey_lua_traceback as an error handler.
*/
int honey_lua_pcall(lua_State* L, int nargs, int nret);
/** @brief Trigger honey to exit.
*
* @returns Nothing.
*/
int honey_exit(lua_State* L);
#endif
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