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