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// Scintilla source code edit control
/** @file LexClw.cxx
** Lexer for Clarion.
** 2004/12/17 Updated Lexer
**/
// Copyright 2003-2004 by Ron Schofield <ron@schofieldcomputer.com>
// 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 <ctype.h>
#include "Platform.h"
#include "PropSet.h"
#include "Accessor.h"
#include "StyleContext.h"
#include "KeyWords.h"
#include "Scintilla.h"
#include "SciLexer.h"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
// Is an end of line character
inline bool IsEOL(const int ch) {
return(ch == '\n');
}
// Convert character to uppercase
static char CharacterUpper(char chChar) {
if (chChar < 'a' || chChar > 'z') {
return(chChar);
}
else {
return(static_cast<char>(chChar - 'a' + 'A'));
}
}
// Convert string to uppercase
static void StringUpper(char *szString) {
while (*szString) {
*szString = CharacterUpper(*szString);
szString++;
}
}
// Is a label start character
inline bool IsALabelStart(const int iChar) {
return(isalpha(iChar) || iChar == '_');
}
// Is a label character
inline bool IsALabelCharacter(const int iChar) {
return(isalnum(iChar) || iChar == '_' || iChar == ':');
}
// Is the character is a ! and the the next character is not a !
inline bool IsACommentStart(const int iChar) {
return(iChar == '!');
}
// Is the character a Clarion hex character (ABCDEF)
inline bool IsAHexCharacter(const int iChar, bool bCaseSensitive) {
// Case insensitive.
if (!bCaseSensitive) {
if (strchr("ABCDEFabcdef", iChar) != NULL) {
return(true);
}
}
// Case sensitive
else {
if (strchr("ABCDEF", iChar) != NULL) {
return(true);
}
}
return(false);
}
// Is the character a Clarion base character (B=Binary, O=Octal, H=Hex)
inline bool IsANumericBaseCharacter(const int iChar, bool bCaseSensitive) {
// Case insensitive.
if (!bCaseSensitive) {
// If character is a numeric base character
if (strchr("BOHboh", iChar) != NULL) {
return(true);
}
}
// Case sensitive
else {
// If character is a numeric base character
if (strchr("BOH", iChar) != NULL) {
return(true);
}
}
return(false);
}
// Set the correct numeric constant state
inline bool SetNumericConstantState(StyleContext &scDoc) {
int iPoints = 0; // Point counter
char cNumericString[512]; // Numeric string buffer
// Buffer the current numberic string
scDoc.GetCurrent(cNumericString, sizeof(cNumericString));
// Loop through the string until end of string (NULL termination)
for (int iIndex = 0; cNumericString[iIndex] != '\0'; iIndex++) {
// Depending on the character
switch (cNumericString[iIndex]) {
// Is a . (point)
case '.' :
// Increment point counter
iPoints++;
break;
default :
break;
}
}
// If points found (can be more than one for improper formatted number
if (iPoints > 0) {
return(true);
}
// Else no points found
else {
return(false);
}
}
// Get the next word in uppercase from the current position (keyword lookahead)
inline bool GetNextWordUpper(Accessor &styler, unsigned int uiStartPos, int iLength, char *cWord) {
unsigned int iIndex = 0; // Buffer Index
// Loop through the remaining string from the current position
for (int iOffset = uiStartPos; iOffset < iLength; iOffset++) {
// Get the character from the buffer using the offset
char cCharacter = styler[iOffset];
if (IsEOL(cCharacter)) {
break;
}
// If the character is alphabet character
if (isalpha(cCharacter)) {
// Add UPPERCASE character to the word buffer
cWord[iIndex++] = CharacterUpper(cCharacter);
}
}
// Add null termination
cWord[iIndex] = '\0';
// If no word was found
if (iIndex == 0) {
// Return failure
return(false);
}
// Else word was found
else {
// Return success
return(true);
}
}
// Clarion Language Colouring Procedure
static void ColouriseClarionDoc(unsigned int uiStartPos, int iLength, int iInitStyle, WordList *wlKeywords[], Accessor &accStyler, bool bCaseSensitive) {
