Start parsing command line arguments

Add Cli struct
Create cargo binary crate
2026-08-29 12:48:47 -04:00 · 2026-08-21 23:15:42 -04:00 · 2026-08-20 16:21:00 -04:00 · 2026-08-20 16:16:46 -04:00
34 changed files with 88 additions and 1550 deletions
@@ -1,6 +1 @@
-*.bmp
-*.png
-/.propane*
-/.rscons*
-/build/
-/fart
+/target/
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "fart"
+version = "0.1.0"
@@ -0,0 +1,6 @@
+[package]
+name = "fart"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
@@ -1,7 +0,0 @@
-.PHONY: all
-all:
-	@./rscons
-
-.PHONY: clean
-clean:
-	@./rscons clean
@@ -1,27 +0,0 @@
-configure do
-  check_cxx_compiler "clang++"
-  check_cfg package: "libpng"
-end
-
-class Propane < Builder
-  def run(options)
-    @sources += ["propane"] unless @sources.include?("propane")
-    if @command
-      finalize_command
-    else
-      command = %W[./propane -w --log #{@target}.log #{@sources.first} #{@target}]
-      standard_command("Propane <target>#{@target}<reset>", command, options)
-    end
-  end
-end
-
-env do |env|
-  env.add_builder(Propane)
-  env["CCFLAGS"] += %w[-Wall -O2 -std=c++23 -include fart/common.h]
-  env["CPPPATH"] += %W[src #{env.build_root}/src]
-
-  env.Propane("^/src/fart/propane.cpp", "src/fart.propane")
-  env.barrier
-  sources = glob("src/**/*.cpp") + ["#{env.build_root}/src/fart/propane.cpp"]
-  env.Program("fart", sources)
-end
@@ -1,2 +0,0 @@
-#!/bin/sh
-exec ./rscons configure "$@"
@@ -1,27 +0,0 @@
-" Vim syntax file
-
-" Setup
-if version >= 600
-  " Quit when a syntax file was already loaded
-  if exists("b:current_syntax")
-    finish
-  endif
-endif
-
-syn case match
-
-syn keyword fartKeywords ambient ambient_occlusion color define diffuse exposure height jitter look_at material max_depth multisample ngon offset polygon position radius reflectance refraction rotate scale shininess size specular texture translate transparency union up vfov width
-syn keyword fartObjects box camera cyl extrude intersect light options plane scene shape sphere subtract union
-syn keyword fartControl for while if else elsif local
-syn match fartNumber "\(^\|\W\)\@<=[+-]\=\(\d\+\)\=\.\=\d\+\([eE][+-]\=\d\+\)\="
-syn match fartComment "#.*"
-syn match fartIdentifier "\$[a-zA-Z_][a-zA-Z_0-9]*"
-
-hi def link fartKeywords    Operator
-hi def link fartObjects     Type
-hi def link fartNumber      Number
-hi def link fartComment     Comment
-hi def link fartControl     Special
-hi def link fartIdentifier  Identifier
-
-let b:current_syntax = "fart"
@@ -1,3 +0,0 @@
-if has("autocmd")
-  autocmd BufRead *.fart set syntax=fart
-endif " has("autocmd")
@@ -0,0 +1 @@
+target/debug/fart
@@ -1,45 +0,0 @@
-#!/usr/bin/env ruby
-
-# The MIT License (MIT)
-#
-# Copyright (c) 2010-2026 Josh Holtrop
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
-
-
-script = File.join(File.dirname(__FILE__), ".propane-5.2.0-58c963344c9bc893689cbae5e4c49b1b.rb")
-unless File.exist?(script)
-  if File.read(__FILE__, mode: "rb") =~ /^#==>(.*)/
-    require "zlib"
-    require "base64"
-    encoded_compressed = $1
-    unescaped_compressed = Base64.decode64(encoded_compressed)
-    inflated = Zlib::Inflate.inflate(unescaped_compressed)
-    File.open(script, "wb") do |fh|
-      fh.write(inflated)
-    end
-  else
-    raise "Could not decompress."
