Initial commit
This commit is contained in:
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|
|
@ -0,0 +1,390 @@
|
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## Ignore Visual Studio temporary files, build results, and
|
||||
## files generated by popular Visual Studio add-ons.
|
||||
##
|
||||
## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
|
||||
|
||||
# User-specific files
|
||||
*.rsuser
|
||||
*.suo
|
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*.user
|
||||
*.userosscache
|
||||
*.sln.docstates
|
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|
||||
# User-specific files (MonoDevelop/Xamarin Studio)
|
||||
*.userprefs
|
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# Mono auto generated files
|
||||
mono_crash.*
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|
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# Build results
|
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#[Dd]ebug/
|
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[Dd]ebugPublic/
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[Rr]elease/
|
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[Rr]eleases/
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[Aa][Rr][Mm]/
|
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|
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bld/
|
||||
[Bb]in/
|
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[Oo]bj/
|
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[Oo]ut/
|
||||
[Ll]og/
|
||||
[Ll]ogs/
|
||||
|
||||
# Visual Studio 2015/2017 cache/options directory
|
||||
.vs/
|
||||
# Uncomment if you have tasks that create the project's static files in wwwroot
|
||||
#wwwroot/
|
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|
||||
# Visual Studio 2017 auto generated files
|
||||
Generated\ Files/
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|
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# MSTest test Results
|
||||
[Tt]est[Rr]esult*/
|
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[Bb]uild[Ll]og.*
|
||||
|
||||
# NUnit
|
||||
*.VisualState.xml
|
||||
TestResult.xml
|
||||
nunit-*.xml
|
||||
|
||||
# Build Results of an ATL Project
|
||||
[Dd]ebugPS/
|
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[Rr]eleasePS/
|
||||
dlldata.c
|
||||
|
||||
# Benchmark Results
|
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BenchmarkDotNet.Artifacts/
|
||||
|
||||
# .NET Core
|
||||
project.lock.json
|
||||
project.fragment.lock.json
|
||||
artifacts/
|
||||
|
||||
# ASP.NET Scaffolding
|
||||
ScaffoldingReadMe.txt
|
||||
|
||||
# StyleCop
|
||||
StyleCopReport.xml
|
||||
|
||||
# Files built by Visual Studio
|
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*_i.c
|
||||
*_p.c
|
||||
*_h.h
|
||||
*.ilk
|
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*.meta
|
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*.obj
|
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*.iobj
|
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*.pch
|
||||
*.pdb
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*.ipdb
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||||
*.pgc
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*.pgd
|
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*.rsp
|
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*.sbr
|
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*.tlb
|
||||
*.tli
|
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*.tlh
|
||||
*.tmp
|
||||
*.tmp_proj
|
||||
*_wpftmp.csproj
|
||||
*.log
|
||||
*.vspscc
|
||||
*.vssscc
|
||||
.builds
|
||||
*.pidb
|
||||
*.svclog
|
||||
*.scc
|
||||
|
||||
# Chutzpah Test files
|
||||
_Chutzpah*
|
||||
|
||||
# Visual C++ cache files
|
||||
ipch/
|
||||
*.aps
|
||||
*.ncb
|
||||
*.opendb
|
||||
*.opensdf
|
||||
*.sdf
|
||||
*.cachefile
|
||||
*.VC.db
|
||||
*.VC.VC.opendb
|
||||
|
||||
# Visual Studio profiler
|
||||
*.psess
|
||||
*.vsp
|
||||
*.vspx
|
||||
*.sap
|
||||
|
||||
# Visual Studio Trace Files
|
||||
*.e2e
|
||||
|
||||
# TFS 2012 Local Workspace
|
||||
$tf/
|
||||
|
||||
# Guidance Automation Toolkit
|
||||
*.gpState
|
||||
|
||||
# ReSharper is a .NET coding add-in
|
||||
_ReSharper*/
|
||||
*.[Rr]e[Ss]harper
|
||||
