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ZoneBuilder/Documents/Scintilla/LexFortran.cxx

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// Scintilla source code edit control
/** @file LexFortran.cxx
** Lexer for Fortran.
** Writen by Chuan-jian Shen, Last changed Sep. 2003
**/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
/***************************************/
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stdarg.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
/***********************************************/
static inline bool IsAWordChar(const int ch) {
return (ch < 0x80) && (isalnum(ch) || ch == '_' || ch == '%');
}
/**********************************************/
static inline bool IsAWordStart(const int ch) {
return (ch < 0x80) && (isalnum(ch));
}
/***************************************/
inline bool IsABlank(unsigned int ch) {
return (ch == ' ') || (ch == 0x09) || (ch == 0x0b) ;
}
/***************************************/
inline bool IsALineEnd(char ch) {
return ((ch == '\n') || (ch == '\r')) ;
}
/***************************************/
unsigned int GetContinuedPos(unsigned int pos, Accessor &styler) {
while (!IsALineEnd(styler.SafeGetCharAt(pos++))) continue;
if (styler.SafeGetCharAt(pos) == '\n') pos++;
while (IsABlank(styler.SafeGetCharAt(pos++))) continue;
char chCur = styler.SafeGetCharAt(pos);
if (chCur == '&') {
while (IsABlank(styler.SafeGetCharAt(++pos))) continue;
return pos;
} else {
return pos;
}
}
/***************************************/
static void ColouriseFortranDoc(unsigned int startPos, int length, int initStyle,
WordList *keywordlists[], Accessor &styler, bool isFixFormat) {
WordList &keywords = *keywordlists[0];
WordList &keywords2 = *keywordlists[1];
WordList &keywords3 = *keywordlists[2];
/***************************************/
int posLineStart = 0, numNonBlank = 0, prevState = 0;
int endPos = startPos + length;
/***************************************/
// backtrack to the nearest keyword
while ((startPos > 1) && (styler.StyleAt(startPos) != SCE_F_WORD)) {
startPos--;
}
startPos = styler.LineStart(styler.GetLine(startPos));
initStyle = styler.StyleAt(startPos - 1);
StyleContext sc(startPos, endPos-startPos, initStyle, styler);
/***************************************/
for (; sc.More(); sc.Forward()) {
// remember the start position of the line
if (sc.atLineStart) {
posLineStart = sc.currentPos;
numNonBlank = 0;
sc.SetState(SCE_F_DEFAULT);
}
if (!IsASpaceOrTab(sc.ch)) numNonBlank ++;
/***********************************************/
// Handle the fix format generically
int toLineStart = sc.currentPos - posLineStart;
if (isFixFormat && (toLineStart < 6 || toLineStart > 72)) {
if (toLineStart == 0 && (tolower(sc.ch) == 'c' || sc.ch == '*') || sc.ch == '!') {
if (sc.MatchIgnoreCase("cdec$") || sc.MatchIgnoreCase("*dec$") || sc.MatchIgnoreCase("!dec$") ||
sc.MatchIgnoreCase("cdir$") || sc.MatchIgnoreCase("*dir$") || sc.MatchIgnoreCase("!dir$") ||
sc.MatchIgnoreCase("cms$") || sc.MatchIgnoreCase("*ms$") || sc.MatchIgnoreCase("!ms$") ||
sc.chNext == '$') {
sc.SetState(SCE_F_PREPROCESSOR);
} else {
sc.SetState(SCE_F_COMMENT);
}
while (!sc.atLineEnd && sc.More()) sc.Forward(); // Until line end
} else if (toLineStart > 72) {
sc.SetState(SCE_F_COMMENT);
while (!sc.atLineEnd && sc.More()) sc.Forward(); // Until line end
} else if (toLineStart < 5) {
if (IsADigit(sc.ch))
sc.SetState(SCE_F_LABEL);
else
sc.SetState(SCE_F_DEFAULT);
} else if (toLineStart == 5) {
if (!IsASpace(sc.ch) && sc.ch != '0') {
sc.SetState(SCE_F_CONTINUATION);
sc.ForwardSetState(prevState);
} else
sc.SetState(SCE_F_DEFAULT);
}
continue;
}
/***************************************/
// Handle line continuation generically.
