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69360c7407
A string is serialized as a length (2 bytes) followed by the string data (non nul-terminated). For now, it is used only once, but we will need to serialize strings in other events.
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
#include "control_event.h"
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#include <string.h>
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#include "buffer_util.h"
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#include "log.h"
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#include "str_util.h"
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static void
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write_position(uint8_t *buf, const struct position *position) {
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buffer_write32be(&buf[0], position->point.x);
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buffer_write32be(&buf[4], position->point.y);
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buffer_write16be(&buf[8], position->screen_size.width);
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buffer_write16be(&buf[10], position->screen_size.height);
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}
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// write length (2 bytes) + string (non nul-terminated)
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static size_t
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write_string(const char *utf8, size_t max_len, unsigned char *buf) {
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size_t len = utf8_truncation_index(utf8, max_len);
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buffer_write16be(buf, (uint16_t) len);
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memcpy(&buf[2], utf8, len);
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return 2 + len;
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}
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size_t
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control_event_serialize(const struct control_event *event, unsigned char *buf) {
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buf[0] = event->type;
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switch (event->type) {
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case CONTROL_EVENT_TYPE_KEYCODE:
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buf[1] = event->keycode_event.action;
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buffer_write32be(&buf[2], event->keycode_event.keycode);
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buffer_write32be(&buf[6], event->keycode_event.metastate);
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return 10;
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case CONTROL_EVENT_TYPE_TEXT: {
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size_t len = write_string(event->text_event.text,
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CONTROL_EVENT_TEXT_MAX_LENGTH, &buf[1]);
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return 1 + len;
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}
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case CONTROL_EVENT_TYPE_MOUSE:
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buf[1] = event->mouse_event.action;
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buffer_write32be(&buf[2], event->mouse_event.buttons);
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write_position(&buf[6], &event->mouse_event.position);
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return 18;
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case CONTROL_EVENT_TYPE_SCROLL:
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write_position(&buf[1], &event->scroll_event.position);
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buffer_write32be(&buf[13], (uint32_t) event->scroll_event.hscroll);
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buffer_write32be(&buf[17], (uint32_t) event->scroll_event.vscroll);
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return 21;
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case CONTROL_EVENT_TYPE_BACK_OR_SCREEN_ON:
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case CONTROL_EVENT_TYPE_EXPAND_NOTIFICATION_PANEL:
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case CONTROL_EVENT_TYPE_COLLAPSE_NOTIFICATION_PANEL:
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// no additional data
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return 1;
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default:
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LOGW("Unknown event type: %u", (unsigned) event->type);
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return 0;
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}
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}
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void
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control_event_destroy(struct control_event *event) {
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if (event->type == CONTROL_EVENT_TYPE_TEXT) {
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SDL_free(event->text_event.text);
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}
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}
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