-  end
-end
-load script
-if __FILE__ == $0
-  Propane::CLI.new.run(ARGV)
-end
-#==>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 truncated
@@ -1,538 +0,0 @@
-#!/usr/bin/env ruby
-
-# Copyright (c) 2013-2025 Josh Holtrop
-#
-# MIT License
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-
-BASE64CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
-
-def base64_decode(s)
-  out = ""
-  v = 0
-  bits = 0
-  s.each_char do |c|
-    if cv = BASE64CHARS.index(c)
-      v = (v << 6) | cv
-      bits += 6
-    elsif c == "="
-      break
-    end
-    if bits >= 8
-      out += (v >> (bits - 8)).chr
-      v &= 0xFFFFFFFF >> (32 - (bits - 8))
-      bits -= 8
-    end
-  end
-  out
-end
-
-script = File.join(File.dirname(__FILE__), ".rscons-3.4.2-b1e276fdbe6b603498fe893d904fe368.rb")
-unless File.exist?(script)
-  if File.read(__FILE__, mode: "rb") =~ /^#==>(.*)/m
-    require "zlib"
-    encoded_compressed = $1
-    compressed = base64_decode(encoded_compressed)
-    if ENV["rscons_dist_specs"]
-      require "digest/md5"
-      if Digest::MD5.hexdigest(compressed) != "b1e276fdbe6b603498fe893d904fe368"
-        raise "Hash mismatch when decompressing rscons executable"
-      end
-    end
-    inflated = Zlib::Inflate.inflate(compressed)
-    File.open(script, "wb") do |fh|
-      fh.write(inflated)
-    end
-  else
-    raise "Error expanding rscons executable"
-  end
-end
-load script
-if __FILE__ == $0
-  Rscons::Cli.new.run(ARGV)
-end
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-
@@ -0,0 +1,57 @@
+macro_rules! options {
+    ($($name:ident $sflag:literal $lflag:literal $hasarg:literal),* $(,)?) => {
+        enum Options {
+            $($name,)*
+        }
+
+        const SHORT_FLAGS: &[&str] = &[
+            $($sflag,)*
+        ];
+
+        const LONG_FLAGS: &[&str] = &[
+            $($lflag,)*
+        ];
+
+        const HAS_ARG: &[bool] = &[
+            $($hasarg,)*
+        ];
+    };
+}
+
+options! {
+    Width "w" "width" true,
+    Height "h" "height" true,
+}
+
+#[derive(Default)]
+pub struct Cli {
+    width: Option<usize>,
+    height: Option<usize>,
+    input_file: String,
+}
+
+impl Cli {
+    pub fn new() -> Self {
+        Cli::default()
+    }
+
+    pub fn run(&mut self) -> Option<()> {
+        let mut args = std::env::args();
+        /* Skip program name. */
+        args.next();
+        loop {
+            if let Some(arg) = args.next() {
+                if arg.starts_with("--") {
+                    let flag = &arg[2..];
+                } else if arg.starts_with("-") {
+                    let flag = &arg[1..2];
+                } else {
+                    self.input_file = arg;
+                }
+            } else {
+                break;
+            }
+        }
+        Some(())
+    }
+}
@@ -1,134 +0,0 @@
-tree;
-tree_prefix P;
-ptype double;
-
-<<header
-/* User terminate codes. */
-#define PARSER_TERMINATE_NUMBER_RANGE 1u
->>
-
-<<
-#include <charconv>
-
-/* Store the numeric value of the matched text in *out. Returns false if the
- * value cannot be represented. */
-static bool parse_number(uint8_t const * match_text, size_t match_length, double * out)
-{
-    const char * first = (const char *)match_text;
-    const char * last = first + match_length;
-    std::from_chars_result r = std::from_chars(first, last, *out);
-    return (r.ec == std::errc()) && (r.ptr == last);
-}
->>
-
-drop /\s+/;
-drop /#.*/;
-
-token background;
-token box;
-token camera;
-token color;
-token comma /,/;
-token cyl;
-token gt />/;
-token height;
-token intersect;
-token lcurly /\{/;
-token lt /</;
-token material;
-token options;
-token plane;
-token position;
-token rcurly /\}/;
-token rotate;
-token scale;
-token size;