*.DotSettings.user
|
||||
|
||||
# TeamCity is a build add-in
|
||||
_TeamCity*
|
||||
|
||||
# DotCover is a Code Coverage Tool
|
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*.dotCover
|
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|
||||
# AxoCover is a Code Coverage Tool
|
||||
.axoCover/*
|
||||
!.axoCover/settings.json
|
||||
|
||||
# Coverlet is a free, cross platform Code Coverage Tool
|
||||
coverage*.json
|
||||
coverage*.xml
|
||||
coverage*.info
|
||||
|
||||
# Visual Studio code coverage results
|
||||
*.coverage
|
||||
*.coveragexml
|
||||
|
||||
# NCrunch
|
||||
_NCrunch_*
|
||||
.*crunch*.local.xml
|
||||
nCrunchTemp_*
|
||||
|
||||
# MightyMoose
|
||||
*.mm.*
|
||||
AutoTest.Net/
|
||||
|
||||
# Web workbench (sass)
|
||||
.sass-cache/
|
||||
|
||||
# Installshield output folder
|
||||
[Ee]xpress/
|
||||
|
||||
# DocProject is a documentation generator add-in
|
||||
DocProject/buildhelp/
|
||||
DocProject/Help/*.HxT
|
||||
DocProject/Help/*.HxC
|
||||
DocProject/Help/*.hhc
|
||||
DocProject/Help/*.hhk
|
||||
DocProject/Help/*.hhp
|
||||
DocProject/Help/Html2
|
||||
DocProject/Help/html
|
||||
|
||||
# Click-Once directory
|
||||
publish/
|
||||
|
||||
# Publish Web Output
|
||||
*.[Pp]ublish.xml
|
||||
*.azurePubxml
|
||||
# Note: Comment the next line if you want to checkin your web deploy settings,
|
||||
# but database connection strings (with potential passwords) will be unencrypted
|
||||
*.pubxml
|
||||
*.publishproj
|
||||
|
||||
# Microsoft Azure Web App publish settings. Comment the next line if you want to
|
||||
# checkin your Azure Web App publish settings, but sensitive information contained
|
||||
# in these scripts will be unencrypted
|
||||
PublishScripts/
|
||||
|
||||
# NuGet Packages
|
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*.nupkg
|
||||
# NuGet Symbol Packages
|
||||
*.snupkg
|
||||
# The packages folder can be ignored because of Package Restore
|
||||
**/[Pp]ackages/*
|
||||
# except build/, which is used as an MSBuild target.
|
||||
!**/[Pp]ackages/build/
|
||||
# Uncomment if necessary however generally it will be regenerated when needed
|
||||
#!**/[Pp]ackages/repositories.config
|
||||
# NuGet v3's project.json files produces more ignorable files
|
||||
*.nuget.props
|
||||
*.nuget.targets
|
||||
|
||||
# Microsoft Azure Build Output
|
||||
csx/
|
||||
*.build.csdef
|
||||
|
||||
# Microsoft Azure Emulator
|
||||
ecf/
|
||||
rcf/
|
||||
|
||||
# Windows Store app package directories and files
|
||||
AppPackages/
|
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BundleArtifacts/
|
||||
Package.StoreAssociation.xml
|
||||
_pkginfo.txt
|
||||
*.appx
|
||||
*.appxbundle
|
||||
*.appxupload
|
||||
|
||||
# Visual Studio cache files
|
||||
# files ending in .cache can be ignored
|
||||
*.[Cc]ache
|
||||
# but keep track of directories ending in .cache
|
||||
!?*.[Cc]ache/
|
||||
|
||||
# Others
|
||||
ClientBin/
|
||||
~$*
|
||||
*~
|
||||
*.dbmdl
|
||||
*.dbproj.schemaview
|
||||
*.jfm
|
||||
*.pfx
|
||||
*.publishsettings
|
||||
orleans.codegen.cs
|
||||
|
||||
# Including strong name files can present a security risk
|
||||
# (https://github.com/github/gitignore/pull/2483#issue-259490424)
|
||||
#*.snk
|
||||
|
||||
# Since there are multiple workflows, uncomment next line to ignore bower_components
|
||||
# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
|
||||
#bower_components/
|
||||
|
||||
# RIA/Silverlight projects
|
||||
Generated_Code/
|
||||
|
||||
# Backup & report files from converting an old project file
|
||||
# to a newer Visual Studio version. Backup files are not needed,
|
||||
# because we have git ;-)
|
||||
_UpgradeReport_Files/
|
||||
Backup*/
|
||||
UpgradeLog*.XML
|
||||
UpgradeLog*.htm
|
||||
ServiceFabricBackup/
|
||||
*.rptproj.bak
|
||||
|
||||
# SQL Server files
|
||||
*.mdf
|
||||
*.ldf
|
||||
*.ndf
|
||||
|
||||
# Business Intelligence projects
|
||||
*.rdl.data
|
||||
*.bim.layout
|
||||
*.bim_*.settings
|
||||
*.rptproj.rsuser
|
||||
*- [Bb]ackup.rdl
|
||||
*- [Bb]ackup ([0-9]).rdl
|
||||
*- [Bb]ackup ([0-9][0-9]).rdl
|
||||
|
||||
# Microsoft Fakes
|
||||
FakesAssemblies/
|
||||
|
||||
# GhostDoc plugin setting file
|
||||
*.GhostDoc.xml
|
||||
|
||||