int iParenthesesLevel = 0; // Parenthese Level
int iColumn1Label = false; // Label starts in Column 1
WordList &wlClarionKeywords = *wlKeywords[0]; // Clarion Keywords
WordList &wlCompilerDirectives = *wlKeywords[1]; // Compiler Directives
WordList &wlRuntimeExpressions = *wlKeywords[2]; // Runtime Expressions
WordList &wlBuiltInProcsFuncs = *wlKeywords[3]; // Builtin Procedures and Functions
WordList &wlStructsDataTypes = *wlKeywords[4]; // Structures and Data Types
WordList &wlAttributes = *wlKeywords[5]; // Procedure Attributes
WordList &wlStandardEquates = *wlKeywords[6]; // Standard Equates
WordList &wlLabelReservedWords = *wlKeywords[7]; // Clarion Reserved Keywords (Labels)
WordList &wlProcLabelReservedWords = *wlKeywords[8]; // Clarion Reserved Keywords (Procedure Labels)
const char wlProcReservedKeywordList[] =
"PROCEDURE FUNCTION";
WordList wlProcReservedKeywords;
wlProcReservedKeywords.Set(wlProcReservedKeywordList);
const char wlCompilerKeywordList[] =
"COMPILE OMIT";
WordList wlCompilerKeywords;
wlCompilerKeywords.Set(wlCompilerKeywordList);
const char wlLegacyStatementsList[] =
"BOF EOF FUNCTION POINTER SHARE";
WordList wlLegacyStatements;
wlLegacyStatements.Set(wlLegacyStatementsList);
StyleContext scDoc(uiStartPos, iLength, iInitStyle, accStyler);
// lex source code
for (; scDoc.More(); scDoc.Forward())
{
//
// Determine if the current state should terminate.
//
// Label State Handling
if (scDoc.state == SCE_CLW_LABEL) {
// If the character is not a valid label
if (!IsALabelCharacter(scDoc.ch)) {
// If the character is a . (dot syntax)
if (scDoc.ch == '.') {
// Turn off column 1 label flag as label now cannot be reserved work
iColumn1Label = false;
// Uncolour the . (dot) to default state, move forward one character,
// and change back to the label state.
scDoc.SetState(SCE_CLW_DEFAULT);
scDoc.Forward();
scDoc.SetState(SCE_CLW_LABEL);
}
// Else check label
else {
char cLabel[512]; // Label buffer
// Buffer the current label string
scDoc.GetCurrent(cLabel,sizeof(cLabel));
// If case insensitive, convert string to UPPERCASE to match passed keywords.
if (!bCaseSensitive) {
StringUpper(cLabel);
}
// Else if UPPERCASE label string is in the Clarion compiler keyword list
if (wlCompilerKeywords.InList(cLabel) && iColumn1Label){
// change the label to error state
scDoc.ChangeState(SCE_CLW_COMPILER_DIRECTIVE);
}
// Else if UPPERCASE label string is in the Clarion reserved keyword list
else if (wlLabelReservedWords.InList(cLabel) && iColumn1Label){
// change the label to error state
scDoc.ChangeState(SCE_CLW_ERROR);
}
// Else if UPPERCASE label string is
else if (wlProcLabelReservedWords.InList(cLabel) && iColumn1Label) {
char cWord[512]; // Word buffer
// Get the next word from the current position
if (GetNextWordUpper(accStyler,scDoc.currentPos,uiStartPos+iLength,cWord)) {
// If the next word is a procedure reserved word
if (wlProcReservedKeywords.InList(cWord)) {
// Change the label to error state
scDoc.ChangeState(SCE_CLW_ERROR);
}
}
}
// Else if label string is in the compiler directive keyword list
else if (wlCompilerDirectives.InList(cLabel)) {
// change the state to compiler directive state
scDoc.ChangeState(SCE_CLW_COMPILER_DIRECTIVE);
}
// Terminate the label state and set to default state
scDoc.SetState(SCE_CLW_DEFAULT);
}
}
}
// Keyword State Handling
else if (scDoc.state == SCE_CLW_KEYWORD) {
// If character is : (colon)
if (scDoc.ch == ':') {
char cEquate[512]; // Equate buffer
// Move forward to include : (colon) in buffer
scDoc.Forward();
// Buffer the equate string
scDoc.GetCurrent(cEquate,sizeof(cEquate));
// If case insensitive, convert string to UPPERCASE to match passed keywords.