-token sphere;
-token subtract;
-token target;
-token translate;
-token union;
-token up;
-token width;
-
-token uint /\d+/ <<
-    if (!parse_number(match_text, match_length, &$$))
-    {
-        $terminate(PARSER_TERMINATE_NUMBER_RANGE);
-    }
->>
-token number /-?\d+(\.\d+)?/ <<
-    if (!parse_number(match_text, match_length, &$$))
-    {
-        $terminate(PARSER_TERMINATE_NUMBER_RANGE);
-    }
->>
-
-start Scene;
-
-Background -> background Vector;
-
-Color -> color Vector;
-
-Height -> height uint;
-
-Number -> uint;
-Number -> number;
-
-Options -> options lcurly OptionsItems rcurly;
-
-OptionsItems -> ;
-OptionsItems -> OptionsItem OptionsItems;
-
-OptionsItem -> Background;
-OptionsItem -> Height;
-OptionsItem -> Width;
-
-Position -> position Vector;
-
-Rotate -> rotate Number comma Vector;
-Rotate -> rotate Number comma Vector lcurly SceneItems rcurly;
-
-Scale -> scale Number;
-Scale -> scale Number lcurly SceneItems rcurly;
-Scale -> scale Vector;
-Scale -> scale Vector lcurly SceneItems rcurly;
-
-SceneItemBlock -> SceneItemName lcurly SceneItems rcurly;
-
-Scene -> Options? SceneItems;
-
-SceneItems -> ;
-SceneItems -> SceneItem SceneItems;
-
-SceneItem -> Color;
-SceneItem -> Position;
-SceneItem -> Rotate;
-SceneItem -> Scale;
-SceneItem -> SceneItemBlock;
-SceneItem -> Size;
-SceneItem -> Target;
-SceneItem -> Translate;
-SceneItem -> Up;
-
-SceneItemName -> box;
-SceneItemName -> camera;
-SceneItemName -> cyl;
-SceneItemName -> material;
-SceneItemName -> plane;
-SceneItemName -> sphere;
-
-Size -> size Number;
-Size -> size Vector;
-
-Target -> target Vector;
-
-Translate -> translate Vector;
-Translate -> translate Vector lcurly SceneItems rcurly;
-
-Up -> up Vector;
-
-Vector -> lt Number comma Number comma Number gt;
-Vector -> lt Number comma Number comma Number comma Number gt;
-
-Width -> width uint;
@@ -1,226 +0,0 @@
-#include <fart/Cli.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <stdint.h>
-
-#define FLAGS \
-    FLAG(height, "h", true) \
-    FLAG(height_l, "height", true) \
-    FLAG(help, "help", false) \
-    FLAG(output, "o", true) \
-    FLAG(output_l, "output", true) \
-    FLAG(threads, "t", true) \
-    FLAG(threads_l, "threads", true) \
-    FLAG(version, "version", false) \
-    FLAG(width, "w", true) \
-    FLAG(width_l, "width", true) \
-
-#define FLAG(name, flag, arg) flag_##name,
-typedef enum
-{
-    FLAGS
-    flag__count
-} flag_id_t;
-#undef FLAG
-
-#define FLAG(name, flag, arg) static const char flag_##name##_str[] = flag;
-FLAGS
-#undef FLAG
-
-typedef struct
-{
-    const char * flag;
-    size_t flag_length;
-    bool arg;
-} flag_def_t;
-
-#define FLAG(name, flag, arg) { \
-    flag_##name##_str, \
-    sizeof(flag_##name##_str) - 1u, \
-    arg},
-static const flag_def_t flag_defs[] = {
-    FLAGS
-};
-#undef FLAG
-
-int Cli::run(int argc, char * argv[])
-{
-    for (size_t i = 1; i < argc; i++)
-    {
-        size_t dashes = 0u;
-        if (strncmp(argv[i], "--", 2) == 0)
-        {
-            dashes = 2u;
-        }
-        else if (strncmp(argv[i], "-", 1) == 0)
-        {
-            dashes = 1u;
-        }
-        if (dashes > 0u)
-        {
-            const char * flag = &argv[i][dashes];
-            size_t flag_idx;
-            for (flag_idx = 0u; flag_idx < flag__count; flag_idx++)
-            {
-                size_t flag_length = flag_defs[flag_idx].flag_length;
-                size_t flag_dashes = flag_length == 1u ? 1u : 2u;
-                if (flag_dashes != dashes)
-                {
-                    continue;
-                }
-                if (strncmp(flag, flag_defs[flag_idx].flag, flag_length) != 0)
-                {
-                    continue;
-                }
