src/stc/scintilla/lexers/LexAPDL.cxx

   1 // Scintilla source code edit control
   2 /** @file LexAPDL.cxx
   3  ** Lexer for APDL. Based on the lexer for Assembler by The Black Horus.
   4  ** By Hadar Raz.
   5  **/
   6 // Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
   7 // The License.txt file describes the conditions under which this software may be distributed.
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <stdio.h>
  12 #include <stdarg.h>
  13 #include <assert.h>
  14 #include <ctype.h>
  15
  16 #include "ILexer.h"
  17 #include "Scintilla.h"
  18 #include "SciLexer.h"
  19
  20 #include "WordList.h"
  21 #include "LexAccessor.h"
  22 #include "Accessor.h"
  23 #include "StyleContext.h"
  24 #include "CharacterSet.h"
  25 #include "LexerModule.h"
  26
  27 #ifdef SCI_NAMESPACE
  28 using namespace Scintilla;
  29 #endif
  30
  31 static inline bool IsAWordChar(const int ch) {
  32         return (ch < 0x80 && (isalnum(ch) || ch == '_'));
  33 }
  34
  35 static inline bool IsAnOperator(char ch) {
  36         // '.' left out as it is used to make up numbers
  37         if (ch == '*' || ch == '/' || ch == '-' || ch == '+' ||
  38                 ch == '(' || ch == ')' || ch == '=' || ch == '^' ||
  39                 ch == '[' || ch == ']' || ch == '<' || ch == '&' ||
  40                 ch == '>' || ch == ',' || ch == '|' || ch == '~' ||
  41                 ch == '$' || ch == ':' || ch == '%')
  42                 return true;
  43         return false;
  44 }
  45
  46 static void ColouriseAPDLDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[],
  47                             Accessor &styler) {
  48
  49         int stringStart = ' ';
  50
  51         WordList &processors = *keywordlists[0];
  52         WordList &commands = *keywordlists[1];
  53         WordList &slashcommands = *keywordlists[2];
  54         WordList &starcommands = *keywordlists[3];
  55         WordList &arguments = *keywordlists[4];
  56         WordList &functions = *keywordlists[5];
  57
  58         // Do not leak onto next line
  59         initStyle = SCE_APDL_DEFAULT;
  60         StyleContext sc(startPos, length, initStyle, styler);
  61
  62         for (; sc.More(); sc.Forward()) {
  63                 // Determine if the current state should terminate.
  64                 if (sc.state == SCE_APDL_NUMBER) {
  65                         if (!(IsADigit(sc.ch) || sc.ch == '.' || (sc.ch == 'e' || sc.ch == 'E') ||
  66                                 ((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E')))) {
  67                                 sc.SetState(SCE_APDL_DEFAULT);
  68                         }
  69                 } else if (sc.state == SCE_APDL_COMMENT) {
  70                         if (sc.atLineEnd) {
  71                                 sc.SetState(SCE_APDL_DEFAULT);
  72                         }
  73                 } else if (sc.state == SCE_APDL_COMMENTBLOCK) {
  74                         if (sc.atLineEnd) {
  75                                 if (sc.ch == '\r') {
  76                                 sc.Forward();
  77                                 }
  78                                 sc.ForwardSetState(SCE_APDL_DEFAULT);
  79                         }
  80                 } else if (sc.state == SCE_APDL_STRING) {
  81                         if (sc.atLineEnd) {
  82                                 sc.SetState(SCE_APDL_DEFAULT);
  83                         } else if ((sc.ch == '\'' && stringStart == '\'') || (sc.ch == '\"' && stringStart == '\"')) {
  84                                 sc.ForwardSetState(SCE_APDL_DEFAULT);
  85                         }
  86                 } else if (sc.state == SCE_APDL_WORD) {
  87                         if (!IsAWordChar(sc.ch)) {
  88                                 char s[100];
  89                                 sc.GetCurrentLowered(s, sizeof(s));
  90                                 if (processors.InList(s)) {
  91                                         sc.ChangeState(SCE_APDL_PROCESSOR);
  92                                 } else if (slashcommands.InList(s)) {
  93                                         sc.ChangeState(SCE_APDL_SLASHCOMMAND);
  94                                 } else if (starcommands.InList(s)) {
  95                                         sc.ChangeState(SCE_APDL_STARCOMMAND);
  96                                 } else if (commands.InList(s)) {
  97                                         sc.ChangeState(SCE_APDL_COMMAND);
  98                                 } else if (arguments.InList(s)) {
  99                                         sc.ChangeState(SCE_APDL_ARGUMENT);
 100                                 } else if (functions.InList(s)) {
 101                                         sc.ChangeState(SCE_APDL_FUNCTION);
 102                                 }
 103                                 sc.SetState(SCE_APDL_DEFAULT);
 104                         }
 105                 } else if (sc.state == SCE_APDL_OPERATOR) {
 106                         if (!IsAnOperator(static_cast<char>(sc.ch))) {
 107                             sc.SetState(SCE_APDL_DEFAULT);
 108                         }
 109                 }
 110
 111                 // Determine if a new state should be entered.
