mirror of
https://github.com/scratchfoundation/bgfx.git
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506 lines
16 KiB
C++
506 lines
16 KiB
C++
// Scintilla\ source code edit control
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/** @file LexTCMD.cxx
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** Lexer for Take Command / TCC batch scripts (.bat, .btm, .cmd).
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**/
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// Written by Rex Conn (rconn [at] jpsoft [dot] com)
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// based on the CMD lexer
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// The License.txt file describes the conditions under which this software may be distributed.
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <ctype.h>
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#include "ILexer.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "WordList.h"
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#include "LexAccessor.h"
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#include "Accessor.h"
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#include "StyleContext.h"
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#include "CharacterSet.h"
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#include "LexerModule.h"
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#ifdef SCI_NAMESPACE
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using namespace Scintilla;
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#endif
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static bool IsAlphabetic(int ch) {
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return IsASCII(ch) && isalpha(ch);
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}
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static inline bool AtEOL(Accessor &styler, unsigned int i) {
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return (styler[i] == '\n') || ((styler[i] == '\r') && (styler.SafeGetCharAt(i + 1) != '\n'));
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}
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// Tests for BATCH Operators
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static bool IsBOperator(char ch) {
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return (ch == '=') || (ch == '+') || (ch == '>') || (ch == '<') || (ch == '|') || (ch == '&') || (ch == '!') || (ch == '?') || (ch == '*') || (ch == '(') || (ch == ')');
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}
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// Tests for BATCH Separators
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static bool IsBSeparator(char ch) {
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return (ch == '\\') || (ch == '.') || (ch == ';') || (ch == ' ') || (ch == '\t') || (ch == '[') || (ch == ']') || (ch == '\"') || (ch == '\'') || (ch == '/');
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}
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// Find length of CMD FOR variable with modifier (%~...) or return 0
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static unsigned int GetBatchVarLen( char *wordBuffer )
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{
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int nLength = 0;
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if ( wordBuffer[0] == '%' ) {
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if ( wordBuffer[1] == '~' )
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nLength = 2;
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else if (( wordBuffer[1] == '%' ) && ( wordBuffer[2] == '~' ))
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nLength++;
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else
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return 0;
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for ( ; ( wordBuffer[nLength] ); nLength++ ) {
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switch ( toupper(wordBuffer[nLength]) ) {
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case 'A':
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// file attributes
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case 'D':
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// drive letter only
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case 'F':
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// fully qualified path name
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case 'N':
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// filename only
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case 'P':
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// path only
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case 'S':
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// short name
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case 'T':
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// date / time of file
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case 'X':
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// file extension only
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case 'Z':
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// file size
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break;
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default:
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return nLength;
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}
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}
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}
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return nLength;
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}
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static void ColouriseTCMDLine( char *lineBuffer, unsigned int lengthLine, unsigned int startLine, unsigned int endPos, WordList *keywordlists[], Accessor &styler)
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{
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unsigned int offset = 0; // Line Buffer Offset
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char wordBuffer[260]; // Word Buffer - large to catch long paths
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unsigned int wbl; // Word Buffer Length
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unsigned int wbo; // Word Buffer Offset - also Special Keyword Buffer Length
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WordList &keywords = *keywordlists[0]; // Internal Commands
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// WordList &keywords2 = *keywordlists[1]; // Aliases (optional)
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bool isDelayedExpansion = 1; // !var!