# Node.js Tools for Visual Studio
|
||||
.ntvs_analysis.dat
|
||||
node_modules/
|
||||
|
||||
# Visual Studio 6 build log
|
||||
*.plg
|
||||
|
||||
# Visual Studio 6 workspace options file
|
||||
*.opt
|
||||
|
||||
# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
|
||||
*.vbw
|
||||
|
||||
# Visual Studio LightSwitch build output
|
||||
**/*.HTMLClient/GeneratedArtifacts
|
||||
**/*.DesktopClient/GeneratedArtifacts
|
||||
**/*.DesktopClient/ModelManifest.xml
|
||||
**/*.Server/GeneratedArtifacts
|
||||
**/*.Server/ModelManifest.xml
|
||||
_Pvt_Extensions
|
||||
|
||||
# Paket dependency manager
|
||||
.paket/paket.exe
|
||||
paket-files/
|
||||
|
||||
# FAKE - F# Make
|
||||
.fake/
|
||||
|
||||
# CodeRush personal settings
|
||||
.cr/personal
|
||||
|
||||
# Python Tools for Visual Studio (PTVS)
|
||||
__pycache__/
|
||||
*.pyc
|
||||
|
||||
# Cake - Uncomment if you are using it
|
||||
# tools/**
|
||||
# !tools/packages.config
|
||||
|
||||
# Tabs Studio
|
||||
*.tss
|
||||
|
||||
# Telerik's JustMock configuration file
|
||||
*.jmconfig
|
||||
|
||||
# BizTalk build output
|
||||
*.btp.cs
|
||||
*.btm.cs
|
||||
*.odx.cs
|
||||
*.xsd.cs
|
||||
|
||||
# OpenCover UI analysis results
|
||||
OpenCover/
|
||||
|
||||
# Azure Stream Analytics local run output
|
||||
ASALocalRun/
|
||||
|
||||
# MSBuild Binary and Structured Log
|
||||
*.binlog
|
||||
|
||||
# NVidia Nsight GPU debugger configuration file
|
||||
*.nvuser
|
||||
|
||||
# MFractors (Xamarin productivity tool) working folder
|
||||
.mfractor/
|
||||
|
||||
# Local History for Visual Studio
|
||||
.localhistory/
|
||||
|
||||
# BeatPulse healthcheck temp database
|
||||
healthchecksdb
|
||||
|
||||
# Backup folder for Package Reference Convert tool in Visual Studio 2017
|
||||
MigrationBackup/
|
||||
|
||||
# Ionide (cross platform F# VS Code tools) working folder
|
||||
.ionide/
|
||||
|
||||
# Fody - auto-generated XML schema
|
||||
FodyWeavers.xsd
|
||||
|
||||
intermediate-files/
|
||||
|
||||
.cache/
|
||||
.vscode/
|
||||
*.json
|
||||
*.make
|
||||
Makefile
|
||||
*.sublime-*
|
||||
|
||||
*.vcxproj
|
||||
|
||||
*.sln
|
||||
|
||||
*.vcxproj.filters
|
||||
|
||||
*.code-workspace
|
||||
|
||||
*.o
|
||||
|
||||
*.d
|
||||
|
||||
*.ninja*
|
||||
|
||||
.idea/
|
||||
|
||||
cmake*/
|
||||
|
|
@ -0,0 +1,30 @@
|
|||
cmake_minimum_required(VERSION 4.1)
|
||||
project(basic-vcs)
|
||||
|
||||
include(FetchContent)
|
||||
FetchContent_Declare(ZStrGitRepo
|
||||
GIT_REPOSITORY "https://github.com/mateidavid/zstr" # can also be a local filesystem path!
|
||||
GIT_TAG "master"
|
||||
)
|
||||
FetchContent_MakeAvailable(ZStrGitRepo) # defines INTERFACE target 'zstr::zstr'
|
||||
|
||||
set(CMAKE_CXX_STANDARD 23)
|
||||
|
||||
add_executable(basic-vcs src/main.cpp
|
||||
include/sha1.hpp
|
||||
include/init.h
|
||||
include/cat-file.h
|
||||
include/commands.h
|
||||
include/ls-tree.h
|
||||
include/write-tree.h
|
||||
src/commands/cat-file.cpp
|
||||
src/commands/init.cpp
|
||||
src/commands/ls-tree.cpp
|
||||
src/commands/write-tree.cpp
|
||||
src/commands/hash-object.cpp
|
||||
include/hash-object.h
|
||||
src/commands/clone.cpp
|
||||
include/clone.h)
|
||||
|
||||
target_link_libraries(basic-vcs zstr::zstr)
|
||||
target_include_directories(basic-vcs PRIVATE include)
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
#pragma once
|
||||
|
||||
int catFile(const int argc, const char** argv);
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
#pragma once
|
||||
|
||||
int clone(const int argc, const char** argv);
|
||||
|
|
@ -0,0 +1,8 @@
|
|||
#pragma once
|
||||
|
||||
#include "cat-file.h"
|
||||
#include "clone.h"
|
||||
#include "hash-object.h"
|
||||
#include "init.h"
|
||||
#include "ls-tree.h"
|
||||
#include "write-tree.h"
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
#pragma once
|
||||
|
||||
int hashObject(const int argc, const char** argv);
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
#pragma once
|
||||
|
||||
int init();
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
#pragma once
|
||||
|
||||
int lsTree(const int argc, const char** argv);
|
||||
|
|
@ -0,0 +1,334 @@
|
|||
/*
|
||||
sha1.hpp - source code of
|
||||
|
||||
============
|
||||
