libpicofe/common/config.c

/*
 * Human-readable config file management for PicoDrive
 * (c) notaz, 2008
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#ifdef __EPOC32__
#include <unistd.h>
#endif
#include "config.h"
#include "lprintf.h"

static char *mystrip(char *str);

#ifndef _MSC_VER

#include "menu.h"
#include "emu.h"
#include <Pico/Pico.h>

extern menu_entry opt_entries[];
extern menu_entry opt2_entries[];
extern menu_entry cdopt_entries[];
extern menu_entry ctrlopt_entries[];
extern const int opt_entry_count;
extern const int opt2_entry_count;
extern const int cdopt_entry_count;
extern const int ctrlopt_entry_count;
#ifdef PSP
extern menu_entry opt3_entries[];
extern const int opt3_entry_count;
#endif

static menu_entry *cfg_opts[] =
{
	opt_entries,
	opt2_entries,
	cdopt_entries,
	ctrlopt_entries,
#ifdef PSP
	opt3_entries,
#endif
};

static const int *cfg_opt_counts[] =
{
	&opt_entry_count,
	&opt2_entry_count,
	&cdopt_entry_count,
	&ctrlopt_entry_count,
#ifdef PSP
	&opt3_entry_count,
#endif
};

#define NL "\r\n"


static int seek_sect(FILE *f, const char *section)
{
	char line[128], *tmp;
	int len;

	len = strlen(section);
	// seek to the section needed
	while (!feof(f))
	{
		tmp = fgets(line, sizeof(line), f);
		if (tmp == NULL) break;

		if (line[0] != '[') continue; // not section start
		if (strncmp(line + 1, section, len) == 0 && line[len+1] == ']')
			return 1; // found it
	}

	return 0;
}


static void custom_write(FILE *f, const menu_entry *me, int no_def)
{
	char *str, str24[24];

	switch (me->id)
	{
		case MA_OPT_RENDERER:
			if (no_def && !((defaultConfig.s_PicoOpt^PicoOpt)&POPT_ALT_RENDERER) &&
				!((defaultConfig.EmuOpt^currentConfig.EmuOpt)&0x80)) return;
			if (PicoOpt&POPT_ALT_RENDERER)
				str =
#ifndef PSP
				"8bit "
#endif
				"fast";
			else if (currentConfig.EmuOpt&0x80)
				str =
#ifndef PSP
				"16bit "
#endif
				"accurate";
			else
				str = "8bit accurate";
			fprintf(f, "Renderer = %s", str);
			break;