-                if (dashes == 2 && flag[flag_length] != '\0' && flag[flag_length] != '=')
-                {
-                    continue;
-                }
-                bool arg = flag_defs[flag_idx].arg;
-                const char * arg_value = nullptr;
-                if (arg)
-                {
-                    if (flag[flag_length] == '\0')
-                    {
-                        if (i >= (argc - 1))
-                        {
-                            fprintf(stderr, "Error: option %s requires an argument\n", flag_defs[flag_idx].flag);
-                            return 2;
-                        }
-                        i++;
-                        arg_value = argv[i];
-                    }
-                    else if (dashes == 1u)
-                    {
-                        arg_value = &flag[flag_length];
-                    }
-                    else if (flag[flag_length + 1] != '\0')
-                    {
-                        arg_value = &flag[flag_length + 1];
-                    }
-                    else
-                    {
-                        fprintf(stderr, "Error: option %s requires an argument\n", flag_defs[flag_idx].flag);
-                        return 2;
-                    }
-                }
-                else if (dashes == 2u && flag[flag_length] == '=')
-                {
-                    fprintf(stderr, "Error: option %s does not take an argument\n", flag_defs[flag_idx].flag);
-                    return 2;
-                }
-                else
-                {
-                    /* TODO: support combining short flags, e.g. -cofoo */
-                }
-                int r = handle_option(flag_idx, arg_value);
-                if (r != 0)
-                {
-                    return r;
-                }
-                break;
-            }
-            if (flag_idx == flag__count)
-            {
-                fprintf(stderr, "Unknown flag: %s\n", flag);
-                return 2;
-            }
-        }
-        else
-        {
-            if (!this->input_file.empty())
-            {
-                fprintf(stderr, "Extraneous argument: %s\n", argv[i]);
-                return 2;
-            }
-            this->input_file = argv[i];
-        }
-    }
-    return 0;
-}
-
-static bool parse_size(const char * flag, const char * value, opt<size_t> * out)
-{
-    bool valid = value[0] != '\0';
-    for (const char * c = value; *c != '\0'; c++)
-    {
-        if (*c < '0' || *c > '9')
-        {
-            valid = false;
-            break;
-        }
-    }
-    if (valid)
-    {
-        errno = 0;
-        unsigned long long v = strtoull(value, nullptr, 10);
-        if (errno == 0 && v <= SIZE_MAX)
-        {
-            *out = (size_t)v;
-            return true;
-        }
-    }
-    fprintf(stderr, "Error: invalid value for option %s: '%s'\n", flag, value);
-    return false;
-}
-
-int Cli::handle_option(size_t flag_idx, const char * arg_value)
-{
-    switch (flag_idx)
-    {
-    case flag_height:
-    case flag_height_l:
-        if (!parse_size(flag_defs[flag_idx].flag, arg_value, &this->options.height))
-        {
-            return 2;
-        }
-        return 0;
-
-    case flag_help:
-        printf("Usage: fart [options] input-file\n");
-        printf("\n");
-        printf("  Options:\n");
-        printf("\n");
-        printf("  -h, --height H        Set render height to H\n");
-        printf("  --help                Show this help and exit\n");
-        printf("  -o, --output F        Write rendered image to file F\n");
-        printf("  -t, --threads N       Use N render threads (default: number of CPUs)\n");