SHA-1 in C++
|
||||
============
|
||||
|
||||
100% Public Domain.
|
||||
|
||||
Original C Code
|
||||
-- Steve Reid <steve@edmweb.com>
|
||||
Small changes to fit into bglibs
|
||||
-- Bruce Guenter <bruce@untroubled.org>
|
||||
Translation to simpler C++ Code
|
||||
-- Volker Diels-Grabsch <v@njh.eu>
|
||||
Safety fixes
|
||||
-- Eugene Hopkinson <slowriot at voxelstorm dot com>
|
||||
Header-only library
|
||||
-- Zlatko Michailov <zlatko@michailov.org>
|
||||
*/
|
||||
|
||||
#ifndef SHA1_HPP
|
||||
#define SHA1_HPP
|
||||
|
||||
|
||||
#include <cstdint>
|
||||
#include <fstream>
|
||||
#include <iomanip>
|
||||
#include <iostream>
|
||||
#include <sstream>
|
||||
#include <string>
|
||||
|
||||
|
||||
class SHA1
|
||||
{
|
||||
public:
|
||||
SHA1();
|
||||
void update(const std::string &s);
|
||||
void update(std::istream &is);
|
||||
std::string final();
|
||||
static std::string from_file(const std::string &filename);
|
||||
|
||||
private:
|
||||
uint32_t digest[5];
|
||||
std::string buffer;
|
||||
uint64_t transforms;
|
||||
};
|
||||
|
||||
|
||||
static const size_t BLOCK_INTS = 16; /* number of 32bit integers per SHA1 block */
|
||||
static const size_t BLOCK_BYTES = BLOCK_INTS * 4;
|
||||
|
||||
|
||||
inline static void reset(uint32_t digest[], std::string &buffer, uint64_t &transforms)
|
||||
{
|
||||
/* SHA1 initialization constants */
|
||||
digest[0] = 0x67452301;
|
||||
digest[1] = 0xefcdab89;
|
||||
digest[2] = 0x98badcfe;
|
||||
digest[3] = 0x10325476;
|
||||
digest[4] = 0xc3d2e1f0;
|
||||
|
||||
/* Reset counters */
|
||||
buffer = "";
|
||||
transforms = 0;
|
||||
}
|
||||
|
||||
|
||||
inline static uint32_t rol(const uint32_t value, const size_t bits)
|
||||
{
|
||||
return (value << bits) | (value >> (32 - bits));
|
||||
}
|
||||
|
||||
|
||||
inline static uint32_t blk(const uint32_t block[BLOCK_INTS], const size_t i)
|
||||
{
|
||||
return rol(block[(i+13)&15] ^ block[(i+8)&15] ^ block[(i+2)&15] ^ block[i], 1);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* (R0+R1), R2, R3, R4 are the different operations used in SHA1
|
||||
*/
|
||||
|
||||
inline static void R0(const uint32_t block[BLOCK_INTS], const uint32_t v, uint32_t &w, const uint32_t x, const uint32_t y, uint32_t &z, const size_t i)
|
||||
{
|
||||
z += ((w&(x^y))^y) + block[i] + 0x5a827999 + rol(v, 5);
|
||||
w = rol(w, 30);
|
||||
}
|
||||
|
||||
|
||||
inline static void R1(uint32_t block[BLOCK_INTS], const uint32_t v, uint32_t &w, const uint32_t x, const uint32_t y, uint32_t &z, const size_t i)
|
||||
{
|
||||
block[i] = blk(block, i);
|
||||
z += ((w&(x^y))^y) + block[i] + 0x5a827999 + rol(v, 5);
|
||||
w = rol(w, 30);
|
||||
}
|
||||
|
||||
|
||||
inline static void R2(uint32_t block[BLOCK_INTS], const uint32_t v, uint32_t &w, const uint32_t x, const uint32_t y, uint32_t &z, const size_t i)
|
||||
{
|
||||
block[i] = blk(block, i);
|
||||
z += (w^x^y) + block[i] + 0x6ed9eba1 + rol(v, 5);
|
||||
w = rol(w, 30);
|
||||
}
|
||||
|
||||
|
||||
inline static void R3(uint32_t block[BLOCK_INTS], const uint32_t v, uint32_t &w, const uint32_t x, const uint32_t y, uint32_t &z, const size_t i)
|
||||
{
|
||||
block[i] = blk(block, i);
|
||||
z += (((w|x)&y)|(w&x)) + block[i] + 0x8f1bbcdc + rol(v, 5);
|
||||
w = rol(w, 30);
|
||||
}
|
||||
|
||||
|
||||
inline static void R4(uint32_t block[BLOCK_INTS], const uint32_t v, uint32_t &w, const uint32_t x, const uint32_t y, uint32_t &z, const size_t i)
|
||||
{
|
||||
block[i] = blk(block, i);
|
||||
z += (w^x^y) + block[i] + 0xca62c1d6 + rol(v, 5);
|
||||
w = rol(w, 30);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Hash a single 512-bit block. This is the core of the algorithm.
|
||||
*/
|
||||
|
||||
inline static void transform(uint32_t digest[], uint32_t block[BLOCK_INTS], uint64_t &transforms)
|
||||
{
|
||||
/* Copy digest[] to working vars */
|
||||
uint32_t a = digest[0];
|
||||
uint32_t b = digest[1];
|
||||
uint32_t c = digest[2];
|
||||
uint32_t d = digest[3];
|
||||
uint32_t e = digest[4];
|
||||
|
||||
/* 4 rounds of 20 operations each. Loop unrolled. */
|
||||
R0(block, a, b, c, d, e, 0);
|
||||
R0(block, e, a, b, c, d, 1);
|
||||
R0(block, d, e, a, b, c, 2);
|
||||
R0(block, c, d, e, a, b, 3);
|
||||
