89b6c47e04
See #6113 for an alternate way of doing this that we didn't end up following. Closes #6079. I also took the opportunity here to extract C.zig and Elf.zig from link.zig.
102 lines
2.9 KiB
Zig
102 lines
2.9 KiB
Zig
const std = @import("std");
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const mem = std.mem;
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const assert = std.debug.assert;
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const Allocator = std.mem.Allocator;
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const Module = @import("../Module.zig");
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const fs = std.fs;
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const codegen = @import("../codegen/c.zig");
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const link = @import("../link.zig");
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const File = link.File;
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const C = @This();
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pub const base_tag: File.Tag = .c;
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base: File,
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header: std.ArrayList(u8),
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constants: std.ArrayList(u8),
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main: std.ArrayList(u8),
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called: std.StringHashMap(void),
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need_stddef: bool = false,
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need_stdint: bool = false,
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error_msg: *Module.ErrorMsg = undefined,
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pub fn openPath(allocator: *Allocator, dir: fs.Dir, sub_path: []const u8, options: link.Options) !*File {
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assert(options.object_format == .c);
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const file = try dir.createFile(sub_path, .{ .truncate = true, .read = true, .mode = link.determineMode(options) });
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errdefer file.close();
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var c_file = try allocator.create(C);
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errdefer allocator.destroy(c_file);
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c_file.* = C{
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.base = .{
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.tag = .c,
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.options = options,
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.file = file,
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.allocator = allocator,
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},
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.main = std.ArrayList(u8).init(allocator),
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.header = std.ArrayList(u8).init(allocator),
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.constants = std.ArrayList(u8).init(allocator),
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.called = std.StringHashMap(void).init(allocator),
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};
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return &c_file.base;
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}
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pub fn fail(self: *C, src: usize, comptime format: []const u8, args: anytype) error{ AnalysisFail, OutOfMemory } {
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self.error_msg = try Module.ErrorMsg.create(self.base.allocator, src, format, args);
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return error.AnalysisFail;
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}
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pub fn deinit(self: *C) void {
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self.main.deinit();
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self.header.deinit();
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self.constants.deinit();
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self.called.deinit();
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}
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pub fn updateDecl(self: *C, module: *Module, decl: *Module.Decl) !void {
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codegen.generate(self, decl) catch |err| {
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if (err == error.AnalysisFail) {
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try module.failed_decls.put(module.gpa, decl, self.error_msg);
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}
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return err;
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};
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}
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pub fn flush(self: *C, module: *Module) !void {
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const writer = self.base.file.?.writer();
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try writer.writeAll(@embedFile("cbe.h"));
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var includes = false;
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if (self.need_stddef) {
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try writer.writeAll("#include <stddef.h>\n");
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includes = true;
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}
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if (self.need_stdint) {
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try writer.writeAll("#include <stdint.h>\n");
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includes = true;
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}
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if (includes) {
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try writer.writeByte('\n');
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}
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if (self.header.items.len > 0) {
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try writer.print("{}\n", .{self.header.items});
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}
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if (self.constants.items.len > 0) {
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try writer.print("{}\n", .{self.constants.items});
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}
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if (self.main.items.len > 1) {
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const last_two = self.main.items[self.main.items.len - 2 ..];
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if (std.mem.eql(u8, last_two, "\n\n")) {
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self.main.items.len -= 1;
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}
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}
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try writer.writeAll(self.main.items);
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self.base.file.?.close();
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self.base.file = null;
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}
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