-        printf("  -w, --width W         Set render width to W\n");
-        printf("  --version             Show fart version and exit\n");
-        return 1;
-
-    case flag_output:
-    case flag_output_l:
-        this->output_file = arg_value;
-        return 0;
-
-    case flag_threads:
-    case flag_threads_l:
-        if (!parse_size(flag_defs[flag_idx].flag, arg_value, &this->options.threads))
-        {
-            return 2;
-        }
-        if (*this->options.threads == 0u)
-        {
-            fprintf(stderr, "Error: option %s must be at least 1\n", flag_defs[flag_idx].flag);
-            return 2;
-        }
-        return 0;
-
-    case flag_width:
-    case flag_width_l:
-        if (!parse_size(flag_defs[flag_idx].flag, arg_value, &this->options.width))
-        {
-            return 2;
-        }
-        return 0;
-
-    case flag_version:
-        printf("fart, version 0.0.0.0.0.1\n");
-        return 1;
-    }
-    fprintf(stderr, "Internal error: unhandled flag_idx=%zu\n", flag_idx);
-    return 2;
-}
@@ -1,16 +0,0 @@
-#pragma once
-
-#include <fart/Options.h>
-
-class Cli
-{
-public:
-    Options options;
-    string_view input_file;
-    opt<string_view> output_file;
-
-    int run(int argc, char * argv[]);
-
-private:
-    int handle_option(size_t option_idx, const char * arg_value);
-};
@@ -1,14 +0,0 @@
-#pragma once
-
-struct Color
-{
-    double r;
-    double g;
-    double b;
-    double a;
-
-    Color(double r = 0.0, double g = 0.0, double b = 0.0, double a = 1.0)
-        : r(r), g(g), b(b), a(a)
-    {
-    }
-};
@@ -1,84 +0,0 @@
-#include <fart/Engine.h>
-#include <fart/Parser.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-
-Engine::Engine(const Options & options)
-    : options(options)
-{
-}
-
-Engine::~Engine()
-{
-    delete scene;
-}
-
-int Engine::run(string_view input_file, opt<string_view> output_file)
-{
-    string output_path;
-    if (output_file)
-    {
-        output_path = *output_file;
-    }
-    else
-    {
-        string_view base = input_file;
-        if (base.ends_with(".fart"))
-        {
-            base.remove_suffix(5u);
-        }
-        output_path = string(base) + ".png";
-    }
-
-    image_writer.reset(ImageWriter::build(output_path));
-    if (!image_writer)
-    {
-        return 1;
-    }
-
-    /* Verify the output file can be written before rendering. */
-    FILE * fh = fopen(output_path.c_str(), "wb");
-    if (fh == nullptr)
-    {
-        fprintf(stderr, "Error opening output file '%s': %s\n", output_path.c_str(), strerror(errno));
-        return 1;
-    }
-    if (fclose(fh) != 0)
-    {
-        fprintf(stderr, "Error closing output file '%s': %s\n", output_path.c_str(), strerror(errno));
-        return 1;
-    }
-    if (remove(output_path.c_str()) != 0)
-    {
-        fprintf(stderr, "Error removing output file '%s': %s\n", output_path.c_str(), strerror(errno));
-        return 1;
-    }
-
-    delete scene;
-    scene = Parser::load_scene(input_file);
-    if (!scene)
-    {
-        return 1;
-    }
-
-    /* CLI options take precedence over scene options; defaults fill the rest. */
-    options.merge(scene->options);
-    options.apply_defaults();
-
-    Image image(*options.width, *options.height);
-    for (size_t y = 0u; y < *options.height; y++)
-    {
-        for (size_t x = 0u; x < *options.width; x++)
-        {
-            image[x, y] = *options.background;
-        }
-    }
-
-    if (!image_writer->write(image))
-    {
-        return 1;
-    }
-
-    return 0;
-}
@@ -1,19 +0,0 @@
-#pragma once
-
-#include <fart/ImageWriter.h>
-#include <fart/Options.h>
-#include <fart/Scene.h>
-#include <memory>
-
-class Engine
-{
-public:
-    Engine(const Options & options);