if (!isFixFormat && sc.ch == '&') {
char chTemp = ' ';
int j = 1;
while (IsABlank(chTemp) && j<132) {
chTemp = static_cast<char>(sc.GetRelative(j));
j++;
}
if (chTemp == '!') {
sc.SetState(SCE_F_CONTINUATION);
if (sc.chNext == '!') sc.ForwardSetState(SCE_F_COMMENT);
} else if (chTemp == '\r' || chTemp == '\n') {
int currentState = sc.state;
sc.SetState(SCE_F_CONTINUATION);
sc.ForwardSetState(SCE_F_DEFAULT);
while (IsASpace(sc.ch) && sc.More()) sc.Forward();
if (sc.ch == '&') {
sc.SetState(SCE_F_CONTINUATION);
sc.Forward();
}
sc.SetState(currentState);
}
}
/***************************************/
// Determine if the current state should terminate.
if (sc.state == SCE_F_OPERATOR) {
sc.SetState(SCE_F_DEFAULT);
} else if (sc.state == SCE_F_NUMBER) {
if (!(IsAWordChar(sc.ch) || sc.ch=='\'' || sc.ch=='\"' || sc.ch=='.')) {
sc.SetState(SCE_F_DEFAULT);
}
} else if (sc.state == SCE_F_IDENTIFIER) {
if (!IsAWordChar(sc.ch) || (sc.ch == '%')) {
char s[100];
sc.GetCurrentLowered(s, sizeof(s));
if (keywords.InList(s)) {
sc.ChangeState(SCE_F_WORD);
} else if (keywords2.InList(s)) {
sc.ChangeState(SCE_F_WORD2);
} else if (keywords3.InList(s)) {
sc.ChangeState(SCE_F_WORD3);
}
sc.SetState(SCE_F_DEFAULT);
}
} else if (sc.state == SCE_F_COMMENT || sc.state == SCE_F_PREPROCESSOR) {
if (sc.ch == '\r' || sc.ch == '\n') {
sc.SetState(SCE_F_DEFAULT);
}
} else if (sc.state == SCE_F_STRING1) {
prevState = sc.state;
if (sc.ch == '\'') {
if (sc.chNext == '\'') {
sc.Forward();
} else {
sc.ForwardSetState(SCE_F_DEFAULT);
prevState = SCE_F_DEFAULT;
}
} else if (sc.atLineEnd) {
sc.ChangeState(SCE_F_STRINGEOL);
sc.ForwardSetState(SCE_F_DEFAULT);
}
} else if (sc.state == SCE_F_STRING2) {
prevState = sc.state;
if (sc.atLineEnd) {
sc.ChangeState(SCE_F_STRINGEOL);
sc.ForwardSetState(SCE_F_DEFAULT);
} else if (sc.ch == '\"') {
if (sc.chNext == '\"') {
sc.Forward();
} else {
sc.ForwardSetState(SCE_F_DEFAULT);
prevState = SCE_F_DEFAULT;
}
}
} else if (sc.state == SCE_F_OPERATOR2) {
if (sc.ch == '.') {
sc.ForwardSetState(SCE_F_DEFAULT);
}
} else if (sc.state == SCE_F_CONTINUATION) {
sc.SetState(SCE_F_DEFAULT);
} else if (sc.state == SCE_F_LABEL) {
if (!IsADigit(sc.ch)) {
sc.SetState(SCE_F_DEFAULT);
} else {
if (isFixFormat && sc.currentPos-posLineStart > 4)
sc.SetState(SCE_F_DEFAULT);
else if (numNonBlank > 5)
sc.SetState(SCE_F_DEFAULT);
}
}
/***************************************/
// Determine if a new state should be entered.
