X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fcfgopt.c;fp=src%2Fcfgopt.c;h=553a1457fcae6a25144a02c7fc26795e0adbefec;hp=0000000000000000000000000000000000000000;hb=493e590908a39324651cd2c81323e6969c0b4c4f;hpb=f524001d8739b7cf5efd8e0784a1fa650b4af27b

diff --git a/src/cfgopt.c b/src/cfgopt.c
new file mode 100644
index 0000000..553a145
--- /dev/null
+++ b/src/cfgopt.c
@@ -0,0 +1,108 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include "cfgopt.h"
+
+struct options opt;
+
+int parse_args(int argc, char **argv)
+{
+	int i;
+	char *scrname = 0;
+
+	for(i=1; i<argc; i++) {
+		if(argv[i][0] == '-') {
+			if(strcmp(argv[i], "-music") == 0) {
+				opt.music = 1;
+			} else if(strcmp(argv[i], "-nomusic") == 0) {
+				opt.music = 0;
+			} else if(strcmp(argv[i], "-scr") == 0 || strcmp(argv[i], "-screen") == 0) {
+				scrname = argv[++i];
+			} else {
+				fprintf(stderr, "invalid option: %s\n", argv[i]);
+				return -1;
+			}
+		} else {
+			if(scrname) {
+				fprintf(stderr, "unexpected option: %s\n", argv[i]);
+				return -1;
+			}
+			scrname = argv[i];
+		}
+	}
+
+	opt.start_scr = scrname;
+	return 0;
+}
+
+static char *strip_space(char *s)
+{
+	int len;
+	char *end;
+
+	while(*s && isspace(*s)) ++s;
+	if(!*s) return 0;
+
+	if((end = strrchr(s, '#'))) {
+		--end;
+	} else {
+		len = strlen(s);
+		end = s + len - 1;
+	}
+
+	while(end > s && isspace(*end)) *end-- = 0;
+	return end > s ? s : 0;
+}
+
+static int bool_value(char *s)
+{
+	char *ptr = s;
+	while(*ptr) {
+		*ptr = tolower(*ptr);
+		++ptr;
+	}
+
+	return strcmp(s, "true") == 0 || strcmp(s, "yes") == 0 || strcmp(s, "1") == 0;
+}
+
+int load_config(const char *fname)
+{
+	FILE *fp;
+	char buf[256];
+	int nline = 0;
+
+	if(!(fp = fopen(fname, "rb"))) {
+		return 0;	/* just ignore missing config files */
+	}
+
+	while(fgets(buf, sizeof buf, fp)) {
+		char *line, *key, *value;
+
+		++nline;
+		if(!(line = strip_space(buf))) {
+			continue;
+		}
+
+		if(!(value = strchr(line, '='))) {
+			fprintf(stderr, "%s:%d invalid key/value pair\n", fname, nline);
+			return -1;
+		}
+		*value++ = 0;
+
+		if(!(key = strip_space(line)) || !(value = strip_space(value))) {
+			fprintf(stderr, "%s:%d invalid key/value pair\n", fname, nline);
+			return -1;
+		}
+
+		if(strcmp(line, "music") == 0) {
+			opt.music = bool_value(value);
+		} else if(strcmp(line, "screen") == 0) {
+			opt.start_scr = strdup(value);
+		} else {
+			fprintf(stderr, "%s:%d invalid option: %s\n", fname, nline, line);
+			return -1;
+		}
+	}
+	return 0;
+}