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bool continueProcessing = true; // Used to toggle Regular Keyword Checking
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// Special Keywords are those that allow certain characters without whitespace after the command
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// Examples are: cd. cd\ echo: echo. path=
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bool inString = false; // Used for processing while ""
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// Special Keyword Buffer used to determine if the first n characters is a Keyword
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char sKeywordBuffer[260] = ""; // Special Keyword Buffer
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bool sKeywordFound; // Exit Special Keyword for-loop if found
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// Skip leading whitespace
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while ((offset < lengthLine) && (isspacechar(lineBuffer[offset]))) {
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offset++;
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}
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// Colorize Default Text
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styler.ColourTo(startLine + offset - 1, SCE_TCMD_DEFAULT);
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if ( offset >= lengthLine )
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return;
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// Check for Fake Label (Comment) or Real Label - return if found
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if (lineBuffer[offset] == ':') {
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if (lineBuffer[offset + 1] == ':') {
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// Colorize Fake Label (Comment) - :: is the same as REM
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styler.ColourTo(endPos, SCE_TCMD_COMMENT);
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} else {
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// Colorize Real Label
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styler.ColourTo(endPos, SCE_TCMD_LABEL);
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}
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return;
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// Check for Comment - return if found
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} else if (( CompareNCaseInsensitive(lineBuffer+offset, "rem", 3) == 0 ) && (( lineBuffer[offset+3] == 0 ) || ( isspace(lineBuffer[offset+3] )))) {
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styler.ColourTo(endPos, SCE_TCMD_COMMENT);
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return;
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// Check for Drive Change (Drive Change is internal command) - return if found
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} else if ((IsAlphabetic(lineBuffer[offset])) &&
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(lineBuffer[offset + 1] == ':') &&
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((isspacechar(lineBuffer[offset + 2])) ||
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(((lineBuffer[offset + 2] == '\\')) &&
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(isspacechar(lineBuffer[offset + 3]))))) {
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// Colorize Regular Keyword
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styler.ColourTo(endPos, SCE_TCMD_WORD);
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return;
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}
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// Check for Hide Command (@ECHO OFF/ON)
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if (lineBuffer[offset] == '@') {
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styler.ColourTo(startLine + offset, SCE_TCMD_HIDE);
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offset++;
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}
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// Skip whitespace
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while ((offset < lengthLine) && (isspacechar(lineBuffer[offset]))) {
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offset++;
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}
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// Read remainder of line word-at-a-time or remainder-of-word-at-a-time
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while (offset < lengthLine) {
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if (offset > startLine) {
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// Colorize Default Text
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styler.ColourTo(startLine + offset - 1, SCE_TCMD_DEFAULT);
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}
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// Copy word from Line Buffer into Word Buffer
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wbl = 0;
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for (; offset < lengthLine && ( wbl < 260 ) && !isspacechar(lineBuffer[offset]); wbl++, offset++) {
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wordBuffer[wbl] = static_cast<char>(tolower(lineBuffer[offset]));
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}
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wordBuffer[wbl] = '\0';
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wbo = 0;
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// Check for Separator
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if (IsBSeparator(wordBuffer[0])) {
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// Reset Offset to re-process remainder of word
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offset -= (wbl - 1);
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// Colorize Default Text
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styler.ColourTo(startLine + offset - 1, SCE_BAT_DEFAULT);
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if (wordBuffer[0] == '"')
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inString = !inString;
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// Check for Regular expression
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} else if (( wordBuffer[0] == ':' ) && ( wordBuffer[1] == ':' ) && (continueProcessing)) {
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// Colorize Regular exoressuin
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styler.ColourTo(startLine + offset - 1, SCE_TCMD_DEFAULT);
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// No need to Reset Offset
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// Check for Labels in text (... :label)
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} else if (wordBuffer[0] == ':' && isspacechar(lineBuffer[offset - wbl - 1])) {
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// Colorize Default Text
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styler.ColourTo(startLine + offset - 1 - wbl, SCE_TCMD_DEFAULT);
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// Colorize Label
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styler.ColourTo(startLine + offset - 1, SCE_TCMD_CLABEL);
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// No need to Reset Offset
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// Check for delayed expansion Variable (!x...!)
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} else if (isDelayedExpansion && wordBuffer[0] == '!') {
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// Colorize Default Text
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styler.ColourTo(startLine + offset - 1 - wbl, SCE_TCMD_DEFAULT);
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wbo++;
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// Search to end of word for second !