R0(block, b, c, d, e, a, 4);
|
||||
R0(block, a, b, c, d, e, 5);
|
||||
R0(block, e, a, b, c, d, 6);
|
||||
R0(block, d, e, a, b, c, 7);
|
||||
R0(block, c, d, e, a, b, 8);
|
||||
R0(block, b, c, d, e, a, 9);
|
||||
R0(block, a, b, c, d, e, 10);
|
||||
R0(block, e, a, b, c, d, 11);
|
||||
R0(block, d, e, a, b, c, 12);
|
||||
R0(block, c, d, e, a, b, 13);
|
||||
R0(block, b, c, d, e, a, 14);
|
||||
R0(block, a, b, c, d, e, 15);
|
||||
R1(block, e, a, b, c, d, 0);
|
||||
R1(block, d, e, a, b, c, 1);
|
||||
R1(block, c, d, e, a, b, 2);
|
||||
R1(block, b, c, d, e, a, 3);
|
||||
R2(block, a, b, c, d, e, 4);
|
||||
R2(block, e, a, b, c, d, 5);
|
||||
R2(block, d, e, a, b, c, 6);
|
||||
R2(block, c, d, e, a, b, 7);
|
||||
R2(block, b, c, d, e, a, 8);
|
||||
R2(block, a, b, c, d, e, 9);
|
||||
R2(block, e, a, b, c, d, 10);
|
||||
R2(block, d, e, a, b, c, 11);
|
||||
R2(block, c, d, e, a, b, 12);
|
||||
R2(block, b, c, d, e, a, 13);
|
||||
R2(block, a, b, c, d, e, 14);
|
||||
R2(block, e, a, b, c, d, 15);
|
||||
R2(block, d, e, a, b, c, 0);
|
||||
R2(block, c, d, e, a, b, 1);
|
||||
R2(block, b, c, d, e, a, 2);
|
||||
R2(block, a, b, c, d, e, 3);
|
||||
R2(block, e, a, b, c, d, 4);
|
||||
R2(block, d, e, a, b, c, 5);
|
||||
R2(block, c, d, e, a, b, 6);
|
||||
R2(block, b, c, d, e, a, 7);
|
||||
R3(block, a, b, c, d, e, 8);
|
||||
R3(block, e, a, b, c, d, 9);
|
||||
R3(block, d, e, a, b, c, 10);
|
||||
R3(block, c, d, e, a, b, 11);
|
||||
R3(block, b, c, d, e, a, 12);
|
||||
R3(block, a, b, c, d, e, 13);
|
||||
R3(block, e, a, b, c, d, 14);
|
||||
R3(block, d, e, a, b, c, 15);
|
||||
R3(block, c, d, e, a, b, 0);
|
||||
R3(block, b, c, d, e, a, 1);
|
||||
R3(block, a, b, c, d, e, 2);
|
||||
R3(block, e, a, b, c, d, 3);
|
||||
R3(block, d, e, a, b, c, 4);
|
||||
R3(block, c, d, e, a, b, 5);
|
||||
R3(block, b, c, d, e, a, 6);
|
||||
R3(block, a, b, c, d, e, 7);
|
||||
R3(block, e, a, b, c, d, 8);
|
||||
R3(block, d, e, a, b, c, 9);
|
||||
R3(block, c, d, e, a, b, 10);
|
||||
R3(block, b, c, d, e, a, 11);
|
||||
R4(block, a, b, c, d, e, 12);
|
||||
R4(block, e, a, b, c, d, 13);
|
||||
R4(block, d, e, a, b, c, 14);
|
||||
R4(block, c, d, e, a, b, 15);
|
||||
R4(block, b, c, d, e, a, 0);
|
||||
R4(block, a, b, c, d, e, 1);
|
||||
R4(block, e, a, b, c, d, 2);
|
||||
R4(block, d, e, a, b, c, 3);
|
||||
R4(block, c, d, e, a, b, 4);
|
||||
R4(block, b, c, d, e, a, 5);
|
||||
R4(block, a, b, c, d, e, 6);
|
||||
R4(block, e, a, b, c, d, 7);
|
||||
R4(block, d, e, a, b, c, 8);
|
||||
R4(block, c, d, e, a, b, 9);
|
||||
R4(block, b, c, d, e, a, 10);
|
||||
R4(block, a, b, c, d, e, 11);
|
||||
R4(block, e, a, b, c, d, 12);
|
||||
R4(block, d, e, a, b, c, 13);
|
||||
R4(block, c, d, e, a, b, 14);
|
||||
R4(block, b, c, d, e, a, 15);
|
||||
|
||||
/* Add the working vars back into digest[] */
|
||||
digest[0] += a;
|
||||
digest[1] += b;
|
||||
digest[2] += c;
|
||||
digest[3] += d;
|
||||
digest[4] += e;
|
||||
|
||||
/* Count the number of transformations */
|
||||
transforms++;
|
||||
}
|
||||
|
||||
|
||||
inline static void buffer_to_block(const std::string &buffer, uint32_t block[BLOCK_INTS])
|
||||
{
|
||||
/* Convert the std::string (byte buffer) to a uint32_t array (MSB) */
|
||||
for (size_t i = 0; i < BLOCK_INTS; i++)
|
||||
{
|
||||
block[i] = (buffer[4*i+3] & 0xff)
|
||||
| (buffer[4*i+2] & 0xff)<<8
|
||||
| (buffer[4*i+1] & 0xff)<<16
|
||||
| (buffer[4*i+0] & 0xff)<<24;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
inline SHA1::SHA1()
|
||||
{
|
||||
reset(digest, buffer, transforms);
|
||||
}
|
||||
|
||||
|
||||
inline void SHA1::update(const std::string &s)
|
||||
{
|
||||
std::istringstream is(s);
|
||||
update(is);
|
||||
}
|
||||
|
||||
|
||||
inline void SHA1::update(std::istream &is)
|
||||
{
|
||||
while (true)
|
||||
{
|
||||
char sbuf[BLOCK_BYTES];
|
||||
is.read(sbuf, BLOCK_BYTES - buffer.size());
|
||||
buffer.append(sbuf, (std::size_t)is.gcount());
|
||||
if (buffer.size() != BLOCK_BYTES)
|
||||
{
|
||||
return;
|
||||
}
|
||||
uint32_t block[BLOCK_INTS];
|
||||
buffer_to_block(buffer, block);
|
||||
transform(digest, block, transforms);
|
||||
buffer.clear();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Add padding and return the message digest.