if (sc.state == SCE_F_DEFAULT) {
if (sc.ch == '!') {
if (sc.MatchIgnoreCase("!dec$") || sc.MatchIgnoreCase("!dir$") ||
sc.MatchIgnoreCase("!ms$") || sc.chNext == '$') {
sc.SetState(SCE_F_PREPROCESSOR);
} else {
sc.SetState(SCE_F_COMMENT);
}
} else if ((!isFixFormat) && IsADigit(sc.ch) && numNonBlank == 1) {
sc.SetState(SCE_F_LABEL);
} else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_F_NUMBER);
} else if ((tolower(sc.ch) == 'b' || tolower(sc.ch) == 'o' ||
tolower(sc.ch) == 'z') && (sc.chNext == '\"' || sc.chNext == '\'')) {
sc.SetState(SCE_F_NUMBER);
sc.Forward();
} else if (sc.ch == '.' && isalpha(sc.chNext)) {
sc.SetState(SCE_F_OPERATOR2);
} else if (IsAWordStart(sc.ch)) {
sc.SetState(SCE_F_IDENTIFIER);
} else if (sc.ch == '\"') {
sc.SetState(SCE_F_STRING2);
} else if (sc.ch == '\'') {
sc.SetState(SCE_F_STRING1);
} else if (isoperator(static_cast<char>(sc.ch))) {
sc.SetState(SCE_F_OPERATOR);
}
}
}
sc.Complete();
}
/***************************************/
// To determine the folding level depending on keywords
static int classifyFoldPointFortran(const char* s, const char* prevWord, const char chNextNonBlank) {
int lev = 0;
if ((strcmp(prevWord, "else") == 0 && strcmp(s, "if") == 0) || strcmp(s, "elseif") == 0)
return -1;
if (strcmp(s, "associate") == 0 || strcmp(s, "block") == 0
|| strcmp(s, "blockdata") == 0 || strcmp(s, "select") == 0
|| strcmp(s, "do") == 0 || strcmp(s, "enum") ==0
|| strcmp(s, "function") == 0 || strcmp(s, "interface") == 0
|| strcmp(s, "module") == 0 || strcmp(s, "program") == 0
|| strcmp(s, "subroutine") == 0 || strcmp(s, "then") == 0
|| (strcmp(s, "type") == 0 && chNextNonBlank != '(') ){
if (strcmp(prevWord, "end") == 0)
lev = 0;
else
lev = 1;
} else if (strcmp(s, "end") == 0 && chNextNonBlank != '='
|| strcmp(s, "endassociate") == 0 || strcmp(s, "endblock") == 0
|| strcmp(s, "endblockdata") == 0 || strcmp(s, "endselect") == 0
|| strcmp(s, "enddo") == 0 || strcmp(s, "endenum") ==0
|| strcmp(s, "endif") == 0 || strcmp(s, "endforall") == 0
|| strcmp(s, "endfunction") == 0 || strcmp(s, "endinterface") == 0
|| strcmp(s, "endmodule") == 0 || strcmp(s, "endprogram") == 0
|| strcmp(s, "endsubroutine") == 0 || strcmp(s, "endtype") == 0
|| strcmp(s, "endwhere") == 0
|| strcmp(s, "procedure") == 0 ) { // Take care of the module procedure statement
lev = -1;
} else if (strcmp(prevWord, "end") == 0 && strcmp(s, "if") == 0){ // end if
lev = 0;
}
return lev;
}
// Folding the code
static void FoldFortranDoc(unsigned int startPos, int length, int initStyle,
Accessor &styler, bool isFixFormat) {
//
// bool foldComment = styler.GetPropertyInt("fold.comment") != 0;
// Do not know how to fold the comment at the moment.
//
bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
unsigned int endPos = startPos + length;
int visibleChars = 0;
int lineCurrent = styler.GetLine(startPos);
int levelPrev = styler.LevelAt(lineCurrent) & SC_FOLDLEVELNUMBERMASK;
int levelCurrent = levelPrev;
char chNext = styler[startPos];
char chNextNonBlank;
int styleNext = styler.StyleAt(startPos);
int style = initStyle;
/***************************************/
int lastStart = 0;
char prevWord[32] = "";
char Label[6] = "";
// Variables for do label folding.
static int doLabels[100];
static int posLabel=-1;
/***************************************/
for (unsigned int i = startPos; i < endPos; i++) {
char ch = chNext;
chNext = styler.SafeGetCharAt(i + 1);
chNextNonBlank = chNext;
unsigned int j=i+1;
while(IsABlank(chNextNonBlank) && j<endPos) {
j ++ ;
chNextNonBlank = styler.SafeGetCharAt(j);
}
int stylePrev = style;
style = styleNext;
styleNext = styler.StyleAt(i + 1);
bool atEOL = (ch == '\r' && chNext != '\n') || (ch == '\n');
//
if (stylePrev == SCE_F_DEFAULT && (style == SCE_F_WORD || style == SCE_F_LABEL)) {
// Store last word and label start point.
lastStart = i;
}
/***************************************/
if (style == SCE_F_WORD) {
if(iswordchar(ch) && !iswordchar(chNext)) {
char s[32];
unsigned int k;
for(k=0; (k<31 ) && (k<i-lastStart+1 ); k++) {
s[k] = static_cast<char>(tolower(styler[lastStart+k]));
}
s[k] = '\0';
// Handle the forall and where statement and structure.