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while ((wbo < wbl) && (wordBuffer[wbo] != '!') && (!IsBOperator(wordBuffer[wbo])) && (!IsBSeparator(wordBuffer[wbo]))) {
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wbo++;
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}
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if (wordBuffer[wbo] == '!') {
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wbo++;
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// Colorize Environment Variable
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styler.ColourTo(startLine + offset - 1 - (wbl - wbo), SCE_TCMD_EXPANSION);
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} else {
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wbo = 1;
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// Colorize Symbol
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styler.ColourTo(startLine + offset - 1 - (wbl - 1), SCE_TCMD_DEFAULT);
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}
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// Reset Offset to re-process remainder of word
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offset -= (wbl - wbo);
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// Check for Regular Keyword in list
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} else if ((keywords.InList(wordBuffer)) && (!inString) && (continueProcessing)) {
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// ECHO, PATH, and PROMPT require no further Regular Keyword Checking
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if ((CompareCaseInsensitive(wordBuffer, "echo") == 0) ||
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(CompareCaseInsensitive(sKeywordBuffer, "echos") == 0) ||
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(CompareCaseInsensitive(sKeywordBuffer, "echoerr") == 0) ||
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(CompareCaseInsensitive(sKeywordBuffer, "echoserr") == 0) ||
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(CompareCaseInsensitive(wordBuffer, "path") == 0) ||
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(CompareCaseInsensitive(wordBuffer, "prompt") == 0)) {
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continueProcessing = false;
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}
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// Colorize Regular keyword
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styler.ColourTo(startLine + offset - 1, SCE_TCMD_WORD);
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// No need to Reset Offset
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} else if ((wordBuffer[0] != '%') && (wordBuffer[0] != '!') && (!IsBOperator(wordBuffer[0])) && (!inString) && (continueProcessing)) {
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// a few commands accept "illegal" syntax -- cd\, echo., etc.
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sscanf( wordBuffer, "%[^.<>|&=\\/]", sKeywordBuffer );
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sKeywordFound = false;
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if ((CompareCaseInsensitive(sKeywordBuffer, "echo") == 0) ||
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(CompareCaseInsensitive(sKeywordBuffer, "echos") == 0) ||
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(CompareCaseInsensitive(sKeywordBuffer, "echoerr") == 0) ||
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(CompareCaseInsensitive(sKeywordBuffer, "echoserr") == 0) ||
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(CompareCaseInsensitive(sKeywordBuffer, "cd") == 0) ||
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(CompareCaseInsensitive(sKeywordBuffer, "path") == 0) ||
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(CompareCaseInsensitive(sKeywordBuffer, "prompt") == 0)) {
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// no further Regular Keyword Checking
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continueProcessing = false;
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sKeywordFound = true;
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wbo = (unsigned int)strlen( sKeywordBuffer );
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// Colorize Special Keyword as Regular Keyword
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styler.ColourTo(startLine + offset - 1 - (wbl - wbo), SCE_TCMD_WORD);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - wbo);
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}
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// Check for Default Text
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if (!sKeywordFound) {
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wbo = 0;
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// Read up to %, Operator or Separator
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while ((wbo < wbl) && (wordBuffer[wbo] != '%') && (!isDelayedExpansion || wordBuffer[wbo] != '!') && (!IsBOperator(wordBuffer[wbo])) && (!IsBSeparator(wordBuffer[wbo]))) {
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wbo++;
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}
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// Colorize Default Text
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styler.ColourTo(startLine + offset - 1 - (wbl - wbo), SCE_TCMD_DEFAULT);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - wbo);
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}
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// Check for Argument (%n), Environment Variable (%x...%) or Local Variable (%%a)
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} else if (wordBuffer[0] == '%') {
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unsigned int varlen;
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unsigned int n = 1;
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// Colorize Default Text
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styler.ColourTo(startLine + offset - 1 - wbl, SCE_TCMD_DEFAULT);
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wbo++;
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// check for %[nn] syntax
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if ( wordBuffer[1] == '[' ) {
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n++;
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while ((n < wbl) && (wordBuffer[n] != ']')) {
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n++;
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}
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if ( wordBuffer[n] == ']' )
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n++;
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goto ColorizeArg;
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}
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// Search to end of word for second % or to the first terminator (can be a long path)
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while ((wbo < wbl) && (wordBuffer[wbo] != '%') && (!IsBOperator(wordBuffer[wbo])) && (!IsBSeparator(wordBuffer[wbo]))) {
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wbo++;
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}
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// Check for Argument (%n) or (%*)
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if (((isdigit(wordBuffer[1])) || (wordBuffer[1] == '*')) && (wordBuffer[wbo] != '%')) {
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while (( wordBuffer[n] ) && ( strchr( "%0123456789*#$", wordBuffer[n] ) != NULL ))
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n++;
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ColorizeArg:
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// Colorize Argument
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styler.ColourTo(startLine + offset - 1 - (wbl - n), SCE_TCMD_IDENTIFIER);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - n);
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// Check for Variable with modifiers (%~...)