-    ~Engine();
-    int run(string_view input_file, opt<string_view> output_file);
-
-protected:
-    Options options;
-    std::unique_ptr<ImageWriter> image_writer;
-    Scene * scene = nullptr;
-};
@@ -1,6 +0,0 @@
-#include <fart/Image.h>
-
-Image::Image(size_t width, size_t height)
-    : width(width), height(height), pixels(width * height)
-{
-}
@@ -1,17 +0,0 @@
-#pragma once
-
-#include <fart/Color.h>
-#include <stddef.h>
-
-struct Image
-{
-    size_t width;
-    size_t height;
-    vector<Color> pixels;
-    Image(size_t width, size_t height);
-
-    Color & operator[](size_t x, size_t y)
-    {
-        return this->pixels[this->width * y + x];
-    }
-};
@@ -1,15 +0,0 @@
-#include <fart/ImageWriter.h>
-#include <fart/PngImageWriter.h>
-#include <stdio.h>
-#include <filesystem>
-
-ImageWriter * ImageWriter::build(const string & fname)
-{
-    string ext = std::filesystem::path(fname).extension().string();
-    if (ext == ".png")
-    {
-        return new PngImageWriter(fname);
-    }
-    fprintf(stderr, "Unsupported output image format: '%s'\n", fname.c_str());
-    return nullptr;
-}
@@ -1,16 +0,0 @@
-#pragma once
-
-#include <string>
-#include <fart/Image.h>
-
-class ImageWriter
-{
-public:
-    static ImageWriter * build(const string & fname);
-    virtual ~ImageWriter() = default;
-    virtual bool write(const Image & image) = 0;
-
-protected:
-    ImageWriter(const string & fname) : fname(fname) {}
-    string fname;
-};
@@ -1,44 +0,0 @@
-#include <fart/Options.h>
-#include <thread>
-
-void Options::merge(const Options & other)
-{
-    if (!width)
-    {
-        width = other.width;
-    }
-    if (!height)
-    {
-        height = other.height;
-    }
-    if (!threads)
-    {
-        threads = other.threads;
-    }
-    if (!background)
-    {
-        background = other.background;
-    }
-}
-
-void Options::apply_defaults()
-{
-    if (!width)
-    {
-        width = 800u;
-    }
-    if (!height)
-    {
-        height = 600u;
-    }
-    if (!threads)
-    {
-        /* hardware_concurrency() may return 0 if it cannot be determined. */
-        size_t n = std::thread::hardware_concurrency();
-        threads = n > 0u ? n : 1u;
-    }
-    if (!background)
-    {
-        background = Color{0.0, 0.0, 0.0, 1.0};
-    }
-}
@@ -1,18 +0,0 @@
-#pragma once
-
-#include <fart/Color.h>
-#include <stddef.h>
-
-struct Options
-{
-    opt<size_t> width;
-    opt<size_t> height;
-    opt<size_t> threads;
-    opt<Color> background;
-
-    /* Set each field that is not already set to the value from other. */
-    void merge(const Options & other);
-
-    /* Fill in any unset fields with default values. */
-    void apply_defaults();
-};
@@ -1,147 +0,0 @@
-#include <fart/Parser.h>
-#include <fart/propane.h>
-#include <fart/read_file.h>
-#include <stdint.h>
-#include <stdio.h>
-
-Scene * Parser::load_scene(const string_view & input_file)
-{
-    opt<vector<uint8_t>> input = read_file(input_file);
-    if (!input)
-    {
-        return nullptr;
-    }
-
-    p_context_t * context = p_context_new(input->data(), input->size());
-    size_t result = p_parse(context);
-    p_position_t pos = p_position(context);
-    int fname_len = (int)input_file.size();
-    const char * fname = input_file.data();
-    bool success = false;
-    switch (result)
-    {
-    case P_SUCCESS:
-        success = true;
-        break;
-
-    case P_DECODE_ERROR:
-        fprintf(stderr, "%.*s:%u:%u: error: invalid UTF-8 encoding\n",
-            fname_len, fname, pos.row, pos.col);
-        break;
-
-    case P_UNEXPECTED_INPUT:
-        fprintf(stderr, "%.*s:%u:%u: error: unexpected input\n",
-            fname_len, fname, pos.row, pos.col);
-        break;
-
-    case P_UNEXPECTED_TOKEN:
-    {
-        p_token_t token = p_token(context);
-        if (token == TOKEN___EOF)
-        {
-            fprintf(stderr, "%.*s:%u:%u: error: unexpected end of input\n",
-                fname_len, fname, pos.row, pos.col);
-        }
-        else
-        {
-            fprintf(stderr, "%.*s:%u:%u: error: unexpected token '%s'\n",
-                fname_len, fname, pos.row, pos.col, p_token_names[token]);
-        }
-        break;
-    }
-
-    case P_USER_TERMINATED:
-        if (p_user_terminate_code(context) == PARSER_TERMINATE_NUMBER_RANGE)
-        {
-            fprintf(stderr, "%.*s:%u:%u: error: number out of range\n",
-                fname_len, fname, pos.row, pos.col);
-        }
-        else
-        {
-            fprintf(stderr, "%.*s:%u:%u: internal error: unknown terminate code %zu\n",
-                fname_len, fname, pos.row, pos.col, p_user_terminate_code(context));
-        }
-        break;
-
-    default:
-        fprintf(stderr, "%.*s:%u:%u: internal error: unknown parser result %zu\n",
-            fname_len, fname, pos.row, pos.col, result);
-        break;
-    }
-
-    if (!success)
-    {
-        p_context_delete(context);
-        return nullptr;
-    }
-
-    Scene * scene = build_scene(input_file, p_result(context));
-    p_context_delete(context);
-    return scene;
-}
-
-/* Convert a uint token value to a size_t, reporting an error if it does not
- * fit. */
-static bool token_to_size(const string_view & input_file, PToken token, opt<size_t> * out)
-{
-    /* SIZE_MAX + 1, computed so that it is exactly representable as a double. */
-    const double size_limit = (double)(SIZE_MAX / 2u + 1u) * 2.0;
-    double value = token.pvalue();
-    if (value >= size_limit)
-    {
-        p_position_t pos = token.position();
-        fprintf(stderr, "%.*s:%u:%u: error: value out of range\n",
-            (int)input_file.size(), input_file.data(), pos.row, pos.col);
-        return false;
-    }
-    *out = (size_t)value;
-    return true;
-}
-
-static Color vector_to_color(PVector vector)
-{
-    Color color{
-        vector.pNumber2().pToken().pvalue(),
-        vector.pNumber4().pToken().pvalue(),
-        vector.pNumber6().pToken().pvalue(),
-    };
-    if (PNumber a = vector.pNumber8(); p_node_valid(a))
-    {
-        color.a = a.pToken().pvalue();
-    }
-    return color;
-}
-
-Scene * Parser::build_scene(const string_view & input_file, PScene pscene)
-{
-    Scene * scene = new Scene();
-
-    /* If the options block is absent, pOptions() returns a null node and so
-     * does pOptionsItems() on it, so the loop body is skipped. */
-    for (POptionsItems items = pscene.pOptions().pOptionsItems();
-         p_node_valid(items);
-         items = items.pOptionsItems())
-    {
-        POptionsItem item = items.pOptionsItem();
-        bool ok = true;
-        if (PBackground background = item.pBackground(); p_node_valid(background))
-        {
-            scene->options.background = vector_to_color(background.pVector());
-        }
-        else if (PHeight height = item.pHeight(); p_node_valid(height))
-        {
-            ok = token_to_size(input_file, height.pToken2(), &scene->options.height);
-        }
-        else if (PWidth width = item.pWidth(); p_node_valid(width))
-        {
-            ok = token_to_size(input_file, width.pToken2(), &scene->options.width);
-        }
-        if (!ok)
-        {
-            delete scene;
-            return nullptr;
-        }
-    }
-
-    return scene;
-}
@@ -1,14 +0,0 @@
-#pragma once
-
-#include <fart/Scene.h>
-
-struct PScene;
-
-class Parser
-{
-public:
-    static Scene * load_scene(const string_view & input_file);
-
-private:
