416 lines
8.5 KiB
C
416 lines
8.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <time.h>
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#include <stdbool.h>
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#define NS_PER_S 1000000000
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struct timespec finish, delta;
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int pausedTime = 0;
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bool timerActive = false;
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bool paused = false;
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bool alive = true;
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int timerOffset = 0;
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enum event_type {
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START,
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SPLIT,
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SKIP,
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PAUSE,
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RESUME,
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STOP
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};
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struct run_event {
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enum event_type type;
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struct timespec time;
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};
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struct run_event *run;
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//Enough to hold a sm64 16 star, can realloc later
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int runMaxLength = 12;
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int runMarker = 0;
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int runMarker2 = 0;
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//save file stuff
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int files = 0;
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char **filePaths = NULL;
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char **names, **values;
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int valuecount;
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void sub_timespec(struct timespec t1, struct timespec t2, struct timespec* td)
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{
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td->tv_nsec = t2.tv_nsec - t1.tv_nsec;
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td->tv_sec = t2.tv_sec - t1.tv_sec;
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if (td->tv_sec > 0 && td->tv_nsec < 0) {
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td->tv_nsec += NS_PER_S;
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td->tv_sec--;
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} else if (td->tv_sec < 0 && td->tv_nsec > 0) {
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td->tv_nsec -= NS_PER_S;
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td->tv_sec++;
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}
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}
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void offset_timespec(int milliseconds, struct timespec* t)
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{
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//this should leave milliseconds with just the remainder
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int second_offset = milliseconds / 1000;
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milliseconds -= second_offset * 1000;
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int nanosecond_offset = milliseconds * 1000000;
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t->tv_nsec -= nanosecond_offset;
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if (t->tv_nsec < 0) {
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second_offset++;
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t->tv_nsec += 1000000000;
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}
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t->tv_sec -= second_offset;
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}
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int timespecToMS(struct timespec t)
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{
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return (t.tv_nsec / 1000000) + (t.tv_sec * 1000);
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}
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void extend_run()
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{
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runMaxLength *= 2;
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run = realloc(run, sizeof(struct run_event) * runMaxLength);
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}
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void add_event(enum event_type t)
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{
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if (runMarker == runMaxLength)
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extend_run();
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run[runMarker].type = t;
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clock_gettime(CLOCK_REALTIME, &run[runMarker].time);
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if (t == START)
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offset_timespec(timerOffset, &run[runMarker].time);
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runMarker++;
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runMarker2 = runMarker;
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}
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void start()
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{
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//TODO: Save the old run to the file before the new one starts,
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//the reason to do this here is it gives the runner a chance to undo
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//if they accidentally hit the stop button
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//TODO: Clear the run data first
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timerActive = true;
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add_event(START);
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}
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void stop()
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{
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timerActive = false;
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add_event(STOP);
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//this makes sure the time clients recieve from time
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//requests match the time on the stop event
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finish = run[runMarker - 1].time;
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}
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void split()
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{
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add_event(SPLIT);
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}
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void skip()
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{
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add_event(SKIP);
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}
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void addPauseTime()
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{
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int pauseEvent = 0;
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for (int i = runMarker - 2; i >= 1; i--) {
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if (run[i].type == PAUSE) {
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pauseEvent = i;
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break;
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}
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}
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sub_timespec(run[pauseEvent].time, run[runMarker - 1].time, &delta);
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pausedTime += timespecToMS(delta);
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}
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void subtractPauseTime()
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{
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int pauseEvent = 0;
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for (int i = runMarker - 1; i >= i; i--) {
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if (run[i].type == PAUSE) {
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pauseEvent = i;
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break;
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}
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}
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sub_timespec(run[pauseEvent].time, run[runMarker].time, &delta);
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pausedTime -= timespecToMS(delta);
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}
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void undo()
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{
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if (runMarker > 0) {
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runMarker--;
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if (run[runMarker].type == STOP)
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timerActive = true;
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if (run[runMarker].type == START)
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timerActive = false;
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if (run[runMarker].type == PAUSE)
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paused = false;
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if (run[runMarker].type == RESUME) {
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paused = true;
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subtractPauseTime();
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}
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}
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}
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void redo()
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{
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if (runMarker < runMarker2) {
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runMarker++;
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if (run[runMarker - 1].type == STOP)
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timerActive = false;
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if (run[runMarker - 1].type == START)
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timerActive = true;
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if (run[runMarker - 1].type == PAUSE)
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paused = true;
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if (run[runMarker - 1].type == RESUME) {
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paused = false;
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addPauseTime();
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}
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}
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}
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//this isnt just called pause() because that would overlap with <unistd.h>
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void pause_timer()
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{
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if (!paused) {
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add_event(PAUSE);
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paused = true;
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}
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}
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void resume()
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{
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if (paused) {
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add_event(RESUME);
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paused = false;
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addPauseTime();
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}
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}
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void loadFiles()
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{
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FILE* fp;
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//TODO: for now we're just looking for the metadata values
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char buff[255];
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char buff2[255];
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for (int i = 0; i < files; i++) {
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fp = fopen(filePaths[i], "r");
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while(1) {
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char *x = fgets(buff, 255, fp);
