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Extract bit operations to buffer_util.h

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Move util functions to a reusable separate header.
This commit is contained in:
Romain Vimont 2018-11-11 00:48:25 +01:00
parent b1d2c2c640
commit cb3cf801c8
2 changed files with 29 additions and 22 deletions
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18
app/src/buffer_util.h Normal file
View file

@ -0,0 +1,18 @@
#ifndef BUFFER_UTIL_H
#define BUFFER_UTIL_H
#include <SDL2/SDL_stdinc.h>
static inline void buffer_write16be(Uint8 *buf, Uint16 value) {
buf[0] = value >> 8;
buf[1] = value;
}
static inline void buffer_write32be(Uint8 *buf, Uint32 value) {
buf[0] = value >> 24;
buf[1] = value >> 16;
buf[2] = value >> 8;
buf[3] = value;
}
#endif

33
app/src/control_event.c
View file

@ -3,26 +3,15 @@
#include <SDL2/SDL_stdinc.h>
#include <string.h>
#include "buffer_util.h"
#include "lock_util.h"
#include "log.h"
static inline void write16(Uint8 *buf, Uint16 value) {
buf[0] = value >> 8;
buf[1] = value;
}
static inline void write32(Uint8 *buf, Uint32 value) {
buf[0] = value >> 24;
buf[1] = value >> 16;
buf[2] = value >> 8;
buf[3] = value;
}
static void write_position(Uint8 *buf, const struct position *position) {
write16(&buf[0], position->point.x);
write16(&buf[2], position->point.y);
write16(&buf[4], position->screen_size.width);
write16(&buf[6], position->screen_size.height);
buffer_write16be(&buf[0], position->point.x);
buffer_write16be(&buf[2], position->point.y);
buffer_write16be(&buf[4], position->screen_size.width);
buffer_write16be(&buf[6], position->screen_size.height);
}
int control_event_serialize(const struct control_event *event, unsigned char *buf) {
@ -30,8 +19,8 @@ int control_event_serialize(const struct control_event *event, unsigned char *bu
switch (event->type) {
case CONTROL_EVENT_TYPE_KEYCODE:
buf[1] = event->keycode_event.action;
write32(&buf[2], event->keycode_event.keycode);
write32(&buf[6], event->keycode_event.metastate);
buffer_write32be(&buf[2], event->keycode_event.keycode);
buffer_write32be(&buf[6], event->keycode_event.metastate);
return 10;
case CONTROL_EVENT_TYPE_TEXT: {
// write length (1 byte) + date (non nul-terminated)
@ -40,19 +29,19 @@ int control_event_serialize(const struct control_event *event, unsigned char *bu
// injecting a text takes time, so limit the text length
len = TEXT_MAX_LENGTH;
}
write16(&buf[1], (Uint16) len);
buffer_write16be(&buf[1], (Uint16) len);
memcpy(&buf[3], event->text_event.text, len);
return 3 + len;
}
case CONTROL_EVENT_TYPE_MOUSE:
buf[1] = event->mouse_event.action;
write32(&buf[2], event->mouse_event.buttons);
buffer_write32be(&buf[2], event->mouse_event.buttons);
write_position(&buf[6], &event->mouse_event.position);
return 14;
case CONTROL_EVENT_TYPE_SCROLL:
write_position(&buf[1], &event->scroll_event.position);
write32(&buf[9], (Uint32) event->scroll_event.hscroll);
write32(&buf[13], (Uint32) event->scroll_event.vscroll);
buffer_write32be(&buf[9], (Uint32) event->scroll_event.hscroll);
buffer_write32be(&buf[13], (Uint32) event->scroll_event.vscroll);
return 17;
case CONTROL_EVENT_TYPE_COMMAND:
buf[1] = event->command_event.action;