-    static Scene * build_scene(const string_view & input_file, PScene pscene);
-};
@@ -1,38 +0,0 @@
-#include <fart/PngImageWriter.h>
-#include <png.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <algorithm>
-#include <cmath>
-
-static uint8_t to_byte(double v)
-{
-    return (uint8_t)std::lround(std::clamp(v, 0.0, 1.0) * 255.0);
-}
-
-bool PngImageWriter::write(const Image & image)
-{
-    vector<uint8_t> buffer(image.width * image.height * 4u);
-    for (size_t i = 0u; i < image.pixels.size(); i++)
-    {
-        const Color & c = image.pixels[i];
-        buffer[i * 4u + 0u] = to_byte(c.r);
-        buffer[i * 4u + 1u] = to_byte(c.g);
-        buffer[i * 4u + 2u] = to_byte(c.b);
-        buffer[i * 4u + 3u] = to_byte(c.a);
-    }
-
-    png_image png = {};
-    png.version = PNG_IMAGE_VERSION;
-    png.width = image.width;
-    png.height = image.height;
-    png.format = PNG_FORMAT_RGBA;
-
-    if (!png_image_write_to_file(&png, fname.c_str(), 0, buffer.data(), 0, nullptr))
-    {
-        fprintf(stderr, "Error writing PNG file '%s': %s\n", fname.c_str(), png.message);
-        png_image_free(&png);
-        return false;
-    }
-    return true;
-}
@@ -1,10 +0,0 @@
-#pragma once
-
-#include <fart/ImageWriter.h>
-
-class PngImageWriter : public ImageWriter
-{
-public:
-    PngImageWriter(const string & fname) : ImageWriter(fname) {}
-    bool write(const Image & image) override;
-};
@@ -1,9 +0,0 @@
-#pragma once
-
-#include <fart/Options.h>
-
-class Scene
-{
-public:
-    Options options;
-};
@@ -1,11 +0,0 @@
-#pragma once
-
-#include <optional>
-#include <string>
-#include <string_view>
-#include <vector>
-
-using string = std::string;
-using string_view = std::string_view;
-template <typename T> using opt = std::optional<T>;
-template <typename T> using vector = std::vector<T>;
@@ -1,20 +0,0 @@
-#include <fart/Cli.h>
-#include <fart/Engine.h>
-#include <stdio.h>
-
-int main(int argc, char * argv[])
-{
-    Cli cli;
-    int rc = cli.run(argc, argv);
-    if (rc > 0)
-    {
-        return rc - 1;
-    }
-    if (cli.input_file.empty())
-    {
-        fprintf(stderr, "Error: no input file specified\n");
-        return 1;
-    }
-    Engine engine(cli.options);
-    return engine.run(cli.input_file, cli.output_file);
-}
@@ -1,32 +0,0 @@
-#include <fart/read_file.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-
-opt<vector<uint8_t>> read_file(string_view fname)
-{
-    string path(fname);
-    FILE * fh = fopen(path.c_str(), "rb");
-    if (fh == nullptr)
-    {
-        fprintf(stderr, "Error opening input file '%s': %s\n", path.c_str(), strerror(errno));
-        return std::nullopt;
-    }
-
-    vector<uint8_t> buffer;
-    uint8_t chunk[4096];
-    size_t n;
-    while ((n = fread(chunk, 1u, sizeof(chunk), fh)) > 0u)
-    {
-        buffer.insert(buffer.end(), chunk, chunk + n);
-    }
-    if (ferror(fh))
-    {
-        fprintf(stderr, "Error reading input file '%s': %s\n", path.c_str(), strerror(errno));
-        fclose(fh);
-        return std::nullopt;
-    }
-    fclose(fh);
-
-    return buffer;
-}
@@ -1,5 +0,0 @@
-#pragma once
-
-#include <stdint.h>
-
-opt<vector<uint8_t>> read_file(string_view fname);
@@ -0,0 +1,16 @@
+mod cli;
+
+use crate::cli::Cli;
+use std::process::ExitCode;
+
+fn main() -> ExitCode {
+    match run() {
+        Some(_) => ExitCode::SUCCESS,
+        None => ExitCode::FAILURE,
+    }
+}
+
+fn run() -> Option<()> {
+    let mut cli = Cli::new();
+    cli.run()
+}
Author	SHA1	Message	Date
josh	64c5abd9b9	Start parsing command line arguments	2026-08-29 12:48:47 -04:00
josh	d9dc0b7176	Add Cli struct	2026-08-21 23:15:42 -04:00
josh	a567084398	Create cargo binary crate	2026-08-20 16:21:00 -04:00
josh	789061b71f	Remove old files	2026-08-20 16:16:46 -04:00