		case MA_OPT_SCALING:
			if (no_def && defaultConfig.scaling == currentConfig.scaling) return;
#ifdef __GP2X__
			switch (currentConfig.scaling) {
				default: str = "OFF"; break;
				case 1:  str = "hw horizontal";     break;
				case 2:  str = "hw horiz. + vert."; break;
				case 3:  str = "sw horizontal";     break;
			}
			fprintf(f, "Scaling = %s", str);
#endif
			break;
		case MA_OPT_FRAMESKIP:
			if (no_def && defaultConfig.Frameskip == currentConfig.Frameskip) return;
			if (currentConfig.Frameskip < 0)
			     strcpy(str24, "Auto");
			else sprintf(str24, "%i", currentConfig.Frameskip);
			fprintf(f, "Frameskip = %s", str24);
			break;
		case MA_OPT_SOUND_QUALITY:
			if (no_def && !((defaultConfig.s_PicoOpt^PicoOpt)&POPT_EN_STEREO) &&
				defaultConfig.s_PsndRate == PsndRate) return;
			str = (PicoOpt&POPT_EN_STEREO)?"stereo":"mono";
			fprintf(f, "Sound Quality = %i %s", PsndRate, str);
			break;
		case MA_OPT_REGION:
			if (no_def && defaultConfig.s_PicoRegion == PicoRegionOverride &&
				defaultConfig.s_PicoAutoRgnOrder == PicoAutoRgnOrder) return;
			strncpy(str24, me_region_name(PicoRegionOverride, PicoAutoRgnOrder), 23); str24[23] = 0;
			fprintf(f, "Region = %s", mystrip(str24));
			break;
		case MA_OPT_CONFIRM_STATES:
			if (no_def && !((defaultConfig.EmuOpt^currentConfig.EmuOpt)&(5<<9))) return;
			switch ((currentConfig.EmuOpt >> 9) & 5) {
				default: str = "OFF";    break;
				case 1:  str = "writes"; break;
				case 4:  str = "loads";  break;
				case 5:  str = "both";   break;
			}
			fprintf(f, "Confirm savestate = %s", str);
			break;
		case MA_OPT_CPU_CLOCKS:
			if (no_def && defaultConfig.CPUclock == currentConfig.CPUclock) return;
#ifdef __GP2X__
			fprintf(f, "GP2X CPU clocks = %i", currentConfig.CPUclock);
#elif defined(PSP)
			fprintf(f, "PSP CPU clock = %i", currentConfig.CPUclock);
#endif
			break;
		case MA_OPT2_GAMMA:
			if (no_def && defaultConfig.gamma == currentConfig.gamma) return;
			fprintf(f, "Gamma correction = %.3f", (double)currentConfig.gamma / 100.0);
			break;
		case MA_OPT2_SQUIDGEHACK:
			if (no_def && !((defaultConfig.EmuOpt^currentConfig.EmuOpt)&0x0010)) return;
			fprintf(f, "Squidgehack = %i", (currentConfig.EmuOpt&0x0010)>>4);
			break;
		case MA_CDOPT_READAHEAD:
			if (no_def && defaultConfig.s_PicoCDBuffers == PicoCDBuffers) return;
			sprintf(str24, "%i", PicoCDBuffers * 2);
			fprintf(f, "ReadAhead buffer = %s", str24);
			break;
		/* PSP */
		case MA_OPT3_SCALE:
			if (no_def && defaultConfig.scale == currentConfig.scale) return;
			fprintf(f, "Scale factor = %.2f", currentConfig.scale);
			break;
		case MA_OPT3_HSCALE32:
			if (no_def && defaultConfig.hscale32 == currentConfig.hscale32) return;
			fprintf(f, "Hor. scale (for low res. games) = %.2f", currentConfig.hscale32);
			break;
		case MA_OPT3_HSCALE40:
			if (no_def && defaultConfig.hscale40 == currentConfig.hscale40) return;
			fprintf(f, "Hor. scale (for hi res. games) = %.2f", currentConfig.hscale40);
			break;
		case MA_OPT3_FILTERING:
			if (no_def && defaultConfig.scaling == currentConfig.scaling) return;
			fprintf(f, "Bilinear filtering = %i", currentConfig.scaling);
			break;
		case MA_OPT3_GAMMAA:
			if (no_def && defaultConfig.gamma == currentConfig.gamma) return;
			fprintf(f, "Gamma adjustment = %i", currentConfig.gamma);
			break;
		case MA_OPT3_BLACKLVL:
			if (no_def && defaultConfig.gamma2 == currentConfig.gamma2) return;
			fprintf(f, "Black level = %i", currentConfig.gamma2);
			break;
		case MA_OPT3_VSYNC:
			if (no_def && (defaultConfig.EmuOpt&0x12000) == (currentConfig.gamma2&0x12000)) return;
			strcpy(str24, "never");
			if (currentConfig.EmuOpt & 0x2000)
				strcpy(str24, (currentConfig.EmuOpt & 0x10000) ? "sometimes" : "always");
			fprintf(f, "Wait for vsync = %s", str24);
			break;

		default:
			lprintf("unhandled custom_write: %i\n", me->id);
			return;
	}
	fprintf(f, NL);
}


