Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: 68a66a4ab3
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 374 lines (334 sloc) 11.002 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373
// Scintilla source code edit control
/** @file LexBasic.cxx
** Lexer for BlitzBasic and PureBasic.
**/
// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

// This tries to be a unified Lexer/Folder for all the BlitzBasic/BlitzMax/PurBasic basics
// and derivatives. Once they diverge enough, might want to split it into multiple
// lexers for more code clearity.
//
// Mail me (elias <at> users <dot> sf <dot> net) for any bugs.

// Folding only works for simple things like functions or types.

// You may want to have a look at my ctags lexer as well, if you additionally to coloring
// and folding need to extract things like label tags in your editor.

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <ctype.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

/* Bits:
* 1 - whitespace
* 2 - operator
* 4 - identifier
* 8 - decimal digit
* 16 - hex digit
* 32 - bin digit
*/
static int character_classification[128] =
{
    0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    1, 2, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 10, 2,
    60, 60, 28, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 2, 2, 2,
    2, 20, 20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4,
    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 4,
    2, 20, 20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4,
    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 0
};

static bool IsSpace(int c) {
return c < 128 && (character_classification[c] & 1);
}

static bool IsOperator(int c) {
return c < 128 && (character_classification[c] & 2);
}

static bool IsIdentifier(int c) {
return c < 128 && (character_classification[c] & 4);
}

static bool IsDigit(int c) {
return c < 128 && (character_classification[c] & 8);
}

static bool IsHexDigit(int c) {
return c < 128 && (character_classification[c] & 16);
}

static bool IsBinDigit(int c) {
return c < 128 && (character_classification[c] & 32);
}

static int LowerCase(int c)
{
if (c >= 'A' && c <= 'Z')
return 'a' + c - 'A';
return c;
}

static void ColouriseBasicDoc(unsigned int startPos, int length, int initStyle,
                           WordList *keywordlists[], Accessor &styler, char comment_char) {
bool wasfirst = true, isfirst = true; // true if first token in a line
styler.StartAt(startPos);

StyleContext sc(startPos, length, initStyle, styler);

// Can't use sc.More() here else we miss the last character
for (; ; sc.Forward()) {
if (sc.state == SCE_B_IDENTIFIER) {
if (!IsIdentifier(sc.ch)) {
// Labels
if (wasfirst && sc.Match(':')) {
sc.ChangeState(SCE_B_LABEL);
sc.ForwardSetState(SCE_B_DEFAULT);
} else {
char s[100];
int kstates[4] = {
SCE_B_KEYWORD,
SCE_B_KEYWORD2,
SCE_B_KEYWORD3,
SCE_B_KEYWORD4,
};
sc.GetCurrentLowered(s, sizeof(s));
for (int i = 0; i < 4; i++) {
if (keywordlists[i]->InList(s)) {
sc.ChangeState(kstates[i]);
}
}
// Types, must set them as operator else they will be
// matched as number/constant
if (sc.Match('.') || sc.Match('$') || sc.Match('%') ||
sc.Match('#')) {
sc.SetState(SCE_B_OPERATOR);
} else {
sc.SetState(SCE_B_DEFAULT);
}
}
}
} else if (sc.state == SCE_B_OPERATOR) {
if (!IsOperator(sc.ch) || sc.Match('#'))
sc.SetState(SCE_B_DEFAULT);
} else if (sc.state == SCE_B_LABEL) {
if (!IsIdentifier(sc.ch))
sc.SetState(SCE_B_DEFAULT);
} else if (sc.state == SCE_B_CONSTANT) {
if (!IsIdentifier(sc.ch))
sc.SetState(SCE_B_DEFAULT);
} else if (sc.state == SCE_B_NUMBER) {
if (!IsDigit(sc.ch))
sc.SetState(SCE_B_DEFAULT);
} else if (sc.state == SCE_B_HEXNUMBER) {
if (!IsHexDigit(sc.ch))
sc.SetState(SCE_B_DEFAULT);
} else if (sc.state == SCE_B_BINNUMBER) {
if (!IsBinDigit(sc.ch))
sc.SetState(SCE_B_DEFAULT);
} else if (sc.state == SCE_B_STRING) {
if (sc.ch == '"') {
sc.ForwardSetState(SCE_B_DEFAULT);
}
if (sc.atLineEnd) {
sc.ChangeState(SCE_B_ERROR);
sc.SetState(SCE_B_DEFAULT);
}
} else if (sc.state == SCE_B_COMMENT || sc.state == SCE_B_PREPROCESSOR) {
if (sc.atLineEnd) {
sc.SetState(SCE_B_DEFAULT);
}
}

