-#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
#include "args.h"
-#include "config.h"
-
-// Gameplay Variations
-float opt_bounciness;
-float opt_gamespeed;
-float opt_max_lead;
+#include <config.h>
+#include "vorconfig.h"
// Look and Feel
int opt_fullscreen;
-int opt_music;
int opt_sound;
+int opt_joystick_enabled;
+int opt_joystick_number;
+int opt_joystick_x_axis;
+int opt_joystick_y_axis;
+
+int opt_autopilot;
+static void
+show_help(void)
+{
+ puts("Dodge the rocks until you die.");
+ putchar('\n');
+ puts(" -f, --full-screen");
+ puts(" -s, --silent No explosion sounds or music");
+ puts(" -j x,y, --joystick=x,y set the axis numbers. defaults to 0,1");
+ puts(" press a joystick button to activate that joystick");
+ puts(" -V, --version Print program version");
+ puts(" -?, --help Give this help list");
+ putchar('\n');
+ puts("Report bugs at http://jasonwoof.com/contact.html");
+}
-#ifndef WIN32
+// Advances buf while reading a positive int, terminated by [^0-9]
+// buf is left pointing at first [^0-9]
+// If digits are found, the parsed number is written to *out and 0 is returned.
+// Otherwise *buf and *out are left unchanged, and non-zero is returned.
+int
+parse_next_int(char **buf, int* out) {
+ int ret = 0, mul = 1;
+ if(!*buf) {
+ return 1;
+ }
+ // make sure *buf starts -?[0-9]
+ if(**buf == '-') {
+ mul = -1;
+ if((*buf)[1] < '0' || (*buf)[1] > '9') {
+ return 2;
+ }
+ *buf += 1;
+ } else {
+ if(**buf < '0' || **buf > '9') {
+ return 2;
+ }
+ }
+ while(**buf >= '0' && **buf <= '9') {
+ ret *= 10;
+ ret += **buf - '0';
+ *buf += 1;
+ }
+ *out = ret * mul;
-error_t parse_opt(int, char*, struct argp_state *);
+ return 0;
+}
-const char *argp_program_version = "Variations on Rockdodger " VERSION;
-const char *argp_program_bug_address = "<josh@qualdan.com>";
-static char doc[] = "Dodge the rocks until you die.";
-static struct argp_option opts[] = {
- {0, 0, 0, 0, "Gameplay Variations:"},
- {"bounciness", 'b', "N%", 0, "Keep N% of speed when hitting edges (default 50%)"},
- {"game-speed", 'g', "N%", 0, "50-100% (default 100%)"},
- {"max-lead", 'l', "#SCREENS", OPTION_HIDDEN,
- "Max distance ahead you can get\n (default 1 screen; < 0 means no limit)"},
- {0, 0, 0, 0, "Look and Feel:"},
- {"full-screen", 'f', 0, 0, ""},
- {"music", 'm', 0, 0, "Enable music"},
- {"silent", 's', 0, 0, "No explosion sounds or music"},
- {0, 0, 0, 0, "Informational:", -1},
- {0}
-};
+// returns 1 on success. return 0 causes usage message
+int
+parse_joystick_opts(char *arg) {
+ char *arg_was = arg;
+ static char* bad_arg = "Error: invalid argument to -j/--joystick.";
-struct argp argp = { opts, &parse_opt, 0, doc };
+ // argument is required
+ if(arg == NULL) {
+ puts(bad_arg);
+ return 0;
+ }
-#endif // !WIN32
+ // read x axis
+ if(parse_next_int(&arg, &opt_joystick_x_axis)) {
+ puts(bad_arg);
+ return 0;
+ }
+
+ // skip comma
+ if(*arg != ',') {
+ puts(bad_arg);
+ return 0;
+ }
+ arg += 1;
+
+ // read y axis
+ if(parse_next_int(&arg, &opt_joystick_y_axis)) {
+ puts(bad_arg);
+ return 0;
+ }
+
+ // optionally joystick number
+ if(*arg == ',') {
+ arg += 1; // skip comma
+ if(parse_next_int(&arg, &opt_joystick_number)) {
+ puts(bad_arg);
+ return 0;
+ }
+ opt_joystick_enabled = 1;
+ }
+
+ // end with a comma or end of string
+ if(*arg != 0 && *arg != ',') {
+ puts(bad_arg);
+ return 0;
+ }
+
+ // mark arg as consumed (so it won't be parsed as a commandline switch)