 112                 if (sc.state == SCE_APDL_DEFAULT) {
 113                         if (sc.ch == '!' && sc.chNext == '!') {
 114                                 sc.SetState(SCE_APDL_COMMENTBLOCK);
 115                         } else if (sc.ch == '!') {
 116                                 sc.SetState(SCE_APDL_COMMENT);
 117                         } else if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
 118                                 sc.SetState(SCE_APDL_NUMBER);
 119                         } else if (sc.ch == '\'' || sc.ch == '\"') {
 120                                 sc.SetState(SCE_APDL_STRING);
 121                                 stringStart = sc.ch;
 122                         } else if (IsAWordChar(sc.ch) || ((sc.ch == '*' || sc.ch == '/') && !isgraph(sc.chPrev))) {
 123                                 sc.SetState(SCE_APDL_WORD);
 124                         } else if (IsAnOperator(static_cast<char>(sc.ch))) {
 125                                 sc.SetState(SCE_APDL_OPERATOR);
 126                         }
 127                 }
 128         }
 129         sc.Complete();
 130 }
 131
 132 //------------------------------------------------------------------------------
 133 // 06-27-07 Sergio Lucato
 134 // - Included code folding for Ansys APDL lexer
 135 // - Copyied from LexBasic.cxx and modified for APDL
 136 //------------------------------------------------------------------------------
 137
 138 /* Bits:
 139  * 1  - whitespace
 140  * 2  - operator
 141  * 4  - identifier
 142  * 8  - decimal digit
 143  * 16 - hex digit
 144  * 32 - bin digit
 145  */
 146 static int character_classification[128] =
 147 {
 148     0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  0,  0,  1,  0,  0,
 149     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
 150     1,  2,  0,  2,  2,  2,  2,  2,  2,  2,  6,  2,  2,  2,  10, 6,
 151     60, 60, 28, 28, 28, 28, 28, 28, 28, 28, 2,  2,  2,  2,  2,  2,
 152     2,  20, 20, 20, 20, 20, 20, 4,  4,  4,  4,  4,  4,  4,  4,  4,
 153     4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  2,  4,
 154     2,  20, 20, 20, 20, 20, 20, 4,  4,  4,  4,  4,  4,  4,  4,  4,
 155     4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  2,  2,  2,  2,  0
 156 };
 157
 158 static bool IsSpace(int c) {
 159         return c < 128 && (character_classification[c] & 1);
 160 }
 161
 162 static bool IsIdentifier(int c) {
 163         return c < 128 && (character_classification[c] & 4);
 164 }
 165
 166 static int LowerCase(int c)
 167 {
 168         if (c >= 'A' && c <= 'Z')
 169                 return 'a' + c - 'A';
 170         return c;
 171 }
 172
 173 static int CheckAPDLFoldPoint(char const *token, int &level) {
 174         if (!strcmp(token, "*if") ||
 175                 !strcmp(token, "*do") ||
 176                 !strcmp(token, "*dowhile") ) {
 177                 level |= SC_FOLDLEVELHEADERFLAG;
 178                 return 1;
 179         }
 180         if (!strcmp(token, "*endif") ||
 181                 !strcmp(token, "*enddo") ) {
 182                 return -1;
 183         }
 184         return 0;
 185 }
 186
 187 static void FoldAPDLDoc(unsigned int startPos, int length, int,
 188         WordList *[], Accessor &styler) {
 189
 190         int line = styler.GetLine(startPos);
 191         int level = styler.LevelAt(line);
 192         int go = 0, done = 0;
 193         int endPos = startPos + length;
 194         char word[256];
 195         int wordlen = 0;
 196         int i;
 197     bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
 198         // Scan for tokens at the start of the line (they may include
 199         // whitespace, for tokens like "End Function"
 200         for (i = startPos; i < endPos; i++) {
 201                 int c = styler.SafeGetCharAt(i);
 202                 if (!done && !go) {
 203                         if (wordlen) { // are we scanning a token already?
 204                                 word[wordlen] = static_cast<char>(LowerCase(c));
 205                                 if (!IsIdentifier(c)) { // done with token
 206                                         word[wordlen] = '\0';
 207                                         go = CheckAPDLFoldPoint(word, level);
 208                                         if (!go) {
 209                                                 // Treat any whitespace as single blank, for
 210                                                 // things like "End   Function".
 211                                                 if (IsSpace(c) && IsIdentifier(word[wordlen - 1])) {
 212                                                         word[wordlen] = ' ';
 213                                                         if (wordlen < 255)
 214                                                                 wordlen++;
 215                                                 }
 216                                                 else // done with this line
 217                                                         done = 1;
 218                                         }
 219                                 } else if (wordlen < 255) {
 220                                         wordlen++;
 221                                 }
 222                         } else { // start scanning at first non-whitespace character
 223                                 if (!IsSpace(c)) {
 224                                         if (IsIdentifier(c)) {
 225                                                 word[0] = static_cast<char>(LowerCase(c));
 226                                                 wordlen = 1;
 227                                         } else // done with this line
 228                                                 done = 1;
 229                                 }
 230                         }
 231                 }
 232                 if (c == '\n') { // line end
 233                         if (!done && wordlen == 0 && foldCompact) // line was only space
 234                                 level |= SC_FOLDLEVELWHITEFLAG;
 235                         if (level != styler.LevelAt(line))
 236                                 styler.SetLevel(line, level);
 237                         level += go;
 238                         line++;
 239                         // reset state
 240                         wordlen = 0;
 241                         level &= ~SC_FOLDLEVELHEADERFLAG;
 242                         level &= ~SC_FOLDLEVELWHITEFLAG;
 243                         go = 0;
 244                         done = 0;
 245                 }
 246         }
 247 }
 248
 249 static const char * const apdlWordListDesc[] = {
 250     "processors",
 251     "commands",
 252     "slashommands",
 253     "starcommands",
 254     "arguments",
 255     "functions",
 256     0
 257 };
 258
 259 LexerModule lmAPDL(SCLEX_APDL, ColouriseAPDLDoc, "apdl", FoldAPDLDoc, apdlWordListDesc);