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