if (!bCaseSensitive) {
StringUpper(cEquate);
}
// If statement string is in the equate list
if (wlStandardEquates.InList(cEquate)) {
// Change to equate state
scDoc.ChangeState(SCE_CLW_STANDARD_EQUATE);
}
}
// If the character is not a valid label character
else if (!IsALabelCharacter(scDoc.ch)) {
char cStatement[512]; // Statement buffer
// Buffer the statement string
scDoc.GetCurrent(cStatement,sizeof(cStatement));
// If case insensitive, convert string to UPPERCASE to match passed keywords.
if (!bCaseSensitive) {
StringUpper(cStatement);
}
// If statement string is in the Clarion keyword list
if (wlClarionKeywords.InList(cStatement)) {
// Change the statement string to the Clarion keyword state
scDoc.ChangeState(SCE_CLW_KEYWORD);
}
// Else if statement string is in the compiler directive keyword list
else if (wlCompilerDirectives.InList(cStatement)) {
// Change the statement string to the compiler directive state
scDoc.ChangeState(SCE_CLW_COMPILER_DIRECTIVE);
}
// Else if statement string is in the runtime expressions keyword list
else if (wlRuntimeExpressions.InList(cStatement)) {
// Change the statement string to the runtime expressions state
scDoc.ChangeState(SCE_CLW_RUNTIME_EXPRESSIONS);
}
// Else if statement string is in the builtin procedures and functions keyword list
else if (wlBuiltInProcsFuncs.InList(cStatement)) {
// Change the statement string to the builtin procedures and functions state
scDoc.ChangeState(SCE_CLW_BUILTIN_PROCEDURES_FUNCTION);
}
// Else if statement string is in the tructures and data types keyword list
else if (wlStructsDataTypes.InList(cStatement)) {
// Change the statement string to the structures and data types state
scDoc.ChangeState(SCE_CLW_STRUCTURE_DATA_TYPE);
}
// Else if statement string is in the procedure attribute keyword list
else if (wlAttributes.InList(cStatement)) {
// Change the statement string to the procedure attribute state
scDoc.ChangeState(SCE_CLW_ATTRIBUTE);
}
// Else if statement string is in the standard equate keyword list
else if (wlStandardEquates.InList(cStatement)) {
// Change the statement string to the standard equate state
scDoc.ChangeState(SCE_CLW_STANDARD_EQUATE);
}
// Else if statement string is in the deprecated or legacy keyword list
else if (wlLegacyStatements.InList(cStatement)) {
// Change the statement string to the standard equate state
scDoc.ChangeState(SCE_CLW_DEPRECATED);
}
// Else the statement string doesn't match any work list
else {
// Change the statement string to the default state
scDoc.ChangeState(SCE_CLW_DEFAULT);
}
// Terminate the keyword state and set to default state
scDoc.SetState(SCE_CLW_DEFAULT);
}
}
// String State Handling
else if (scDoc.state == SCE_CLW_STRING) {
// If the character is an ' (single quote)
if (scDoc.ch == '\'') {
// Set the state to default and move forward colouring
// the ' (single quote) as default state
// terminating the string state
scDoc.SetState(SCE_CLW_DEFAULT);
scDoc.Forward();
}
// If the next character is an ' (single quote)
if (scDoc.chNext == '\'') {
// Move forward one character and set to default state
// colouring the next ' (single quote) as default state
// terminating the string state
scDoc.ForwardSetState(SCE_CLW_DEFAULT);
scDoc.Forward();
}
}
// Picture String State Handling
else if (scDoc.state == SCE_CLW_PICTURE_STRING) {
// If the character is an ( (open parenthese)
if (scDoc.ch == '(') {
// Increment the parenthese level
iParenthesesLevel++;
}
// Else if the character is a ) (close parenthese)
else if (scDoc.ch == ')') {
// If the parenthese level is set to zero
// parentheses matched
if (!iParenthesesLevel) {
scDoc.SetState(SCE_CLW_DEFAULT);
}
// Else parenthese level is greater than zero
// still looking for matching parentheses
else {
// Decrement the parenthese level
iParenthesesLevel--;
}
}
}
// Standard Equate State Handling
else if (scDoc.state == SCE_CLW_STANDARD_EQUATE) {
if (!isalnum(scDoc.ch)) {
scDoc.SetState(SCE_CLW_DEFAULT);
}
}
// Integer Constant State Handling
else if (scDoc.state == SCE_CLW_INTEGER_CONSTANT) {
// If the character is not a digit (0-9)
// or character is not a hexidecimal character (A-F)
// or character is not a . (point)
// or character is not a numberic base character (B,O,H)
if (!(isdigit(scDoc.ch)
|| IsAHexCharacter(scDoc.ch, bCaseSensitive)
|| scDoc.ch == '.'
|| IsANumericBaseCharacter(scDoc.ch, bCaseSensitive))) {
// If the number was a real
if (SetNumericConstantState(scDoc)) {
// Colour the matched string to the real constant state
scDoc.ChangeState(SCE_CLW_REAL_CONSTANT);
}
// Else the number was an integer
else {
// Colour the matched string to an integer constant state
scDoc.ChangeState(SCE_CLW_INTEGER_CONSTANT);
}
// Terminate the integer constant state and set to default state
scDoc.SetState(SCE_CLW_DEFAULT);
}
}
//
// Determine if a new state should be entered.
//
// Beginning of Line Handling
if (scDoc.atLineStart) {
// Reset the column 1 label flag
iColumn1Label = false;
// If column 1 character is a label start character
if (IsALabelStart(scDoc.ch)) {
// Label character is found in column 1
// so set column 1 label flag and clear last column 1 label
iColumn1Label = true;
// Set the state to label
scDoc.SetState(SCE_CLW_LABEL);
}
// else if character is a space or tab
else if (IsASpace(scDoc.ch)){
// Set to default state
scDoc.SetState(SCE_CLW_DEFAULT);
}
// else if comment start (!) or is an * (asterisk)
else if (IsACommentStart(scDoc.ch) || scDoc.ch == '*' ) {
// then set the state to comment.
scDoc.SetState(SCE_CLW_COMMENT);
}
// else the character is a ? (question mark)
else if (scDoc.ch == '?') {
// Change to the compiler directive state, move forward,
// colouring the ? (question mark), change back to default state.
scDoc.ChangeState(SCE_CLW_COMPILER_DIRECTIVE);
scDoc.Forward();
scDoc.SetState(SCE_CLW_DEFAULT);
}
// else an invalid character in column 1
else {
// Set to error state
scDoc.SetState(SCE_CLW_ERROR);
}
}
// End of Line Handling
else if (scDoc.atLineEnd) {
// Reset to the default state at the end of each line.
scDoc.SetState(SCE_CLW_DEFAULT);
}
// Default Handling
else {
// If in default state
if (scDoc.state == SCE_CLW_DEFAULT) {
// If is a letter could be a possible statement
if (isalpha(scDoc.ch)) {
// Set the state to Clarion Keyword and verify later
scDoc.SetState(SCE_CLW_KEYWORD);
}
// else is a number
else if (isdigit(scDoc.ch)) {
// Set the state to Integer Constant and verify later
scDoc.SetState(SCE_CLW_INTEGER_CONSTANT);
}
// else if the start of a comment or a | (line continuation)
else if (IsACommentStart(scDoc.ch) || scDoc.ch == '|') {
// then set the state to comment.
scDoc.SetState(SCE_CLW_COMMENT);
}
// else if the character is a ' (single quote)
else if (scDoc.ch == '\'') {
// If the character is also a ' (single quote)
// Embedded Apostrophe
if (scDoc.chNext == '\'') {
// Move forward colouring it as default state
scDoc.ForwardSetState(SCE_CLW_DEFAULT);
}
else {
// move to the next character and then set the state to comment.
scDoc.ForwardSetState(SCE_CLW_STRING);
}
}
// else the character is an @ (ampersand)
else if (scDoc.ch == '@') {
// Case insensitive.
if (!bCaseSensitive) {
// If character is a valid picture token character
if (strchr("DEKNPSTdeknpst", scDoc.chNext) != NULL) {
// Set to the picture string state
scDoc.SetState(SCE_CLW_PICTURE_STRING);
}
}
// Case sensitive
else {
// If character is a valid picture token character
if (strchr("DEKNPST", scDoc.chNext) != NULL) {
// Set the picture string state
scDoc.SetState(SCE_CLW_PICTURE_STRING);
}
}
}
}
}
}
// lexing complete
scDoc.Complete();
}
// Clarion Language Case Sensitive Colouring Procedure
static void ColouriseClarionDocSensitive(unsigned int uiStartPos, int iLength, int iInitStyle, WordList *wlKeywords[], Accessor &accStyler) {
ColouriseClarionDoc(uiStartPos, iLength, iInitStyle, wlKeywords, accStyler, true);
}
// Clarion Language Case Insensitive Colouring Procedure
static void ColouriseClarionDocInsensitive(unsigned int uiStartPos, int iLength, int iInitStyle, WordList *wlKeywords[], Accessor &accStyler) {
ColouriseClarionDoc(uiStartPos, iLength, iInitStyle, wlKeywords, accStyler, false);
}
// Fill Buffer
static void FillBuffer(unsigned int uiStart, unsigned int uiEnd, Accessor &accStyler, char *szBuffer, unsigned int uiLength) {
unsigned int uiPos = 0;
while ((uiPos < uiEnd - uiStart + 1) && (uiPos < uiLength-1)) {
szBuffer[uiPos] = static_cast<char>(toupper(accStyler[uiStart + uiPos]));
uiPos++;
}
szBuffer[uiPos] = '\0';
}
// Classify Clarion Fold Point
static int ClassifyClarionFoldPoint(int iLevel, const char* szString) {
if (!(isdigit(szString[0]) || (szString[0] == '.'))) {
if (strcmp(szString, "PROCEDURE") == 0) {
// iLevel = SC_FOLDLEVELBASE + 1;
}
else if (strcmp(szString, "MAP") == 0 ||
strcmp(szString,"ACCEPT") == 0 ||
strcmp(szString,"BEGIN") == 0 ||
strcmp(szString,"CASE") == 0 ||
strcmp(szString,"EXECUTE") == 0 ||
strcmp(szString,"IF") == 0 ||
strcmp(szString,"ITEMIZE") == 0 ||
strcmp(szString,"INTERFACE") == 0 ||
strcmp(szString,"JOIN") == 0 ||
strcmp(szString,"LOOP") == 0 ||
strcmp(szString,"MODULE") == 0 ||
strcmp(szString,"RECORD") == 0) {
iLevel++;
}
else if (strcmp(szString, "APPLICATION") == 0 ||
strcmp(szString, "CLASS") == 0 ||
strcmp(szString, "DETAIL") == 0 ||
strcmp(szString, "FILE") == 0 ||
strcmp(szString, "FOOTER") == 0 ||
strcmp(szString, "FORM") == 0 ||
strcmp(szString, "GROUP") == 0 ||
strcmp(szString, "HEADER") == 0 ||
strcmp(szString, "INTERFACE") == 0 ||
strcmp(szString, "MENU") == 0 ||
strcmp(szString, "MENUBAR") == 0 ||
strcmp(szString, "OLE") == 0 ||
strcmp(szString, "OPTION") == 0 ||
strcmp(szString, "QUEUE") == 0 ||
strcmp(szString, "REPORT") == 0 ||
strcmp(szString, "SHEET") == 0 ||
strcmp(szString, "TAB") == 0 ||
strcmp(szString, "TOOLBAR") == 0 ||
strcmp(szString, "VIEW") == 0 ||
strcmp(szString, "WINDOW") == 0) {
iLevel++;
}
else if (strcmp(szString, "END") == 0 ||
strcmp(szString, "UNTIL") == 0 ||
strcmp(szString, "WHILE") == 0) {
iLevel--;
}
}
return(iLevel);
}
// Clarion Language Folding Procedure
static void FoldClarionDoc(unsigned int uiStartPos, int iLength, int iInitStyle, WordList *[], Accessor &accStyler) {
unsigned int uiEndPos = uiStartPos + iLength;
int iLineCurrent = accStyler.GetLine(uiStartPos);
int iLevelPrev = accStyler.LevelAt(iLineCurrent) & SC_FOLDLEVELNUMBERMASK;
int iLevelCurrent = iLevelPrev;
char chNext = accStyler[uiStartPos];
int iStyle = iInitStyle;
int iStyleNext = accStyler.StyleAt(uiStartPos);
int iVisibleChars = 0;
int iLastStart = 0;
for (unsigned int uiPos = uiStartPos; uiPos < uiEndPos; uiPos++) {
char chChar = chNext;
chNext = accStyler.SafeGetCharAt(uiPos + 1);
int iStylePrev = iStyle;
iStyle = iStyleNext;
iStyleNext = accStyler.StyleAt(uiPos + 1);
bool bEOL = (chChar == '\r' && chNext != '\n') || (chChar == '\n');
if (iStylePrev == SCE_CLW_DEFAULT) {
if (iStyle == SCE_CLW_KEYWORD || iStyle == SCE_CLW_STRUCTURE_DATA_TYPE) {
// Store last word start point.
iLastStart = uiPos;
}
}
if (iStylePrev == SCE_CLW_KEYWORD || iStylePrev == SCE_CLW_STRUCTURE_DATA_TYPE) {
if(iswordchar(chChar) && !iswordchar(chNext)) {
char chBuffer[100];
FillBuffer(iLastStart, uiPos, accStyler, chBuffer, sizeof(chBuffer));
iLevelCurrent = ClassifyClarionFoldPoint(iLevelCurrent,chBuffer);
// if ((iLevelCurrent == SC_FOLDLEVELBASE + 1) && iLineCurrent > 1) {
// accStyler.SetLevel(iLineCurrent-1,SC_FOLDLEVELBASE);
// iLevelPrev = SC_FOLDLEVELBASE;
// }
}
}
if (bEOL) {
int iLevel = iLevelPrev;
if ((iLevelCurrent > iLevelPrev) && (iVisibleChars > 0))
iLevel |= SC_FOLDLEVELHEADERFLAG;
if (iLevel != accStyler.LevelAt(iLineCurrent)) {
accStyler.SetLevel(iLineCurrent,iLevel);
}
iLineCurrent++;
iLevelPrev = iLevelCurrent;
iVisibleChars = 0;
}
if (!isspacechar(chChar))
iVisibleChars++;
}
// Fill in the real level of the next line, keeping the current flags
// as they will be filled in later.
int iFlagsNext = accStyler.LevelAt(iLineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
accStyler.SetLevel(iLineCurrent, iLevelPrev | iFlagsNext);
}
// Word List Descriptions
static const char * const rgWordListDescriptions[] = {
"Clarion Keywords",
"Compiler Directives",
"Built-in Procedures and Functions",
"Runtime Expressions",
"Structure and Data Types",
"Attributes",
"Standard Equates",
"Reserved Words (Labels)",
"Reserved Words (Procedure Labels)",
0,
};
// Case Sensitive Clarion Language Lexer
LexerModule lmClw(SCLEX_CLW, ColouriseClarionDocSensitive, "clarion", FoldClarionDoc, rgWordListDescriptions);
// Case Insensitive Clarion Language Lexer
LexerModule lmClwNoCase(SCLEX_CLWNOCASE, ColouriseClarionDocInsensitive, "clarionnocase", FoldClarionDoc, rgWordListDescriptions);
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