|
||||
*/
|
||||
|
||||
inline std::string SHA1::final()
|
||||
{
|
||||
/* Total number of hashed bits */
|
||||
uint64_t total_bits = (transforms*BLOCK_BYTES + buffer.size()) * 8;
|
||||
|
||||
/* Padding */
|
||||
buffer += (char)0x80;
|
||||
size_t orig_size = buffer.size();
|
||||
while (buffer.size() < BLOCK_BYTES)
|
||||
{
|
||||
buffer += (char)0x00;
|
||||
}
|
||||
|
||||
uint32_t block[BLOCK_INTS];
|
||||
buffer_to_block(buffer, block);
|
||||
|
||||
if (orig_size > BLOCK_BYTES - 8)
|
||||
{
|
||||
transform(digest, block, transforms);
|
||||
for (size_t i = 0; i < BLOCK_INTS - 2; i++)
|
||||
{
|
||||
block[i] = 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* Append total_bits, split this uint64_t into two uint32_t */
|
||||
block[BLOCK_INTS - 1] = (uint32_t)total_bits;
|
||||
block[BLOCK_INTS - 2] = (uint32_t)(total_bits >> 32);
|
||||
transform(digest, block, transforms);
|
||||
|
||||
/* Hex std::string */
|
||||
std::ostringstream result;
|
||||
for (size_t i = 0; i < sizeof(digest) / sizeof(digest[0]); i++)
|
||||
{
|
||||
result << std::hex << std::setfill('0') << std::setw(8);
|
||||
result << digest[i];
|
||||
}
|
||||
|
||||
/* Reset for next run */
|
||||
reset(digest, buffer, transforms);
|
||||
|
||||
return result.str();
|
||||
}
|
||||
|
||||
|
||||
inline std::string SHA1::from_file(const std::string &filename)
|
||||
{
|
||||
std::ifstream stream(filename.c_str(), std::ios::binary);
|
||||
SHA1 checksum;
|
||||
checksum.update(stream);
|
||||
return checksum.final();
|
||||
}
|
||||
|
||||
|
||||
#endif /* SHA1_HPP */
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
#pragma once
|
||||
|
||||
int writeTree(const char** argv);
|
||||
|
|
@ -0,0 +1,42 @@
|
|||
#include "cat-file.h"
|
||||
|
||||
#include <iostream>
|
||||
#include <filesystem>
|
||||
#include <fstream>
|
||||
#include <string>
|
||||
#include <string_view>
|
||||
|
||||
#include "zstr.hpp"
|
||||
|
||||
int catFile(const int argc, const char **argv)
|
||||
{
|
||||
if (argc < 4)
|
||||
{
|
||||
std::cerr << "please provide proper arguments. example '-p <blob_sha>'.\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
const std::string flag = argv[2];
|
||||
if (flag != "-p")
|
||||
{
|
||||
std::cerr << flag << "is an invalid flag, please use \"-p\"\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
const std::string input = argv[3];
|
||||
const std::string dir = input.substr(0, 2);
|
||||
const std::string file = input.substr(2);
|
||||
|
||||
zstr::ifstream inputFile("./.git/objects/" + dir + "/" + file, std::ofstream::binary);
|
||||
if (!inputFile.is_open())
|
||||
{
|
||||
std::cerr << "Could not open file\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
const std::string output{std::istreambuf_iterator<char>(inputFile), std::istreambuf_iterator<char>()};
|
||||
std::cout << std::string_view(output).substr(output.find('\0') + 1);
|
||||
inputFile.close();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
#include "clone.h"
|
||||
|
||||
#include <iostream>
|
||||
#include <filesystem>
|
||||
#include <fstream>
|
||||
#include <string>
|
||||
#include <string_view>
|
||||
|
||||
int clone(const int argc, const char **argv)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,52 @@
|
|||
#include "hash-object.h"
|
||||
|
||||
#include <filesystem>
|
||||
#include <fstream>
|
||||
#include <iostream>
|
||||
#include <string>
|
||||
#include <string_view>
|
||||
|
||||
#include "sha1.hpp"
|
||||
#include "zstr.hpp"
|
||||
|
||||
int hashObject(const int argc, const char **argv)
|
||||
{
|
||||
std::filesystem::create_directory("./.git/objects");
|
||||
if (argc < 4)
|
||||
{
|
||||
std::cerr << "please provide proper arguments. example '-w <object>'.\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
const std::string_view flag = argv[2];
|
||||
if (flag != "-w")
|
||||
{
|
||||
std::cerr << flag << "is an invalid flag, please use \"-w\"\n";
|
||||
return 1;
|
||||
}
|
||||
const std::string path = argv[3];
|
||||
std::ifstream inputFile("./" + path);
|
||||
if (!inputFile.is_open())
|
||||
{
|
||||
std::cerr << "Could not open file\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
std::string content {std::istreambuf_iterator<char>(inputFile), std::istreambuf_iterator<char>()};
|
||||
std::string objectData = "blob " + std::to_string(content.size()) + '\0' + content;
|
||||
|
||||
SHA1 checksum;
|
||||
checksum.update(objectData);
|
||||
const std::string hash = checksum.final();
|
||||
std::cout << hash << "\n";
|
||||
|
||||
std::filesystem::create_directory("./.git/objects/" + hash.substr(0,2));
|
||||
|
||||
zstr::ofstream outputFile("./.git/objects/" + hash.substr(0,2) + "/" + hash.substr(2));
|
||||
outputFile.write(objectData.c_str(), objectData.size());
|
||||
|
||||
inputFile.close();
|
||||
outputFile.close();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,34 @@