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} else if ((varlen = GetBatchVarLen(wordBuffer)) != 0) {
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// Colorize Variable
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styler.ColourTo(startLine + offset - 1 - (wbl - varlen), SCE_TCMD_IDENTIFIER);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - varlen);
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// Check for Environment Variable (%x...%)
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} else if (( wordBuffer[1] ) && ( wordBuffer[1] != '%')) {
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if ( wordBuffer[wbo] == '%' )
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wbo++;
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// Colorize Environment Variable
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styler.ColourTo(startLine + offset - 1 - (wbl - wbo), SCE_TCMD_ENVIRONMENT);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - wbo);
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// Check for Local Variable (%%a)
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} else if ( (wbl > 2) && (wordBuffer[1] == '%') && (wordBuffer[2] != '%') && (!IsBOperator(wordBuffer[2])) && (!IsBSeparator(wordBuffer[2]))) {
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n = 2;
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while (( wordBuffer[n] ) && (!IsBOperator(wordBuffer[n])) && (!IsBSeparator(wordBuffer[n])))
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n++;
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// Colorize Local Variable
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styler.ColourTo(startLine + offset - 1 - (wbl - n), SCE_TCMD_IDENTIFIER);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - n);
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// Check for %%
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} else if ((wbl > 1) && (wordBuffer[1] == '%')) {
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// Colorize Symbols
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styler.ColourTo(startLine + offset - 1 - (wbl - 2), SCE_TCMD_DEFAULT);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - 2);
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} else {
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// Colorize Symbol
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styler.ColourTo(startLine + offset - 1 - (wbl - 1), SCE_TCMD_DEFAULT);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - 1);
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}
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// Check for Operator
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} else if (IsBOperator(wordBuffer[0])) {
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// Colorize Default Text
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styler.ColourTo(startLine + offset - 1 - wbl, SCE_TCMD_DEFAULT);
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// Check for Pipe, compound, or conditional Operator
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if ((wordBuffer[0] == '|') || (wordBuffer[0] == '&')) {
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// Colorize Pipe Operator
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styler.ColourTo(startLine + offset - 1 - (wbl - 1), SCE_TCMD_OPERATOR);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - 1);
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continueProcessing = true;
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// Check for Other Operator
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} else {
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// Check for > Operator
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if ((wordBuffer[0] == '>') || (wordBuffer[0] == '<')) {
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// Turn Keyword and External Command / Program checking back on
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continueProcessing = true;
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}
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// Colorize Other Operator
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if (!inString || !(wordBuffer[0] == '(' || wordBuffer[0] == ')'))
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styler.ColourTo(startLine + offset - 1 - (wbl - 1), SCE_TCMD_OPERATOR);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - 1);
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}
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// Check for Default Text
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} else {
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// Read up to %, Operator or Separator
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while ((wbo < wbl) && (wordBuffer[wbo] != '%') && (!isDelayedExpansion || wordBuffer[wbo] != '!') && (!IsBOperator(wordBuffer[wbo])) && (!IsBSeparator(wordBuffer[wbo]))) {
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wbo++;
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}
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// Colorize Default Text
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styler.ColourTo(startLine + offset - 1 - (wbl - wbo), SCE_TCMD_DEFAULT);
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// Reset Offset to re-process remainder of word
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offset -= (wbl - wbo);
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}
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// Skip whitespace - nothing happens if Offset was Reset
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while ((offset < lengthLine) && (isspacechar(lineBuffer[offset]))) {
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offset++;
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}
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}
