Add a README, replace the shell script with C code. Add a LICENSE.

1 files changed, 40 insertions, 1 deletions

diff --git a/src/bfc.c b/src/bfc.c
index d567f88..fc7d29d 100644
--- a/src/bfc.c
+++ b/src/bfc.c
@@ -1,16 +1,55 @@
 #include "all.h"
 #include "str.h"
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
 
 int main(void) {
   str input = {0};
   str_append_fread(&input, stdin);
+
+  // Run the lexer to get tokens (honestly useless considering the simplicity of
+  // BF)
   lexer_t lexer = lex_init(&input);
   lex_run(&lexer);
+
+  // Run the parser and turn tokens into an AST representation
   parser_t p = parser_init(&lexer);
   ast_node_t *ast = parse_program(&p);
   str c_code = gen_code(ast);
+
+  // Run gcc
+  int fd[2];
+  pipe(fd);
+
+  if (fork() == 0) {
+    dup2(fd[0], STDIN_FILENO);
+    close(fd[0]);
+    close(fd[1]);
+
+    char *argv[] = {"gcc",       "-Os",
+                    "-flto",     "-fuse-linker-plugin",
+                    "-DNDEBUG",  "-fomit-frame-pointer",
+                    "-nostdlib", "-nostartfiles",
+                    "-no-pie",   "-fno-stack-protector",
+                    "-o",        "/proc/self/fd/1",
+                    "-x",        "c",
+                    "-",         NULL};
+
+    execvp("gcc", argv);
+    perror("execvp");
+    _exit(1);
+  }
+
+  // Cleanup
+  close(fd[0]);
+  write(fd[1], c_code.data, strlen(c_code.data));
+  close(fd[1]);
+  wait(NULL);
+
   ast_free(ast);
-  printf("%s", c_code.data);
   free_str(&input);
   return 0;
 }