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if (buff[0] == '/' && buff[1] == '/' || buff[0] == '\n')
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continue;
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if (!strcmp(buff, "Segment") || !strcmp(buff, "Route") || x == NULL)
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break;
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fgets(buff2, 255, fp);
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if (buff2[0] == '\t') {
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valuecount++;
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names = realloc(names, sizeof(char*) * valuecount);
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names[valuecount - 1] = malloc(strlen(buff) - 1);
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strncpy(names[valuecount - 1], buff, strlen(buff) - 1);
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names[valuecount - 1][strlen(buff)] = '\0';
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values = realloc(values, sizeof(char*) * valuecount);
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values[valuecount - 1] = malloc(strlen(buff2) - 2);
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strncpy(values[valuecount - 1], buff2 + 1, strlen(buff2) - 1);
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values[valuecount - 1][strlen(buff2)] = '\0';
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}
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}
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fclose(fp);
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}
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//Print metadata arrays
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for (int i = 0; i < valuecount; i++) {
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printf("%s | %s", names[i], values[i]);
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}
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}
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//TODO: eventually file loading should support loading multiple files
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void addFile(char *path)
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{
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files++;
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filePaths = realloc(filePaths, sizeof(char*) * files);
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filePaths[files - 1] = path;
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loadFiles();
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}
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void sendTime(int sock)
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{
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int n, x;
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if (timerActive)
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clock_gettime(CLOCK_REALTIME, &finish);
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if (paused) {
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sub_timespec(run[0].time, run[runMarker - 1].time, &delta);
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} else {
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sub_timespec(run[0].time, finish, &delta);
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}
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x = timespecToMS(delta) - pausedTime;
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n = write(sock, &x, sizeof(int));
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if (n < 0) {
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perror("ERROR writing to socket");
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exit(1);
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}
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}
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void sendValue(int sock, char* name)
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{
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int n, x;
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bool namefound = false;
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for(int i = 0; i < valuecount; i++) {
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if (!strcmp(names[i], name)) {
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x = i;
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namefound = true;
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}
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}
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if (namefound)
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n = write(sock, values[x], strlen(values[x]));
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else
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n = write(sock, "DATA NOT PRESENT", 17);
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if (n < 0) {
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perror("ERROR writing to socket");
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exit(1);
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}
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}
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void doprocessing (int sock)
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{
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int n;
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char commandcode;
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n = read(sock,&commandcode,1);
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if (n < 0) {
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perror("ERROR reading from socket");
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exit(1);
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}
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if (commandcode == 1) {
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//printf("Recieved time command\n");
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sendTime(sock);
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} else if (commandcode == 2) {
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printf("Recieved start command\n");
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start();
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} else if (commandcode == 3) {
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printf("Recieved stop command\n");
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stop();
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} else if (commandcode == 4) {
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printf("Recieved kill command\n");
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alive = false;
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} else if (commandcode == 5) {
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printf("Recieved split command\n");
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split();
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} else if (commandcode == 6) {
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printf("Recieved skip command\n");
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skip();
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} else if (commandcode == 7) {
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printf("Recieved pause command\n");
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pause_timer();
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} else if (commandcode == 8) {
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printf("Recieved resume command\n");
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resume();
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} else if (commandcode == 9) {
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printf("Recieved undo command\n");
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undo();
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} else if (commandcode == 10) {
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printf("Recieved redo command\n");
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redo();
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} else if (commandcode == 11) {
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printf("Recieved request for foreground color\n");
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sendValue(sock, "Foreground-Color");
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} else if (commandcode == 12) {
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printf("Recieved request for background color\n");
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sendValue(sock, "Background-Color");
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} else {
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printf("Recieved invalid command code, ignoring...\n");
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}
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}
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int main(int argc, char *argv[])
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{
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int sockfd, newsockfd, portno, clilen;
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char buffer[256];
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struct sockaddr_in serv_addr, cli_addr;
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int n, pid;
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run = malloc(sizeof(struct run_event) * runMaxLength);
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//TODO: remove this file testing boilerplate
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addFile(argv[1]);
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/* First call to socket() function */
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sockfd = socket(AF_INET, SOCK_STREAM, 0);
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if (sockfd < 0) {
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perror("ERROR opening socket");
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exit(1);
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}
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/* Initialize socket structure */
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bzero((char *) &serv_addr, sizeof(serv_addr));
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portno = 8101;
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_addr.s_addr = INADDR_ANY;
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serv_addr.sin_port = htons(portno);
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/* Now bind the host address using bind() call.*/
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if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
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perror("ERROR on binding");
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exit(1);
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}
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/* Now start listening for the clients, here
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* process will go in sleep mode and will wait
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* for the incoming connection
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*/
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listen(sockfd,5);
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clilen = sizeof(cli_addr);
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while (alive) {
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newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
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if (newsockfd < 0) {
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perror("ERROR on accept");
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exit(1);
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}
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/* Create child process */
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//pid = fork();
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pid = 1;
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if (pid < 0) {
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perror("ERROR on fork");
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exit(1);
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}
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if (pid == 0) {
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/* This is the child process */
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//close(sockfd);
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//doprocessing(newsockfd);
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//exit(0);
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}
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else {
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doprocessing(newsockfd);
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close(newsockfd);
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}
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} /* end of while */
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free(run);
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close(sockfd);
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}
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