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// Colorize Default Text for remainder of line - currently not lexed
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styler.ColourTo(endPos, SCE_TCMD_DEFAULT);
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}
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static void ColouriseTCMDDoc( unsigned int startPos, int length, int /*initStyle*/, WordList *keywordlists[], Accessor &styler )
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{
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char lineBuffer[16384];
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styler.StartAt(startPos);
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styler.StartSegment(startPos);
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unsigned int linePos = 0;
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unsigned int startLine = startPos;
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for (unsigned int i = startPos; i < startPos + length; i++) {
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lineBuffer[linePos++] = styler[i];
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if (AtEOL(styler, i) || (linePos >= sizeof(lineBuffer) - 1)) {
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// End of line (or of line buffer) met, colourise it
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lineBuffer[linePos] = '\0';
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ColouriseTCMDLine(lineBuffer, linePos, startLine, i, keywordlists, styler);
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linePos = 0;
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startLine = i + 1;
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}
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}
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if (linePos > 0) { // Last line does not have ending characters
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lineBuffer[linePos] = '\0';
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ColouriseTCMDLine(lineBuffer, linePos, startLine, startPos + length - 1, keywordlists, styler);
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}
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}
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// Convert string to upper case
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static void StrUpr(char *s) {
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while (*s) {
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*s = MakeUpperCase(*s);
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s++;
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}
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}
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// Folding support (for DO, IFF, SWITCH, TEXT, and command groups)
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static void FoldTCMDDoc(unsigned int startPos, int length, int, WordList *[], Accessor &styler)
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{
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int line = styler.GetLine(startPos);
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int level = styler.LevelAt(line);
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int levelIndent = 0;
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unsigned int endPos = startPos + length;
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char s[16] = "";
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char chPrev = styler.SafeGetCharAt(startPos - 1);
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// Scan for ( and )
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for (unsigned int i = startPos; i < endPos; i++) {
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int c = styler.SafeGetCharAt(i, '\n');
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int style = styler.StyleAt(i);
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bool bLineStart = ((chPrev == '\r') || (chPrev == '\n')) || i == 0;
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if (style == SCE_TCMD_OPERATOR) {
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// CheckFoldPoint
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if (c == '(') {
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levelIndent += 1;
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} else if (c == ')') {
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levelIndent -= 1;
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}
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}
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if (( bLineStart ) && ( style == SCE_TCMD_WORD )) {
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for (unsigned int j = 0; j < 10; j++) {
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if (!iswordchar(styler[i + j])) {
|
|
break;
|
|
}
|
|
s[j] = styler[i + j];
|
|
s[j + 1] = '\0';
|
|
}
|
|
|
|
StrUpr( s );
|
|
if ((strcmp(s, "DO") == 0) || (strcmp(s, "IFF") == 0) || (strcmp(s, "SWITCH") == 0) || (strcmp(s, "TEXT") == 0)) {
|
|
levelIndent++;
|
|
} else if ((strcmp(s, "ENDDO") == 0) || (strcmp(s, "ENDIFF") == 0) || (strcmp(s, "ENDSWITCH") == 0) || (strcmp(s, "ENDTEXT") == 0)) {
|
|
levelIndent--;
|
|
}
|
|
}
|
|
|
|
if (c == '\n') { // line end
|
|
if (levelIndent > 0) {
|
|
level |= SC_FOLDLEVELHEADERFLAG;
|
|
}
|
|
if (level != styler.LevelAt(line))
|
|
styler.SetLevel(line, level);
|
|
level += levelIndent;
|
|
if ((level & SC_FOLDLEVELNUMBERMASK) < SC_FOLDLEVELBASE)
|
|
level = SC_FOLDLEVELBASE;
|
|
line++;
|
|
// reset state
|
|
levelIndent = 0;
|
|
level &= ~SC_FOLDLEVELHEADERFLAG;
|
|
level &= ~SC_FOLDLEVELWHITEFLAG;
|
|
}
|
|
|
|
chPrev = c;
|
|
}
|
|
}
|
|
|
|
static const char *const tcmdWordListDesc[] = {
|
|
"Internal Commands",
|
|
"Aliases",
|
|
0
|
|
};
|
|
|
|
LexerModule lmTCMD(SCLEX_TCMD, ColouriseTCMDDoc, "tcmd", FoldTCMDDoc, tcmdWordListDesc);
|