#if PLAT_HAVE_JOY
static const char *joyKeyNames[32] =
{
	"UP", "DOWN", "LEFT", "RIGHT", "b1", "b2", "b3", "b4",
	"b5",  "b6",  "b7",  "b8",  "b9",  "b10", "b11", "b12",
	"b13", "b14", "b15", "b16", "b17", "b19", "b19", "b20",
	"b21", "b22", "b23", "b24", "b25", "b26", "b27", "b28"
};
#endif

static void keys_write(FILE *fn, const char *bind_str, const int binds[32],
		const int def_binds[32], const char * const names[32], int key_count, int no_defaults)
{
	int t, i;
	char act[48], name[32];

	for (t = 0; t < key_count; t++)
	{
		act[0] = act[31] = 0;
		if (no_defaults && binds[t] == def_binds[t])
			continue;
#ifdef __GP2X__
		if (strcmp(names[t], "SELECT") == 0) continue;
#endif
		if (t >= 32 || names[t] == NULL || strcmp(names[t], "???") == 0) {
			if ((t >= '0' && t <= '9') || (t >= 'a' && t <= 'z') || (t >= 'A' && t <= 'Z'))
				sprintf(name, "%c", t);
			else
				sprintf(name, "\\x%02x", t);
		}
		else
			strcpy(name, names[t]);

		if (binds[t] == 0 && def_binds[t] != 0) {
			fprintf(fn, "%s %s =" NL, bind_str, name); // no binds
			continue;
		}

		for (i = 0; i < sizeof(me_ctrl_actions) / sizeof(me_ctrl_actions[0]); i++) {
			if (me_ctrl_actions[i].mask & binds[t]) {
				strncpy(act, me_ctrl_actions[i].name, 31);
				fprintf(fn, "%s %s = player%i %s" NL, bind_str, name,
					((binds[t]>>16)&1)+1, mystrip(act));
			}
		}

		for (i = 0; emuctrl_actions[i].name != NULL; i++) {
			if (emuctrl_actions[i].mask & binds[t]) {
				strncpy(act, emuctrl_actions[i].name, 31);
				fprintf(fn, "%s %s = %s" NL, bind_str, name, mystrip(act));
			}
		}
	}
}


static int default_var(const menu_entry *me)
{
	switch (me->id)
	{
		case MA_OPT_ACC_TIMING:
		case MA_OPT_ACC_SPRITES:
		case MA_OPT_ARM940_SOUND:
		case MA_OPT_6BUTTON_PAD:
		case MA_OPT2_ENABLE_Z80:
		case MA_OPT2_ENABLE_YM2612:
		case MA_OPT2_ENABLE_SN76496:
		case MA_OPT2_SVP_DYNAREC:
		case MA_CDOPT_CDDA:
		case MA_CDOPT_PCM:
		case MA_CDOPT_SAVERAM:
		case MA_CDOPT_SCALEROT_CHIP:
		case MA_CDOPT_BETTER_SYNC:
			return defaultConfig.s_PicoOpt;

		case MA_OPT_SHOW_FPS:
		case MA_OPT_ENABLE_SOUND:
		case MA_OPT_SRAM_STATES:
		case MA_OPT2_A_SN_GAMMA:
		case MA_OPT2_VSYNC:
		case MA_OPT2_GZIP_STATES:
		case MA_OPT2_NO_LAST_ROM:
		case MA_OPT2_RAMTIMINGS:
		case MA_CDOPT_LEDS:
			return defaultConfig.EmuOpt;

		case MA_CTRL_TURBO_RATE: return defaultConfig.turbo_rate;
		case MA_OPT_SCALING:     return defaultConfig.scaling;
		case MA_OPT_ROTATION:    return defaultConfig.rotation;

		case MA_OPT_SAVE_SLOT:
		default:
			return 0;
	}
}

int config_writesect(const char *fname, const char *section)
{
	FILE *fo = NULL, *fn = NULL; // old and new
	int no_defaults = 0; // avoid saving defaults
	menu_entry *me;
	int t, i, tlen, ret;
	char line[128], *tmp;

	if (section != NULL)
	{
		no_defaults = 1;

		fo = fopen(fname, "r");
		if (fo == NULL) {
			fn = fopen(fname, "w");
			goto write;
		}

		ret = seek_sect(fo, section);
		if (!ret) {
			// sect not found, we can simply append
			fclose(fo); fo = NULL;
			fn = fopen(fname, "a");
			goto write;
		}

