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d2c47132ad
Implement text file comparison by using file mappings (both Unicode and ANSI). CORE-17500
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/*
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* PROJECT: ReactOS FC Command
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: Comparing files
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* COPYRIGHT: Copyright 2021 Katayama Hirofumi MZ (katayama.hirofumi.mz@gmail.com)
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*/
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#pragma once
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#ifdef __REACTOS__
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#include <windef.h>
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#include <winbase.h>
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#include <winuser.h>
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#include <winnls.h>
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#else
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#include <windows.h>
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#endif
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#include <wine/list.h>
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#include "resource.h"
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// See also: https://stackoverflow.com/questions/33125766/compare-files-with-a-cmd
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typedef enum FCRET // return code of FC command
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{
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FCRET_INVALID = -1,
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FCRET_IDENTICAL = 0,
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FCRET_DIFFERENT = 1,
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FCRET_CANT_FIND = 2,
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FCRET_NO_MORE_DATA = 3 // (extension)
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} FCRET;
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typedef struct NODE_W
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{
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struct list entry;
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LPWSTR pszLine;
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LPWSTR pszComp; // compressed
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DWORD lineno;
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DWORD hash;
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} NODE_W;
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typedef struct NODE_A
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{
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struct list entry;
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LPSTR pszLine;
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LPSTR pszComp; // compressed
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DWORD lineno;
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DWORD hash;
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} NODE_A;
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#define FLAG_A (1 << 0) // abbreviation
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#define FLAG_B (1 << 1) // binary
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#define FLAG_C (1 << 2) // ignore cases
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#define FLAG_L (1 << 3) // ASCII mode
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#define FLAG_LBn (1 << 4) // line buffers
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#define FLAG_N (1 << 5) // show line numbers
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#define FLAG_OFFLINE (1 << 6) // ???
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#define FLAG_T (1 << 7) // prevent fc from converting tabs to spaces
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#define FLAG_U (1 << 8) // Unicode
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#define FLAG_W (1 << 9) // compress white space
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#define FLAG_nnnn (1 << 10) // ???
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#define FLAG_HELP (1 << 11) // show usage
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typedef struct FILECOMPARE
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{
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DWORD dwFlags; // FLAG_...
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INT n; // # of line buffers
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INT nnnn; // retry count before resynch
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LPCWSTR file[2];
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struct list list[2];
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} FILECOMPARE;
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// text.h
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FCRET TextCompareW(FILECOMPARE *pFC,
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HANDLE *phMapping0, const LARGE_INTEGER *pcb0,
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HANDLE *phMapping1, const LARGE_INTEGER *pcb1);
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FCRET TextCompareA(FILECOMPARE *pFC,
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HANDLE *phMapping0, const LARGE_INTEGER *pcb0,
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HANDLE *phMapping1, const LARGE_INTEGER *pcb1);
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// fc.c
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VOID PrintLineW(const FILECOMPARE *pFC, DWORD lineno, LPCWSTR psz);
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VOID PrintLineA(const FILECOMPARE *pFC, DWORD lineno, LPCSTR psz);
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VOID PrintCaption(LPCWSTR file);
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VOID PrintEndOfDiff(VOID);
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VOID PrintDots(VOID);
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FCRET NoDifference(VOID);
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FCRET Different(LPCWSTR file0, LPCWSTR file1);
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FCRET LongerThan(LPCWSTR file0, LPCWSTR file1);
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FCRET OutOfMemory(VOID);
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FCRET CannotRead(LPCWSTR file);
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FCRET InvalidSwitch(VOID);
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FCRET ResyncFailed(VOID);
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HANDLE DoOpenFileForInput(LPCWSTR file);
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#ifdef _WIN64
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#define MAX_VIEW_SIZE (256 * 1024 * 1024) // 256 MB
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#else
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#define MAX_VIEW_SIZE (64 * 1024 * 1024) // 64 MB
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#endif
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