summaryrefslogtreecommitdiffstats
path: root/src/LexFortran.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/LexFortran.cpp')
-rwxr-xr-xsrc/LexFortran.cpp452
1 files changed, 452 insertions, 0 deletions
diff --git a/src/LexFortran.cpp b/src/LexFortran.cpp
new file mode 100755
index 0000000..3ab1116
--- /dev/null
+++ b/src/LexFortran.cpp
@@ -0,0 +1,452 @@
+// 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"
+/***********************************************/
+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 == '!') {
+ 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.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);
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-22 15:45:13 +0000