		// use 2 files..
		fclose(fo);
		rename(fname, "tmp.cfg");
		fo = fopen("tmp.cfg", "r");
		fn = fopen(fname, "w");
		if (fo == NULL || fn == NULL) goto write;

		// copy everything until sect
		tlen = strlen(section);
		while (!feof(fo))
		{
			tmp = fgets(line, sizeof(line), fo);
			if (tmp == NULL) break;

			if (line[0] == '[' && strncmp(line + 1, section, tlen) == 0 && line[tlen+1] == ']')
				break;
			fputs(line, fn);
		}

		// now skip to next sect
		while (!feof(fo))
		{
			tmp = fgets(line, sizeof(line), fo);
			if (tmp == NULL) break;
			if (line[0] == '[') {
				fseek(fo, -strlen(line), SEEK_CUR);
				break;
			}
		}
		if (feof(fo))
		{
			fclose(fo); fo = NULL;
			remove("tmp.cfg");
		}
	}
	else
	{
		fn = fopen(fname, "w");
	}

write:
	if (fn == NULL) {
		if (fo) fclose(fo);
		return -1;
	}
	if (section != NULL)
		fprintf(fn, "[%s]" NL, section);

	for (t = 0; t < sizeof(cfg_opts) / sizeof(cfg_opts[0]); t++)
	{
		me = cfg_opts[t];
		tlen = *(cfg_opt_counts[t]);
		for (i = 0; i < tlen; i++, me++)
		{
			if (!me->need_to_save) continue;
			if ((me->beh != MB_ONOFF && me->beh != MB_RANGE) || me->name == NULL)
				custom_write(fn, me, no_defaults);
			else if (me->beh == MB_ONOFF) {
				if (!no_defaults || ((*(int *)me->var ^ default_var(me)) & me->mask))
					fprintf(fn, "%s = %i" NL, me->name, (*(int *)me->var & me->mask) ? 1 : 0);
			} else if (me->beh == MB_RANGE) {
				if (!no_defaults || (*(int *)me->var ^ default_var(me)))
					fprintf(fn, "%s = %i" NL, me->name, *(int *)me->var);
			}
		}
	}

	// save key config
	keys_write(fn, "bind", currentConfig.KeyBinds, defaultConfig.KeyBinds, keyNames, PLAT_MAX_KEYS, no_defaults);
#if PLAT_HAVE_JOY
	keys_write(fn, "bind_joy0", currentConfig.JoyBinds[0], defaultConfig.JoyBinds[0], joyKeyNames, 32, 1);
	keys_write(fn, "bind_joy1", currentConfig.JoyBinds[1], defaultConfig.JoyBinds[1], joyKeyNames, 32, 1);
	keys_write(fn, "bind_joy2", currentConfig.JoyBinds[2], defaultConfig.JoyBinds[2], joyKeyNames, 32, 1);
	keys_write(fn, "bind_joy3", currentConfig.JoyBinds[3], defaultConfig.JoyBinds[3], joyKeyNames, 32, 1);
#endif

#ifndef PSP
	if (section == NULL)
		fprintf(fn, "Sound Volume = %i" NL, currentConfig.volume);
#endif

	fprintf(fn, NL);

	if (fo != NULL)
	{
		// copy whatever is left
		while (!feof(fo))
		{
			tmp = fgets(line, sizeof(line), fo);
			if (tmp == NULL) break;

			fputs(line, fn);
		}
		fclose(fo);
		remove("tmp.cfg");
	}

	fclose(fn);
	return 0;
}


int config_writelrom(const char *fname)
{
	char line[128], *tmp, *optr = NULL;
	char *old_data = NULL;
	int size;
	FILE *f;

	if (strlen(loadedRomFName) == 0) return -1;