+ arg_was[0] = 0;
+
+ // return success
+ return 1;
+}
+int
+short_opt(char c, char *arg)
+{
+ switch(c) {
+ case 'f': opt_fullscreen = 1; break;
+ case 's': opt_sound = 0; break;
+ case 'j':
+ return parse_joystick_opts(arg);
+ case 'V':
+ printf("Variations on Rockdodger %s\n", PACKAGE_VERSION);
+ exit(0);
+ case '?':
+ case 'h': return 0;
+ case 'a': opt_autopilot = 1; break;
+ default:
+ fprintf(stderr, "unknown option -%c\n\n", c);
+ return 0;
+ }
+ return 1;
+}
+
+int
+parse_short_opts(const char *s, char *arg)
+{
+ while(s[1]) if(!short_opt(*s++, NULL)) return 0;
+ return short_opt(*s, arg);
+}
+
+static char *long_opts[] = { "full-screen", "silent", "joystick", "version", "help", "autopilot" };
+
+static char short_opts[] = { 'f', 's', 'j', 'V', 'h', 'a' };
+
+int
+parse_long_opt(const char *s, char *arg)
+{
+ int i;
+ for(i=0; i<sizeof(short_opts); i++) {
+ if(strcmp(s, long_opts[i]) == 0)
+ return short_opt(short_opts[i], arg);
+ }
+ fprintf(stderr, "unknown long option --%s\n\n", s);
+ return 0;
+}
void
init_opts(void)
{
- // Gameplay Variations
- opt_bounciness = 0.50; // lose 50% when you hit the screen edge.
- opt_gamespeed = 1.00; // Run game at full speed.
- opt_max_lead = 1.00*XSIZE; // you can get 1 screen ahead.
-
- // Look and Feel
opt_fullscreen = 0;
opt_sound = 1;
- opt_music = 0;
+ opt_joystick_enabled = 0; // can also be enabled by pressing one of its buttons
+ opt_joystick_number = 0;
+ opt_joystick_x_axis = 0;
+ opt_joystick_y_axis = 1;
+ opt_autopilot = 0;
}
-#ifndef WIN32
-
-error_t
-parse_opt(int key, char *arg, struct argp_state *state)
+int
+parse_opts(int argc, char *argv[])
{
int i;
+ char *r;
- switch(key) {
- case 'b': if(!sscanf(arg, "%d%%", &i)) {
- fprintf(stderr, "bad --bounciness (-b) value (should be 0-100%%)\n");
- argp_state_help(state, stderr, ARGP_HELP_STD_HELP);
- return EINVAL;
- }
- if(i < 50) i = 50; else if(i > 100) i = 100;
- opt_bounciness = (float)i / 100;
- break;
- case 'f': opt_fullscreen = 1; break;
- case 'g': if(!sscanf(arg, "%d%%", &i)) {
- fprintf(stderr, "bad --gamespeed (-g) value (should be 50-100%%)\n");
- argp_state_help(state, stderr, ARGP_HELP_STD_HELP);
- return EINVAL;
- }
- if(i < 0) i = 0; else if(i > 200) i = 100;
- opt_gamespeed = (float)i / 100;
- break;
- case 'l': if(!sscanf(arg, "%f", &opt_max_lead)) {
- fprintf(stderr, "bad --max-lead (-l) value (must be a number)\n");
- argp_state_help(state, stderr, ARGP_HELP_STD_HELP);
- return EINVAL;
- }
- opt_max_lead *= XSIZE;
- break;
- case 'm': opt_music = 1; break;
- case 's': opt_sound = 0; opt_music = 0; break;
- default: return ARGP_ERR_UNKNOWN;
+ init_opts();
+ for(i=1; i<argc; i++) {
+ char *s, *arg;
+ // args that are consumed as arguments to an option (such as the zero
+ // in: -j 0) have their first byte set to null. So skip them:
+ s = argv[i]; if(!*s) continue;
+ if(*s++ != '-') {
+ fputs("not an option\n\n", stderr);
+ show_help();
+ return 0;
+ }
+
+ arg = NULL;
+ for(r=s; *r; r++) if(*r == '=') { *r = 0; arg = r+1; break; }
+
+ if(arg == NULL && i + 1 < argc) {
+ arg = argv[i+1];
+ // if this is used, it's first byte will be set to null, and
+ // it'll be skipped. See above.
+ }
+
+ if(*s == '-') {
+ if(!parse_long_opt(s+1, arg)) { show_help(); return 0; }
+ } else {
+ if(!parse_short_opts(s, arg)) { show_help(); return 0; }
+ }
}
- return 0;
+ return 1;
}
-
-#endif // !WIN32
Got questions, comments, patches, etc.? Contact Jason Woofenden