if (sc.atLineStart)
isfirst = true;

if (sc.state == SCE_B_DEFAULT || sc.state == SCE_B_ERROR) {
if (isfirst && sc.Match('.')) {
sc.SetState(SCE_B_LABEL);
} else if (isfirst && sc.Match('#')) {
wasfirst = isfirst;
sc.SetState(SCE_B_IDENTIFIER);
} else if (sc.Match(comment_char)) {
// Hack to make deprecated QBASIC '$Include show
// up in freebasic with SCE_B_PREPROCESSOR.
if (comment_char == '\'' && sc.Match(comment_char, '$'))
sc.SetState(SCE_B_PREPROCESSOR);
else
sc.SetState(SCE_B_COMMENT);
} else if (sc.Match('"')) {
sc.SetState(SCE_B_STRING);
} else if (IsDigit(sc.ch)) {
sc.SetState(SCE_B_NUMBER);
} else if (sc.Match('$')) {
sc.SetState(SCE_B_HEXNUMBER);
} else if (sc.Match('%')) {
sc.SetState(SCE_B_BINNUMBER);
} else if (sc.Match('#')) {
sc.SetState(SCE_B_CONSTANT);
} else if (IsOperator(sc.ch)) {
sc.SetState(SCE_B_OPERATOR);
} else if (IsIdentifier(sc.ch)) {
wasfirst = isfirst;
sc.SetState(SCE_B_IDENTIFIER);
} else if (!IsSpace(sc.ch)) {
sc.SetState(SCE_B_ERROR);
}
}

if (!IsSpace(sc.ch))
isfirst = false;

if (!sc.More())
break;
}
sc.Complete();
}

static int CheckBlitzFoldPoint(char const *token, int &level) {
if (!strcmp(token, "function") ||
!strcmp(token, "type")) {
level |= SC_FOLDLEVELHEADERFLAG;
return 1;
}
if (!strcmp(token, "end function") ||
!strcmp(token, "end type")) {
return -1;
}
return 0;
}

static int CheckPureFoldPoint(char const *token, int &level) {
if (!strcmp(token, "procedure") ||
!strcmp(token, "enumeration") ||
!strcmp(token, "interface") ||
!strcmp(token, "structure")) {
level |= SC_FOLDLEVELHEADERFLAG;
return 1;
}
if (!strcmp(token, "endprocedure") ||
!strcmp(token, "endenumeration") ||
!strcmp(token, "endinterface") ||
!strcmp(token, "endstructure")) {
return -1;
}
return 0;
}

static int CheckFreeFoldPoint(char const *token, int &level) {
if (!strcmp(token, "function") ||
!strcmp(token, "sub") ||
!strcmp(token, "type")) {
level |= SC_FOLDLEVELHEADERFLAG;
return 1;
}
if (!strcmp(token, "end function") ||
!strcmp(token, "end sub") ||
!strcmp(token, "end type")) {
return -1;
}
return 0;
}