	f = fopen(fname, "r");
	if (f != NULL)
	{
		fseek(f, 0, SEEK_END);
		size = ftell(f);
		fseek(f, 0, SEEK_SET);
		old_data = malloc(size + size/8);
		if (old_data != NULL)
		{
			optr = old_data;
			while (!feof(f))
			{
				tmp = fgets(line, sizeof(line), f);
				if (tmp == NULL) break;
				mystrip(line);
				if (strncasecmp(line, "LastUsedROM", 11) == 0)
					continue;
				sprintf(optr, "%s", line);
				optr += strlen(optr);
			}
		}
		fclose(f);
	}

	f = fopen(fname, "w");
	if (f == NULL) return -1;

	if (old_data != NULL) {
		fwrite(old_data, 1, optr - old_data, f);
		free(old_data);
	}
	fprintf(f, "LastUsedROM = %s" NL, loadedRomFName);
	fclose(f);
	return 0;
}

/* --------------------------------------------------------------------------*/

int config_readlrom(const char *fname)
{
	char line[128], *tmp;
	int i, len, ret = -1;
	FILE *f;

	f = fopen(fname, "r");
	if (f == NULL) return -1;

	// seek to the section needed
	while (!feof(f))
	{
		tmp = fgets(line, sizeof(line), f);
		if (tmp == NULL) break;

		if (strncasecmp(line, "LastUsedROM", 11) != 0) continue;
		len = strlen(line);
		for (i = 0; i < len; i++)
			if (line[i] == '#' || line[i] == '\r' || line[i] == '\n') { line[i] = 0; break; }
		tmp = strchr(line, '=');
		if (tmp == NULL) break;
		tmp++;
		mystrip(tmp);

		len = sizeof(loadedRomFName);
		strncpy(loadedRomFName, tmp, len);
		loadedRomFName[len-1] = 0;
		ret = 0;
		break;
	}
	fclose(f);
	return ret;
}


static int custom_read(menu_entry *me, const char *var, const char *val)
{
	char *tmp;
	int tmpi;

	switch (me->id)
	{
		case MA_OPT_RENDERER:
			if (strcasecmp(var, "Renderer") != 0) return 0;
			if      (strcasecmp(val, "8bit fast") == 0 || strcasecmp(val, "fast") == 0) {
				PicoOpt |=  POPT_ALT_RENDERER;
			}
			else if (strcasecmp(val, "16bit accurate") == 0 || strcasecmp(val, "accurate") == 0) {
				PicoOpt &= ~POPT_ALT_RENDERER;
				currentConfig.EmuOpt |=  0x80;
			}
			else if (strcasecmp(val, "8bit accurate") == 0) {
				PicoOpt &= ~POPT_ALT_RENDERER;
				currentConfig.EmuOpt &= ~0x80;
			}
			else
				return 0;
			return 1;

		case MA_OPT_SCALING:
#ifdef __GP2X__
			if (strcasecmp(var, "Scaling") != 0) return 0;
			if        (strcasecmp(val, "OFF") == 0) {
				currentConfig.scaling = 0;
			} else if (strcasecmp(val, "hw horizontal") == 0) {
				currentConfig.scaling = 1;
			} else if (strcasecmp(val, "hw horiz. + vert.") == 0) {
				currentConfig.scaling = 2;
			} else if (strcasecmp(val, "sw horizontal") == 0) {
				currentConfig.scaling = 3;
			} else
				return 0;
			return 1;
#else
			return 0;
#endif

		case MA_OPT_FRAMESKIP:
			if (strcasecmp(var, "Frameskip") != 0) return 0;
			if (strcasecmp(val, "Auto") == 0)
			     currentConfig.Frameskip = -1;
			else currentConfig.Frameskip = atoi(val);
			return 1;

		case MA_OPT_SOUND_QUALITY:
			if (strcasecmp(var, "Sound Quality") != 0) return 0;
			PsndRate = strtoul(val, &tmp, 10);
			if (PsndRate < 8000 || PsndRate > 44100)
				PsndRate = 22050;
			while (*tmp == ' ') tmp++;
			if        (strcasecmp(tmp, "stereo") == 0) {
				PicoOpt |=  POPT_EN_STEREO;
			} else if (strcasecmp(tmp, "mono") == 0) {
				PicoOpt &= ~POPT_EN_STEREO;
			} else
				return 0;
			return 1;

