init

grammar/parser.c

@@ -0,0 +1,42 @@
+#include <stdio.h>
+
+#define false 0
+#define true 1
+_Bool reached_EOF = false;
+#define YY_INPUT(buf, result, max_size)                \
+	{                                                  \
+		int yyc = getchar();                           \
+		if (yyc == EOF) {                              \
+			reached_EOF = true;                        \
+			fprintf(stdout, "EOF");                    \
+		} else {                                       \
+			fprintf(stdout, "%c", yyc);                \
+		}                                              \
+		result = (EOF == yyc) ? 0 : (*(buf) = yyc, 1); \
+	}
+
+#include "peg.c"
+
+int main(int argc, char** argv) {
+	if (argc < 2) {
+		fprintf(stderr, "usage: %s filen.fang [output/file]\n", *argv);
+		return -1;
+	}
+	freopen(argv[1], "r", stdin);
+	if (!stdin) {
+		fprintf(stderr, "file %s not found\n", argv[1]);
+		return -2;
+	}
+	_Bool newline = true;
+	if (argc >= 3) {
+		freopen(argv[2], "w", stdout);
+		if (!stdout) {
+			fprintf(stderr, "file %s not found\n", argv[2]);
+			return -2;
+		}
+		newline = false;
+	}
+	while (yyparse());
+	if (newline) printf("\n");
+	return !reached_EOF;
+}