From 249fb9ba4de5d1a7b562ce1d6c66d526f729cffb Mon Sep 17 00:00:00 2001
From: Aaron Taylor <ataylor@subgeniuskitty.com>
Date: Tue, 2 Jul 2019 14:56:49 -0700
Subject: [PATCH] Added compiler for pseudo-VVhitespace -> VVhitespace.

---
 Makefile      |  22 ++++++++++
 vv_compiler.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 136 insertions(+)
 create mode 100644 Makefile
 create mode 100644 vv_compiler.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5ff4f11
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,22 @@
+# (c) 2019 Aaron Taylor <ataylor at subgeniuskitty dot com>
+# All rights reserved.
+
+####################################################################################################
+# Configuration
+
+CC              = cc
+CC_FLAGS        = -Wall -std=c99
+
+####################################################################################################
+# Build
+
+all: vvc vvi
+
+vvi:
+	$(CC) $(CC_FLAGS) -o $@ vv_interpreter.c
+
+vvc:
+	$(CC) $(CC_FLAGS) -o $@ vv_compiler.c
+
+clean:
+	@rm -f vvc vvc.core vvi vvi.core
diff --git a/vv_compiler.c b/vv_compiler.c
new file mode 100644
index 0000000..3153eee
--- /dev/null
+++ b/vv_compiler.c
@@ -0,0 +1,114 @@
+/*
+ * (c) 2019 Aaron Taylor <ataylor at subgeniuskitty dot com>
+ * All rights reserved.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <getopt.h>
+#include <stdint.h>
+
+#define VERSION 1
+
+void
+print_usage(char ** argv)
+{
+    printf( "VVhitespace Interpreter v%d (www.subgeniuskitty.com)\n"
+            "Usage: %s -i <file> -o <file>\n"
+            "  -h         Help (prints this message)\n"
+            "  -i <file>  Specify a pseudo-VVhitespace source file as input.\n"
+            "  -o <file>  Specify location for VVhitespace output.\n"
+            , VERSION, argv[0]
+    );
+}
+
+int
+main(int argc, char ** argv)
+{
+    /*
+     * Process command line arguments
+     */
+    int c;
+    FILE * input = NULL, * output = NULL;
+    while ((c = getopt(argc,argv,"i:o:h")) != -1) {
+        switch (c) {
+            case 'i':
+                if ((input = fopen(optarg, "r")) == NULL) {
+                    fprintf(stderr, "ERROR: %s: %s\n", optarg, strerror(errno));
+                }
+                break;
+            case 'o':
+                if ((output = fopen(optarg, "w+")) == NULL) {
+                    fprintf(stderr, "ERROR: %s: %s\n", optarg, strerror(errno));
+                }
+                break;
+            case 'h':
+                print_usage(argv);
+                exit(EXIT_SUCCESS);
+                break;
+            default:
+                break;
+        }
+    }
+    if (input == NULL) {
+        fprintf(stderr, "ERROR: Must specify a pseudo-VVhitespace source file with -i flag.\n");
+        print_usage(argv);
+        exit(EXIT_FAILURE);
+    }
+    if (output == NULL) {
+        fprintf(stderr, "ERROR: Must specify destination for VVhitespace source file with -o flag.\n");
+        print_usage(argv);
+        exit(EXIT_FAILURE);
+    }
+
+    /*
+     * Main Loop
+     */
+    uint8_t temp_byte;
+    while (fread(&temp_byte, 1, 1, input)) {
+        switch (temp_byte) {
+            case 't':
+            case 'T':
+                temp_byte = '\t';
+                fwrite(&temp_byte, 1, 1, output);
+                break;
+            case 's':
+            case 'S':
+                temp_byte = ' ';
+                fwrite(&temp_byte, 1, 1, output);
+                break;
+            case 'n':
+            case 'N':
+                temp_byte = '\n';
+                fwrite(&temp_byte, 1, 1, output);
+                break;
+            case 'v':
+            case 'V':
+                temp_byte = '\v';
+                fwrite(&temp_byte, 1, 1, output);
+                break;
+            case '\n':
+                /* Intentionally empty */
+                break;
+            default:
+                /* The first non-[tTsSnNvV] character begins a comment lasting until end of line. */
+                while (fread(&temp_byte, 1, 1, input)) {
+                    if (temp_byte == '\n') break;
+                }
+                break;
+        }
+    }
+
+    /*
+     * Cleanup and exit
+     */
+    fclose(input);
+    fclose(output);
+
+    printf("Successfully converted source code.\n");
+
+    exit(EXIT_SUCCESS);
+}
-- 
2.20.1