|
|||
#include "init.h"
|
||||
|
||||
#include <filesystem>
|
||||
#include <fstream>
|
||||
#include <iostream>
|
||||
#include <ostream>
|
||||
|
||||
int init()
|
||||
{
|
||||
try
|
||||
{
|
||||
std::filesystem::create_directory(".git");
|
||||
std::filesystem::create_directory(".git/objects");
|
||||
std::filesystem::create_directory(".git/refs");
|
||||
|
||||
std::ofstream headFile(".git/HEAD");
|
||||
if (headFile.is_open()) {
|
||||
headFile << "ref: refs/heads/main\n";
|
||||
headFile.close();
|
||||
} else {
|
||||
std::cerr << "Failed to create .git/HEAD file.\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
std::cout << "Initialized git directory\n";
|
||||
}
|
||||
catch (const std::filesystem::filesystem_error& e)
|
||||
{
|
||||
std::cerr << e.what() << '\n';
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,74 @@
|
|||
#include "ls-tree.h"
|
||||
|
||||
#include <iostream>
|
||||
#include <filesystem>
|
||||
#include <fstream>
|
||||
#include <string>
|
||||
#include <string_view>
|
||||
|
||||
#include "zstr.hpp"
|
||||
|
||||
int lsTree(const int argc, const char **argv)
|
||||
{
|
||||
bool nameOnly = false;
|
||||
if (argc == 4)
|
||||
{
|
||||
const std::string flag = argv[2];
|
||||
if (flag != "--name-only")
|
||||
{
|
||||
std::cerr << flag << "is an invalid flag, please use \"--name-only\"\n";
|
||||
return 1;
|
||||
}
|
||||
nameOnly = true;
|
||||
}
|
||||
|
||||
const std::string input = nameOnly ? argv[3] : argv[2];
|
||||
const std::string dir = input.substr(0, 2);
|
||||
const std::string file = input.substr(2);
|
||||
|
||||
zstr::ifstream inputFile("./.git/objects/" + dir + "/" + file, std::ofstream::binary);
|
||||
if (!inputFile.is_open())
|
||||
{
|
||||
std::cerr << "Could not open file\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
const std::string output{std::istreambuf_iterator<char>(inputFile), std::istreambuf_iterator<char>()};
|
||||
//start right after tree <size>\0
|
||||
size_t startChar = output.find('\0') + 1;
|
||||
size_t nextNullChar = output.find('\0', startChar);
|
||||
|
||||
while (nextNullChar != std::string::npos)
|
||||
{
|
||||
const std::string_view modeAndName = std::string_view(output).substr(startChar, nextNullChar - startChar);
|
||||
const std::string_view mode = modeAndName.substr(0, modeAndName.find(' '));
|
||||
const std::string_view name = modeAndName.substr(modeAndName.find(' ') + 1);
|
||||
const std::string_view hash = std::string_view(output).substr(nextNullChar + 1, 20);
|
||||
|
||||
if (!nameOnly)
|
||||
{
|
||||
if (mode == "100644" or mode == "100755")
|
||||
{
|
||||
std::cout << mode << ' ';
|
||||
std::cout << "blob ";
|
||||
}
|
||||
else
|
||||
{//assume it's a tree obj
|
||||
std::cout << "0" << mode << ' ';
|
||||
std::cout << "tree ";
|
||||
}
|
||||
|
||||
for (const auto& value : hash)
|
||||
std::printf("%02x", static_cast<unsigned char>(value)); // simpler solution
|
||||
|
||||
std::cout << " ";
|
||||
}
|
||||
std::cout << name << "\n";
|
||||
startChar = nextNullChar + 21;
|
||||
nextNullChar = output.find('\0', startChar);
|
||||
}
|
||||
|
||||
inputFile.close();
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,175 @@
|
|||
#include "write-tree.h"
|
||||
|
||||
#include <iostream>
|
||||
#include <filesystem>
|
||||
#include <fstream>
|
||||
#include <string>
|
||||
#include <string_view>
|
||||
|
||||
#include "sha1.hpp"
|
||||
#include "zstr.hpp"
|
||||
|
||||
struct node
|
||||
{
|
||||
std::string name;
|
||||
int mode;
|
||||
std::string hash;
|
||||
};
|
||||
|
||||
uint8_t hexToRaw(char firstDigit, char secondDigit)
|
||||
{
|
||||
uint8_t result = 0;
|
||||
switch (firstDigit)
|
||||
{
|
||||
case '0': result = 0; break;
|
||||
case '1': result = 1 << 4; break;
|
||||
case '2': result = 2 << 4; break;
|
||||
case '3': result = 3 << 4; break;
|
||||
case '4': result = 4 << 4; break;
|
||||
case '5': result = 5 << 4; break;
|
||||
case '6': result = 6 << 4; break;
|
||||
case '7': result = 7 << 4; break;
|
||||
case '8': result = 8 << 4; break;
|
||||
case '9': result = 9 << 4; break;
|
||||
case 'a': result = 10 << 4; break;
|
||||
case 'b': result = 11 << 4; break;
|
||||
case 'c': result = 12 << 4; break;
|
||||
case 'd': result = 13 << 4; break;
|
||||
case 'e': result = 14 << 4; break;
|
||||
case 'f': result = 15 << 4; break;
|
||||
default: result = 0; break;
|
||||
}
|
||||
|
||||
switch (secondDigit)
|
||||
{
|
||||
case '0': result |= 0x0; break;
|
||||
case '1': result |= 0x1; break;
|
||||
case '2': result |= 0x2; break;
|
||||
case '3': result |= 0x3; break;
|
||||
case '4': result |= 0x4; break;
|
||||
case '5': result |= 0x5; break;
|
||||
case '6': result |= 0x6; break;
|
||||
case '7': result |= 0x7; break;
|
||||
case '8': result |= 0x8; break;
|
||||
case '9': result |= 0x9; break;
|
||||
case 'a': result |= 0xa; break;
|
||||