if (strcmp(s, "forall") == 0 || strcmp(s, "where") == 0) {
if (strcmp(prevWord, "end") != 0) {
j = i + 1;
char chBrace = '(', chSeek = ')', ch1 = styler.SafeGetCharAt(j);
// Find the position of the first (
while (ch1 != chBrace && j<endPos) {
j++;
ch1 = styler.SafeGetCharAt(j);
}
char styBrace = styler.StyleAt(j);
int depth = 1;
char chAtPos;
char styAtPos;
while (j<endPos) {
j++;
chAtPos = styler.SafeGetCharAt(j);
styAtPos = styler.StyleAt(j);
if (styAtPos == styBrace) {
if (chAtPos == chBrace) depth++;
if (chAtPos == chSeek) depth--;
if (depth == 0) break;
}
}
while (j<endPos) {
j++;
chAtPos = styler.SafeGetCharAt(j);
styAtPos = styler.StyleAt(j);
if (styAtPos == SCE_F_COMMENT || IsABlank(chAtPos)) continue;
if (isFixFormat) {
if (!IsALineEnd(chAtPos)) {
break;
} else {
if (lineCurrent < styler.GetLine(styler.Length()-1)) {
j = styler.LineStart(lineCurrent+1);
if (styler.StyleAt(j+5) == SCE_F_CONTINUATION) {
j += 5;
continue;
} else {
levelCurrent++;
break;
}
}
}
} else {
if (chAtPos == '&' && styler.StyleAt(j) == SCE_F_CONTINUATION) {
j = GetContinuedPos(j+1, styler);
continue;
} else if (IsALineEnd(chAtPos)) {
levelCurrent ++;
break;
} else {
break;
}
}
}
}
} else {
levelCurrent += classifyFoldPointFortran(s, prevWord, chNextNonBlank);
// Store the do Labels into array
if (strcmp(s, "do") == 0 && IsADigit(chNextNonBlank)) {
unsigned int k = 0;
for (i=j; (i<j+5 && i<endPos); i++) {
ch = styler.SafeGetCharAt(i);
if (IsADigit(ch))
Label[k++] = ch;
else
break;
}
Label[k] = '\0';
posLabel ++;
doLabels[posLabel] = atoi(Label);
}
}
strcpy(prevWord, s);
}
} else if (style == SCE_F_LABEL) {
if(IsADigit(ch) && !IsADigit(chNext)) {
for(j = 0; ( j < 5 ) && ( j < i-lastStart+1 ); j++) {
ch = styler.SafeGetCharAt(lastStart + j);
if (IsADigit(ch) && styler.StyleAt(lastStart+j) == SCE_F_LABEL)
Label[j] = ch;
else
break;
}
Label[j] = '\0';
while (doLabels[posLabel] == atoi(Label) && posLabel > -1) {
levelCurrent--;
posLabel--;
}
}
}
if (atEOL) {
int lev = levelPrev;
if (visibleChars == 0 && foldCompact)
lev |= SC_FOLDLEVELWHITEFLAG;
if ((levelCurrent > levelPrev) && (visibleChars > 0))
lev |= SC_FOLDLEVELHEADERFLAG;
if (lev != styler.LevelAt(lineCurrent)) {
styler.SetLevel(lineCurrent, lev);
}
lineCurrent++;
levelPrev = levelCurrent;
visibleChars = 0;
strcpy(prevWord, "");
}
/***************************************/
if (!isspacechar(ch)) visibleChars++;
}
/***************************************/
// Fill in the real level of the next line, keeping the current flags as they will be filled in later
int flagsNext = styler.LevelAt(lineCurrent) & ~SC_FOLDLEVELNUMBERMASK;
styler.SetLevel(lineCurrent, levelPrev | flagsNext);
}
/***************************************/
static const char * const FortranWordLists[] = {
"Primary keywords and identifiers",
"Intrinsic functions",
"Extended and user defined functions",
0,
};
/***************************************/
static void ColouriseFortranDocFreeFormat(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
ColouriseFortranDoc(startPos, length, initStyle, keywordlists, styler, false);
}
/***************************************/
static void ColouriseFortranDocFixFormat(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
Accessor &styler) {
ColouriseFortranDoc(startPos, length, initStyle, keywordlists, styler, true);
}
/***************************************/
static void FoldFortranDocFreeFormat(unsigned int startPos, int length, int initStyle,
WordList *[], Accessor &styler) {
FoldFortranDoc(startPos, length, initStyle,styler, false);
}
/***************************************/
static void FoldFortranDocFixFormat(unsigned int startPos, int length, int initStyle,
WordList *[], Accessor &styler) {
FoldFortranDoc(startPos, length, initStyle,styler, true);
}
/***************************************/
LexerModule lmFortran(SCLEX_FORTRAN, ColouriseFortranDocFreeFormat, "fortran", FoldFortranDocFreeFormat, FortranWordLists);
LexerModule lmF77(SCLEX_F77, ColouriseFortranDocFixFormat, "f77", FoldFortranDocFixFormat, FortranWordLists);
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