		case MA_OPT_REGION:
			if (strcasecmp(var, "Region") != 0) return 0;
			if       (strncasecmp(val, "Auto: ", 6) == 0)
			{
				const char *p = val + 5, *end = val + strlen(val);
				int i;
				PicoRegionOverride = PicoAutoRgnOrder = 0;
				for (i = 0; p < end && i < 3; i++)
				{
					while (*p == ' ') p++;
					if        (p[0] == 'J' && p[1] == 'P') {
						PicoAutoRgnOrder |= 1 << (i*4);
					} else if (p[0] == 'U' && p[1] == 'S') {
						PicoAutoRgnOrder |= 4 << (i*4);
					} else if (p[0] == 'E' && p[1] == 'U') {
						PicoAutoRgnOrder |= 8 << (i*4);
					}
					while (*p != ' ' && *p != 0) p++;
					if (*p == 0) break;
				}
			}
			else   if (strcasecmp(val, "Auto") == 0) {
				PicoRegionOverride = 0;
			} else if (strcasecmp(val, "Japan NTSC") == 0) {
				PicoRegionOverride = 1;
			} else if (strcasecmp(val, "Japan PAL") == 0) {
				PicoRegionOverride = 2;
			} else if (strcasecmp(val, "USA") == 0) {
				PicoRegionOverride = 4;
			} else if (strcasecmp(val, "Europe") == 0) {
				PicoRegionOverride = 8;
			} else
				return 0;
			return 1;

		case MA_OPT_CONFIRM_STATES:
			if (strcasecmp(var, "Confirm savestate") != 0) return 0;
			if        (strcasecmp(val, "OFF") == 0) {
				currentConfig.EmuOpt &= ~(5<<9);
			} else if (strcasecmp(val, "writes") == 0) {
				currentConfig.EmuOpt &= ~(5<<9);
				currentConfig.EmuOpt |=   1<<9;
			} else if (strcasecmp(val, "loads") == 0) {
				currentConfig.EmuOpt &= ~(5<<9);
				currentConfig.EmuOpt |=   4<<9;
			} else if (strcasecmp(val, "both") == 0) {
				currentConfig.EmuOpt &= ~(5<<9);
				currentConfig.EmuOpt |=   5<<9;
			} else
				return 0;
			return 1;

		case MA_OPT_CPU_CLOCKS:
#ifdef __GP2X__
			if (strcasecmp(var, "GP2X CPU clocks") != 0) return 0;
#elif defined(PSP)
			if (strcasecmp(var, "PSP CPU clock") != 0) return 0;
#endif
			currentConfig.CPUclock = atoi(val);
			return 1;

		case MA_OPT2_GAMMA:
			if (strcasecmp(var, "Gamma correction") != 0) return 0;
			currentConfig.gamma = (int) (atof(val) * 100.0);
			return 1;

		case MA_OPT2_SQUIDGEHACK:
			if (strcasecmp(var, "Squidgehack") != 0) return 0;
			tmpi = atoi(val);
			if (tmpi) *(int *)me->var |=  me->mask;
			else      *(int *)me->var &= ~me->mask;
			return 1;

		case MA_CDOPT_READAHEAD:
			if (strcasecmp(var, "ReadAhead buffer") != 0) return 0;
			PicoCDBuffers = atoi(val) / 2;
			return 1;