case 'b': result |= 0xb; break;
|
||||
case 'c': result |= 0xc; break;
|
||||
case 'd': result |= 0xd; break;
|
||||
case 'e': result |= 0xe; break;
|
||||
case 'f': result |= 0xf; break;
|
||||
default: result = 0; break;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
std::string hashDir(const std::string& path)
|
||||
{
|
||||
|
||||
std::vector<node> nodes;
|
||||
|
||||
for (const auto& object : std::filesystem::directory_iterator(path))
|
||||
{
|
||||
if (object.is_directory())
|
||||
{
|
||||
nodes.emplace_back(object.path().filename().string(), 40000, hashDir(object.path().string()));
|
||||
}
|
||||
else
|
||||
{
|
||||
std::ifstream file(object.path().string());
|
||||
std::string fileContent {std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>()};
|
||||
|
||||
SHA1 checksum;
|
||||
checksum.update("blob " + std::to_string(fileContent.size()) + '\0' + fileContent);
|
||||
nodes.emplace_back(object.path().filename(), 100644, checksum.final());
|
||||
file.close();
|
||||
}
|
||||
}
|
||||
|
||||
std::sort(nodes.begin(), nodes.end(),
|
||||
[](const auto& first, const auto& second){return first.name < second.name;});
|
||||
|
||||
std::string treeObject;
|
||||
|
||||
for (const auto&[name, mode, hash] : nodes)
|
||||
{
|
||||
treeObject += std::to_string(mode) + " " + name + '\0';
|
||||
for (int i = 0; i < 39; i += 2)
|
||||
{
|
||||
uint8_t byte = hexToRaw(hash.at(i), hash.at(i+1));
|
||||
|
||||
treeObject += static_cast<char>(byte);
|
||||
}
|
||||
}
|
||||
auto temp = treeObject.size();
|
||||
|
||||
treeObject = "tree " + std::to_string(treeObject.size()) + '\0' + treeObject;
|
||||
SHA1 checksum;
|
||||
checksum.update(treeObject);
|
||||
|
||||
return checksum.final();
|
||||
|
||||
}
|
||||
|
||||
int writeTree(const char **argv)
|
||||
{
|
||||
if (!std::filesystem::exists("./.git/objects"))
|
||||
std::filesystem::create_directory("./.git/objects");
|
||||
|
||||
std::vector<node> nodes;
|
||||
|
||||
|
||||
for (const auto& object : std::filesystem::directory_iterator("./"))
|
||||
{
|
||||
if (object.path().filename() == ".git") continue;
|
||||
|
||||
if (object.is_directory())
|
||||
{
|
||||
nodes.emplace_back(object.path().filename().string(), 40000, hashDir(object.path().string()));
|
||||
}
|
||||
else
|
||||
{
|
||||
std::ifstream file(object.path().string());
|
||||
std::string fileContent {std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>()};
|
||||
SHA1 checksum;
|
||||
checksum.update("blob " + std::to_string(fileContent.size()) + '\0' + fileContent);
|
||||
nodes.emplace_back(object.path().filename(), 100644, checksum.final());
|
||||
file.close();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
std::sort(nodes.begin(), nodes.end(),
|
||||
[](const auto& first, const auto& second){return first.name < second.name;});
|
||||
|
||||
std::string treeObject;
|
||||
|
||||
for (const auto&[name, mode, hash] : nodes)
|
||||
{
|
||||
treeObject += std::to_string(mode) + " " + name + '\0';
|
||||
for (int i = 0; i < 39; i += 2)
|
||||
{
|
||||
uint8_t byte = hexToRaw(hash.at(i), hash.at(i+1));
|
||||
|
||||
treeObject += static_cast<char>(byte);
|
||||
}
|
||||
}
|
||||
|
||||
treeObject = "tree " + std::to_string(treeObject.size()) + '\0' + treeObject;
|
||||
|
||||
SHA1 checksum;
|
||||
checksum.update(treeObject);
|
||||
|
||||
const std::string hash = checksum.final();
|
||||
std::cout << hash << "\n";
|
||||
|
||||
std::filesystem::create_directory("./.git/objects/" + hash.substr(0,2));
|
||||
|
||||
zstr::ofstream outputFile("./.git/objects/" + hash.substr(0,2) + "/" + hash.substr(2));
|
||||
outputFile.write(treeObject.c_str(), treeObject.size());
|
||||
|
||||
outputFile.close();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,47 @@
|
|||
#include <iostream>
|
||||
#include <string_view>
|
||||
#include <sstream>
|
||||
#include "commands.h"
|
||||
#include "../include/hash-object.h"
|
||||
|
||||
int main(const int argc, const char** argv)
|
||||
{
|
||||
if (argc < 2)
|
||||
{
|
||||
std::cerr << "please provide a command: init, cat-file, hash-object, ls-tree, write-tree, clone\n";
|
||||
return 1;
|
||||
}
|
||||
|
||||
const std::string_view command = argv[1];
|
||||
|
||||
if (command == "init")
|
||||
{
|
||||
return init();
|
||||
}
|
||||
else if (command == "cat-file")
|
||||
{
|
||||
return catFile(argc, argv);
|
||||
}
|
||||
else if (command == "hash-object")
|
||||
{
|
||||
return hashObject(argc, argv);
|
||||
}
|
||||
else if (command == "ls-tree")
|
||||
{
|
||||
return lsTree(argc, argv);
|
||||
}
|
||||
else if (command == "write-tree")
|
||||
{
|
||||
return writeTree(argv);
|
||||
}
|
||||
else if (command == "clone")
|
||||
{
|
||||
return clone(argc, argv);
|
||||
}
|
||||
else
|
||||
{
|
||||
std::cerr << argv[0] << " is not a valid command\n";
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue