Implement compiler (obc)

obc.c

@@ -0,0 +1,121 @@
+/* obc.c
+ * Created: 2024-12-03
+ * Author: Aryadev Chavali
+ * Description: Entrypoint of compiler
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "./assembler.h"
+#include "./lib.h"
+#include "./parser.h"
+
+void usage(const char *name, FILE *fp)
+{
+  fprintf(
+      fp,
+      "Usage: %s [-s ASM-NAME | -c OBJ-NAME | -o EXEC-NAME] FILE\n"
+      "\tGiven BrainFuck source code FILE, compile it.\n"
+      "\tOptions:\n"
+      "\t\t-s ASM-NAME: Transpile to assembly, store in ASM-NAME\n"
+      "\t\t-c OBJ-NAME: Transpile and assemble, store in OBJ-NAME\n"
+      "\t\t-o EXEC-NAME: Transpile, assemble and link, store in EXEC-NAME\n",
+      name);
+}
+
+struct Config
+{
+  char *prog_name, *asm_name, *obj_name, *exec_name;
+};
+
+int parse_config(struct Config *config, int argc, char *argv[])
+{
+  for (int i = 1; i < argc; ++i)
+  {
+    size_t size = strlen(argv[i]);
+    if (argv[i][0] == '-')
+    {
+      if (size > 2 || !strspn(argv[i] + 1, "cso") || i == argc - 1)
+        return 0;
+      switch (argv[i][1])
+      {
+      case 's':
+        config->asm_name = argv[i + 1];
+        ++i;
+        break;
+      case 'c':
+        config->obj_name = argv[i + 1];
+        ++i;
+        break;
+      case 'o':
+        config->exec_name = argv[i + 1];
+        ++i;
+        break;
+      }
+    }
+    else
+      config->prog_name = argv[i];
+  }
+  if (!config->prog_name)
+    return 0;
+  return 1;
+}
+
+int main(int argc, char *argv[])
+{
+  if (argc == 1)
+  {
+    usage(argv[0], stderr);
+    return 1;
+  }
+
+  struct Config config = {0};
+  int ret              = parse_config(&config, argc, argv);
+  if (!ret)
+  {
+    usage(argv[0], stderr);
+    goto end;
+  }
+  ret = 0;
+
+  char *file_data  = NULL;
+  buffer_t *buffer = NULL, *asm_buffer = NULL;
+  struct PResult res = {0};
+
+  FILE *handle = fopen(config.prog_name, "r");
+  if (!handle)
+  {
+    fprintf(stderr, "ERROR: Could not open \"%s\"\n", config.prog_name);
+    ret = 1;
+    goto end;
+  }
+  file_data = fread_all(handle);
+  fclose(handle);
+  buffer = buffer_init_str(config.prog_name, file_data, strlen(file_data));
+  res    = parse_buffer(buffer);
+
+  if (res.nodes == NULL)
+  {
+    fputs("[WARNING]: Empty source file.", stderr);
+    ret = 1;
+    goto end;
+  }
+
+  asm_setup_buffer(&asm_buffer, config.asm_name ? config.asm_name : "a.asm");
+  asm_translate_nodes(&asm_buffer, res, config.prog_name);
+  asm_write(&asm_buffer);
+  asm_assemble(asm_buffer->name, config.obj_name ? config.obj_name : "a.o");
+  asm_link(config.obj_name ? config.obj_name : "a.o",
+           config.exec_name ? config.exec_name : "a.out");
+end:
+  if (asm_buffer)
+    free(asm_buffer);
+  if (res.nodes)
+    free(res.nodes);
+  if (buffer)
+    free(buffer);
+  if (file_data)
+    free(file_data);
+  return ret;
+}