1#include "commandline.h"
  2
  3#include "debugger/debugger.h"
  4
  5#ifdef USE_CLI_DEBUGGER
  6#include "debugger/cli-debugger.h"
  7#endif
  8
  9#ifdef USE_GDB_STUB
 10#include "debugger/gdb-stub.h"
 11#endif
 12
 13#include <fcntl.h>
 14#include <getopt.h>
 15
 16#define GRAPHICS_OPTIONS "234f"
 17#define GRAPHICS_USAGE \
 18	"\nGraphics options:\n" \
 19	"  -2               2x viewport\n" \
 20	"  -3               3x viewport\n" \
 21	"  -4               4x viewport\n" \
 22	"  -f               Sart full-screen"
 23
 24static const char* _defaultFilename = "test.rom";
 25
 26static const struct option _options[] = {
 27	{ "bios", 1, 0, 'b' },
 28	{ "frameskip", 1, 0, 's' },
 29#ifdef USE_CLI_DEBUGGER
 30	{ "debug", 1, 0, 'd' },
 31#endif
 32#ifdef USE_GDB_STUB
 33	{ "gdb", 1, 0, 'g' },
 34#endif
 35	{ 0, 0, 0, 0 }
 36};
 37
 38int _parseGraphicsArg(struct SubParser* parser, int option, const char* arg);
 39
 40int parseCommandArgs(struct StartupOptions* opts, int argc, char* const* argv, struct SubParser* subparser) {
 41	memset(opts, 0, sizeof(*opts));
 42	opts->fd = -1;
 43	opts->biosFd = -1;
 44
 45	int ch;
 46	char options[64] =
 47		"b:s:"
 48#ifdef USE_CLI_DEBUGGER
 49		"d"
 50#endif
 51#ifdef USE_GDB_STUB
 52		"g"
 53#endif
 54	;
 55	if (subparser->extraOptions) {
 56		// TODO: modularize options to subparsers
 57		strncat(options, subparser->extraOptions, sizeof(options) - strlen(options) - 1);
 58	}
 59	while ((ch = getopt_long(argc, argv, options, _options, 0)) != -1) {
 60		switch (ch) {
 61		case 'b':
 62			opts->biosFd = open(optarg, O_RDONLY);
 63			break;
 64#ifdef USE_CLI_DEBUGGER
 65		case 'd':
 66			if (opts->debuggerType != DEBUGGER_NONE) {
 67				return 0;
 68			}
 69			opts->debuggerType = DEBUGGER_CLI;
 70			break;
 71#endif
 72#ifdef USE_GDB_STUB
 73		case 'g':
 74			if (opts->debuggerType != DEBUGGER_NONE) {
 75				return 0;
 76			}
 77			opts->debuggerType = DEBUGGER_GDB;
 78			break;
 79#endif
 80		case 's':
 81			opts->frameskip = atoi(optarg);
 82			break;
 83		default:
 84			if (subparser) {
 85				if (!subparser->parse(subparser, ch, optarg)) {
 86					return 0;
 87				}
 88			}
 89			break;
 90		}
 91	}
 92	argc -= optind;
 93	argv += optind;
 94	if (argc == 1) {
 95		opts->fname = argv[0];
 96	} else if (argc == 0) {
 97		opts->fname = _defaultFilename;
 98	} else {
 99		return 0;
100	}
101	opts->fd = open(opts->fname, O_RDONLY);
102	return 1;
103}
104
105void initParserForGraphics(struct SubParser* parser, struct GraphicsOpts* opts) {
106	parser->usage = GRAPHICS_USAGE;
107	parser->opts = opts;
108	parser->parse = _parseGraphicsArg;
109	parser->extraOptions = GRAPHICS_OPTIONS;
110	opts->multiplier = 1;
111	opts->fullscreen = 0;
112	opts->width = 240;
113	opts->height = 160;
114}
115
116int _parseGraphicsArg(struct SubParser* parser, int option, const char* arg) {
117	struct GraphicsOpts* graphicsOpts = parser->opts;
118	switch (option) {
119	case 'f':
120		graphicsOpts->fullscreen = 1;
121		return 1;
122	case '2':
123		if (graphicsOpts->multiplier != 1) {
124			return 0;
125		}
126		graphicsOpts->multiplier = 2;
127		graphicsOpts->width *= graphicsOpts->multiplier;
128		graphicsOpts->height *= graphicsOpts->multiplier;
129		return 1;
130	case '3':
131		if (graphicsOpts->multiplier != 1) {
132			return 0;
133		}
134		graphicsOpts->multiplier = 3;
135		graphicsOpts->width *= graphicsOpts->multiplier;
136		graphicsOpts->height *= graphicsOpts->multiplier;
137		return 1;
138	case '4':
139		if (graphicsOpts->multiplier != 1) {
140			return 0;
141		}
142		graphicsOpts->multiplier = 4;
143		graphicsOpts->width *= graphicsOpts->multiplier;
144		graphicsOpts->height *= graphicsOpts->multiplier;
145		return 1;
146	default:
147		return 0;
148	}
149}
150
151struct ARMDebugger* createDebugger(struct StartupOptions* opts) {
152	union DebugUnion {
153		struct ARMDebugger d;
154#ifdef USE_CLI_DEBUGGER
155		struct CLIDebugger cli;
156#endif
157#ifdef USE_GDB_STUB
158		struct GDBStub gdb;
159#endif
160	};
161
162	union DebugUnion* debugger = malloc(sizeof(union DebugUnion));
163
164	switch (opts->debuggerType) {
165#ifdef USE_CLI_DEBUGGER
166	case DEBUGGER_CLI:
167		CLIDebuggerCreate(&debugger->cli);
168		break;
169#endif
170#ifdef USE_GDB_STUB
171	case DEBUGGER_GDB:
172		GDBStubCreate(&debugger->gdb);
173		GDBStubListen(&debugger->gdb, 2345, 0);
174		break;
175#endif
176	case DEBUGGER_NONE:
177	case DEBUGGER_MAX:
178		free(debugger);
179		return 0;
180		break;
181	}
182
183	return &debugger->d;
184}
185
186void usage(const char* arg0, const char* extraOptions) {
187	printf("usage: %s [option ...] file\n", arg0);
188	puts("\nGeneric options:");
189	puts("  -b, --bios FILE  GBA BIOS file to use");
190#ifdef USE_CLI_DEBUGGER
191	puts("  -d, --debug      Use command-line debugger");
192#endif
193#ifdef USE_GDB_STUB
194	puts("  -g, --gdb        Start GDB session (default port 2345)");
195#endif
196	if (extraOptions) {
197		puts(extraOptions);
198	}
199}