Initial commit

Makefile

@@ -0,0 +1,6 @@
+SRC_Files=$(wildcard src/*.c)
+CC=clang
+CF=-Wall -g
+
+install:
+	$(CC) $(CF) $(SRC_Files) -o brainfuck

examples/helloworld.bf

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+++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.

rules.txt

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+INST = + | - | < | > | . | , | LOOP
+LOOP = [INST]
+

src/main.c

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+#include <stdio.h>
+#include <stdlib.h>
+
+unsigned char cells[1024];
+unsigned char *ptr = cells;
+
+void error(char c) {
+   fprintf(stderr, "ERROR: Unexpected token, %c\n", c);
+   exit(1);
+}
+
+char *parse(char *src) {
+
+   char *start = src;
+
+   while (*src != '\0') {
+      switch (*src) {
+         case 0: return NULL;
+         case '.': printf("%c", (*ptr)); break;
+         case ',': *ptr = getc(stdin); break;
+         case '+': (*ptr)++; break;
+         case '-': (*ptr)--; break;
+         case '>': ptr++; break;
+         case '<': ptr--; break;
+         case '[': src = parse(++src); break;
+         case ']': 
+            if (*ptr == 0) return src;
+            src = start;
+            continue;
+      }
+
+      src++;
+   }
+
+   return NULL;
+}
+
+int main(int argc, char *argv[]) {
+
+   if (argc != 2) return 1;
+
+   FILE *file = fopen(argv[1], "r");
+   if (!file) return 1;
+
+   fseek(file, 0, SEEK_END);
+   size_t size = ftell(file);
+   rewind(file);
+
+   char *src = malloc(size);
+   fread(src, 1, size, file);
+
+   if (parse(src) != NULL) {
+      error('[');
+   }
+
+   return 0;
+}

test.bf

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+,.