From 36e990c5bdfffb145b7255b8159d3ac879344996 Mon Sep 17 00:00:00 2001
From: Nic Gaffney <gaffney_nic@protonmail.com>
Date: Thu, 27 Jun 2024 01:58:31 -0500
Subject: Initial commit

---
 src/main.zig     | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/tokenize.zig | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 130 insertions(+)
 create mode 100644 src/main.zig
 create mode 100644 src/tokenize.zig

(limited to 'src')

diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..18239b1
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,64 @@
+const std = @import("std");
+const tok = @import("tokenize.zig");
+
+const gftCompilerError = error{NoInputFile};
+
+pub fn main() !void {
+    if (std.os.argv.len != 2) return gftCompilerError.NoInputFile;
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    var args = std.process.args();
+    _ = args.skip();
+    const inputFileName = args.next();
+    const inputFile = try std.fs.cwd().openFile(inputFileName.?, .{});
+    defer inputFile.close();
+
+    std.fs.cwd().makeDir("out") catch |err| {
+        if (err != error.PathAlreadyExists) return err;
+    };
+    const outfile = try std.fs.cwd().createFile("out/out.asm", .{});
+    const outWriter = outfile.writer();
+    defer outfile.close();
+
+    // Logic here to compile language
+    const all = try inputFile.readToEndAlloc(gpa.allocator(), 2048);
+    defer gpa.allocator().free(all);
+
+    const toks = try tok.tokenize(gpa.allocator(), all);
+    defer gpa.allocator().free(toks);
+    var tokIter = tok.TokenIterator{ .tokens = toks };
+    try outWriter.print("global _start:\n", .{});
+    while (tokIter.next()) |t| {
+        switch (t) {
+            .ret => {
+                const num = tokIter.next();
+                switch (num.?) {
+                    .intLit => {},
+                    else => break,
+                }
+                switch (tokIter.next().?) {
+                    .semiCol => {},
+                    else => break,
+                }
+                try outWriter.print(
+                    \\  mov rax, 60
+                    \\  mov rdi, {}
+                    \\  syscall
+                    \\
+                , .{num.?.intLit});
+                gpa.allocator().free(t.ret);
+            },
+            else => {},
+        }
+    }
+
+    const nasmargv = [_][]const u8{ "nasm", "-felf64", "out/out.asm" };
+    const nasmproc = try std.ChildProcess.run(.{ .argv = &nasmargv, .allocator = gpa.allocator() });
+    defer gpa.allocator().free(nasmproc.stdout);
+    defer gpa.allocator().free(nasmproc.stderr);
+
+    const ldargv = [_][]const u8{ "ld", "-o", "out/out", "out/out.o" };
+    const ldproc = try std.ChildProcess.run(.{ .argv = &ldargv, .allocator = gpa.allocator() });
+    defer gpa.allocator().free(ldproc.stdout);
+    defer gpa.allocator().free(ldproc.stderr);
+}
diff --git a/src/tokenize.zig b/src/tokenize.zig
new file mode 100644
index 0000000..b5d5d23
--- /dev/null
+++ b/src/tokenize.zig
@@ -0,0 +1,66 @@
+const std = @import("std");
+
+const TokenError = error{UnknownToken};
+
+const Token = union(enum) {
+    ret: []const u8,
+    intLit: i32,
+    semiCol: u8,
+    nil: void,
+};
+
+pub const TokenIterator = struct {
+    tokens: []const Token,
+    index: usize = 0,
+
+    pub fn next(self: *TokenIterator) ?Token {
+        defer self.*.index = self.*.index + 1;
+        if (self.*.index >= self.*.tokens.len) return null;
+        return self.*.tokens[self.*.index];
+    }
+};
+
+pub fn tokenize(allocator: std.mem.Allocator, buff: []const u8) ![]const Token {
+    var toks = std.ArrayList(Token).init(allocator);
+    defer toks.deinit();
+    var str = std.ArrayList(u8).init(allocator);
+    defer str.deinit();
+
+    var i: u32 = 0;
+    while (i < buff.len) {
+        switch (buff[i]) {
+            ' ', '\n', '\t' => {
+                i = i + 1;
+                continue;
+            },
+            '0'...'9' => {
+                while (std.ascii.isDigit(buff[i])) {
+                    try str.append(buff[i]);
+                    i = i + 1;
+                }
+                const num: i32 = try std.fmt.parseInt(i32, str.items, 10);
+                try toks.append(.{ .intLit = num });
+                str.deinit();
+                str = std.ArrayList(u8).init(allocator);
+            },
+            'a'...'z', 'A'...'Z' => {
+                while (std.ascii.isAlphanumeric(buff[i])) {
+                    try str.append(buff[i]);
+                    i = i + 1;
+                }
+                try toks.append(.{ .ret = try str.toOwnedSlice() });
+                str.deinit();
+                str = std.ArrayList(u8).init(allocator);
+            },
+            ';' => {
+                i = i + 1;
+                try toks.append(.{ .semiCol = ';' });
+            },
+            '+', '-', '*', '/' => {
+                // Process operator
+            },
+            else => {},
+        }
+    }
+    return toks.toOwnedSlice();
+}
-- 
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