		/* PSP */
		case MA_OPT3_SCALE:
			if (strcasecmp(var, "Scale factor") != 0) return 0;
			currentConfig.scale = atof(val);
			return 1;
		case MA_OPT3_HSCALE32:
			if (strcasecmp(var, "Hor. scale (for low res. games)") != 0) return 0;
			currentConfig.hscale32 = atof(val);
			return 1;
		case MA_OPT3_HSCALE40:
			if (strcasecmp(var, "Hor. scale (for hi res. games)") != 0) return 0;
			currentConfig.hscale40 = atof(val);
			return 1;
		case MA_OPT3_FILTERING:
			if (strcasecmp(var, "Bilinear filtering") != 0) return 0;
			currentConfig.scaling = atoi(val);
			return 1;
		case MA_OPT3_GAMMAA:
			if (strcasecmp(var, "Gamma adjustment") != 0) return 0;
			currentConfig.gamma = atoi(val);
			return 1;
		case MA_OPT3_BLACKLVL:
			if (strcasecmp(var, "Black level") != 0) return 0;
			currentConfig.gamma2 = atoi(val);
			return 1;
		case MA_OPT3_VSYNC:
			if (strcasecmp(var, "Wait for vsync") != 0) return 0;
			if        (strcasecmp(val, "never") == 0) {
				currentConfig.EmuOpt &= ~0x12000;
			} else if (strcasecmp(val, "sometimes") == 0) {
				currentConfig.EmuOpt |=  0x12000;
			} else if (strcasecmp(val, "always") == 0) {
				currentConfig.EmuOpt &= ~0x12000;
				currentConfig.EmuOpt |=  0x02000;
			} else
				return 0;
			return 1;

		default:
			lprintf("unhandled custom_read: %i\n", me->id);
			return 0;
	}
}


static unsigned int keys_encountered = 0;

static void keys_parse(const char *var, const char *val, int binds[32],
	const char * const names[32], int max_keys)
{
	int t, i;
	unsigned int player;

	for (t = 0; t < 32; t++)
	{
		if (names[t] && strcmp(names[t], var) == 0) break;
	}
	if (t == 32)
	{
		int len = strlen(var);
		if (len == 1) t = var[0];
		else if (len >= 4 && var[0] == '\\' && var[1] == 'x') {
			char *p;
			t = (int)strtoul(var + 2, &p, 16);
			if (*p != 0) t = max_keys; // parse failed
		}
		else
			t = max_keys; // invalid
	}
	if (t < 0 || t >= max_keys) {
		lprintf("unhandled bind \"%s\"\n", var);
		return;
	}

	if (binds == currentConfig.KeyBinds && !(keys_encountered & (1<<t))) { // hack
		binds[t] = 0;
		keys_encountered |= 1<<t;
	}
	if (val[0] == 0)
		return;
	if (strncasecmp(val, "player", 6) == 0)
	{
		player = atoi(val + 6) - 1;
		if (player > 1) goto fail;
		for (i = 0; i < sizeof(me_ctrl_actions) / sizeof(me_ctrl_actions[0]); i++) {
			if (strncasecmp(me_ctrl_actions[i].name, val + 8, strlen(val + 8)) == 0) {
				binds[t] |= me_ctrl_actions[i].mask | (player<<16);
				return;
			}
		}
	}
	for (i = 0; emuctrl_actions[i].name != NULL; i++) {
		if (strncasecmp(emuctrl_actions[i].name, val, strlen(val)) == 0) {
			binds[t] |= emuctrl_actions[i].mask;
			return;
		}
	}

fail:
	lprintf("unhandled action \"%s\"\n", val);
	return;
}


#define try_joy_parse(num) { \
	if (strncasecmp(var, "bind_joy"#num " ", 10) == 0) { \
		keys_parse(var + 10, val, currentConfig.JoyBinds[num], joyKeyNames, 32); \
		return; \
	} \
}

static void parse(const char *var, const char *val)
{
	menu_entry *me;
	int t, i, tlen, tmp, ret = 0;

	if (strcasecmp(var, "LastUsedROM") == 0)
		return; /* handled elsewhere */

	if (strcasecmp(var, "Sound Volume") == 0) {
		currentConfig.volume = atoi(val);
		return;
	}

