JustUI/include/justui/defs.h

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2021-03-12 16:19:43 +01:00
//---
// JustUI.defs: Type and utility definitions
//---
#ifndef _J_DEFS
#define _J_DEFS
#include <gint/defs/types.h>
#include <gint/defs/util.h>
#include <gint/defs/attributes.h>
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
/* jdirs: Quadruplet with four directions */
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typedef struct {
uint8_t top;
uint8_t right;
uint8_t bottom;
uint8_t left;
} jdirs;
/* jrect: Small rectangle */
typedef struct {
int16_t x, y;
int16_t w, h;
} jrect;
/* jalign: Alignment options with both horizontal and vertical names */
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typedef enum {
/* Horizontal names */
J_ALIGN_LEFT = 0,
J_ALIGN_CENTER = 1,
J_ALIGN_RIGHT = 2,
/* Vertical names */
J_ALIGN_TOP = 0,
J_ALIGN_MIDDLE = 1,
J_ALIGN_BOTTOM = 2,
} __attribute__((packed)) jalign;
/* j_arg_t: Standard 4-byte argument types for callbacks */
typedef union {
/* Pointers of different qualifiers */
void *p;
void const *cp;
volatile void *vp;
volatile void const *vcp;
/* Integers */
int32_t i32;
uint32_t u32;
} GTRANSPARENT j_arg_t;
/* Vararg macro to cast (void *) parameters to (jwidget *), useful in generic
widget functions. J_CAST(x, y, ...) will expand to
jwidget *x = x0;
jwidget *y = y0;
...
and accepts from 1 to 4 parameters. */
#define J_CAST0(x) _Pragma("GCC error \"J_CAST takes only up to 4 arguments\"")
#define J_CAST1(x, ...) jwidget *x = x ## 0; __VA_OPT__(J_CAST0(__VA_ARGS__))
#define J_CAST2(x, ...) jwidget *x = x ## 0; __VA_OPT__(J_CAST1(__VA_ARGS__))
#define J_CAST3(x, ...) jwidget *x = x ## 0; __VA_OPT__(J_CAST2(__VA_ARGS__))
#define J_CAST(x, ...) jwidget *x = x ## 0; __VA_OPT__(J_CAST3(__VA_ARGS__))
#endif /* _J_DEFS */