	// key binds
	if (strncasecmp(var, "bind ", 5) == 0) {
		keys_parse(var + 5, val, currentConfig.KeyBinds, keyNames, PLAT_MAX_KEYS);
		return;
	}
#if PLAT_HAVE_JOY
	try_joy_parse(0)
	try_joy_parse(1)
	try_joy_parse(2)
	try_joy_parse(3)
#endif

	for (t = 0; t < sizeof(cfg_opts) / sizeof(cfg_opts[0]) && ret == 0; t++)
	{
		me = cfg_opts[t];
		tlen = *(cfg_opt_counts[t]);
		for (i = 0; i < tlen && ret == 0; i++, me++)
		{
			if (!me->need_to_save) continue;
			if (me->name != NULL) {
				if (strcasecmp(var, me->name) != 0) continue; // surely not this one
				if (me->beh == MB_ONOFF) {
					tmp = atoi(val);
					if (tmp) *(int *)me->var |=  me->mask;
					else     *(int *)me->var &= ~me->mask;
					return;
				} else if (me->beh == MB_RANGE) {
					tmp = atoi(val);
					if (tmp < me->min) tmp = me->min;
					if (tmp > me->max) tmp = me->max;
					*(int *)me->var = tmp;
					return;
				}
			}
			ret = custom_read(me, var, val);
		}
	}
	if (!ret) lprintf("config_readsect: unhandled var: \"%s\"\n", var);
}


int config_havesect(const char *fname, const char *section)
{
	FILE *f;
	int ret;

	f = fopen(fname, "r");
	if (f == NULL) return 0;

	ret = seek_sect(f, section);
	fclose(f);
	return ret;
}

int config_readsect(const char *fname, const char *section)
{
	char line[128], *var, *val;
	FILE *f;
	int ret;

	f = fopen(fname, "r");
	if (f == NULL) return -1;

	if (section != NULL)
	{
		ret = seek_sect(f, section);
		if (!ret) {
			lprintf("config_readsect: %s: missing section [%s]\n", fname, section);
			fclose(f);
			return -1;
		}
	}

	keys_encountered = 0;

	while (!feof(f))
	{
		ret = config_get_var_val(f, line, sizeof(line), &var, &val);
		if (ret ==  0) break;
		if (ret == -1) continue;

		parse(var, val);
	}

	fclose(f);
	return 0;
}

#endif // _MSC_VER

static char *mystrip(char *str)
{
	int i, len;

	len = strlen(str);
	for (i = 0; i < len; i++)
		if (str[i] != ' ') break;
	if (i > 0) memmove(str, str + i, len - i + 1);

	len = strlen(str);
	for (i = len - 1; i >= 0; i--)
		if (str[i] != ' ') break;
	str[i+1] = 0;

	return str;
}

/* returns:
 *  0 - EOF, end
 *  1 - parsed ok
 * -1 - failed to parse line
 */
int config_get_var_val(void *file, char *line, int lsize, char **rvar, char **rval)
{
	char *var, *val, *tmp;
	FILE *f = file;
	int len, i;

	tmp = fgets(line, lsize, f);
	if (tmp == NULL) return 0;

	if (line[0] == '[') return 0; // other section

	// strip comments, linefeed, spaces..
	len = strlen(line);
	for (i = 0; i < len; i++)
		if (line[i] == '#' || line[i] == '\r' || line[i] == '\n') { line[i] = 0; break; }
	mystrip(line);
	len = strlen(line);
	if (len <= 0) return -1;;

	// get var and val
	for (i = 0; i < len; i++)
		if (line[i] == '=') break;
	if (i >= len || strchr(&line[i+1], '=') != NULL) {
		lprintf("config_readsect: can't parse: %s\n", line);
		return -1;
	}
	line[i] = 0;
	var = line;
	val = &line[i+1];
	mystrip(var);
	mystrip(val);

#ifndef _MSC_VER
	if (strlen(var) == 0 || (strlen(val) == 0 && strncasecmp(var, "bind", 4) != 0)) {
		lprintf("config_readsect: something's empty: \"%s\" = \"%s\"\n", var, val);
		return -1;;
	}
#endif

	*rvar = var;
	*rval = val;
	return 1;
}