static void FoldBasicDoc(unsigned int startPos, int length,
Accessor &styler, int (*CheckFoldPoint)(char const *, int &)) {
int line = styler.GetLine(startPos);
int level = styler.LevelAt(line);
int go = 0, done = 0;
int endPos = startPos + length;
char word[256];
int wordlen = 0;
int i;
        bool foldCompact = styler.GetPropertyInt("fold.compact", 1) != 0;
// Scan for tokens at the start of the line (they may include
// whitespace, for tokens like "End Function"
for (i = startPos; i < endPos; i++) {
int c = styler.SafeGetCharAt(i);
if (!done && !go) {
if (wordlen) { // are we scanning a token already?
word[wordlen] = static_cast<char>(LowerCase(c));
if (!IsIdentifier(c)) { // done with token
word[wordlen] = '\0';
go = CheckFoldPoint(word, level);
if (!go) {
// Treat any whitespace as single blank, for
// things like "End Function".
if (IsSpace(c) && IsIdentifier(word[wordlen - 1])) {
word[wordlen] = ' ';
if (wordlen < 255)
wordlen++;
}
else // done with this line
done = 1;
}
} else if (wordlen < 255) {
wordlen++;
}
} else { // start scanning at first non-whitespace character
if (!IsSpace(c)) {
if (IsIdentifier(c)) {
word[0] = static_cast<char>(LowerCase(c));
wordlen = 1;
} else // done with this line
done = 1;
}
}
}
if (c == '\n') { // line end
if (!done && wordlen == 0 && foldCompact) // line was only space
level |= SC_FOLDLEVELWHITEFLAG;
if (level != styler.LevelAt(line))
styler.SetLevel(line, level);
level += go;
line++;
// reset state
wordlen = 0;
level &= ~SC_FOLDLEVELHEADERFLAG;
level &= ~SC_FOLDLEVELWHITEFLAG;
go = 0;
done = 0;
}
}
}

static void ColouriseBlitzBasicDoc(unsigned int startPos, int length, int initStyle,
                           WordList *keywordlists[], Accessor &styler) {
ColouriseBasicDoc(startPos, length, initStyle, keywordlists, styler, ';');
}

static void ColourisePureBasicDoc(unsigned int startPos, int length, int initStyle,
                           WordList *keywordlists[], Accessor &styler) {
ColouriseBasicDoc(startPos, length, initStyle, keywordlists, styler, ';');
}

static void ColouriseFreeBasicDoc(unsigned int startPos, int length, int initStyle,
                           WordList *keywordlists[], Accessor &styler) {
ColouriseBasicDoc(startPos, length, initStyle, keywordlists, styler, '\'');
}

static void FoldBlitzBasicDoc(unsigned int startPos, int length, int,
WordList *[], Accessor &styler) {
FoldBasicDoc(startPos, length, styler, CheckBlitzFoldPoint);
}

static void FoldPureBasicDoc(unsigned int startPos, int length, int,
WordList *[], Accessor &styler) {
FoldBasicDoc(startPos, length, styler, CheckPureFoldPoint);
}

static void FoldFreeBasicDoc(unsigned int startPos, int length, int,
WordList *[], Accessor &styler) {
FoldBasicDoc(startPos, length, styler, CheckFreeFoldPoint);
}

static const char * const blitzbasicWordListDesc[] = {
"BlitzBasic Keywords",
"user1",
"user2",
"user3",
0
};

static const char * const purebasicWordListDesc[] = {
"PureBasic Keywords",
"PureBasic PreProcessor Keywords",
"user defined 1",
"user defined 2",
0
};

static const char * const freebasicWordListDesc[] = {
"FreeBasic Keywords",
"FreeBasic PreProcessor Keywords",
"user defined 1",
"user defined 2",
0
};

LexerModule lmBlitzBasic(SCLEX_BLITZBASIC, ColouriseBlitzBasicDoc, "blitzbasic",
FoldBlitzBasicDoc, blitzbasicWordListDesc);

LexerModule lmPureBasic(SCLEX_PUREBASIC, ColourisePureBasicDoc, "purebasic",
FoldPureBasicDoc, purebasicWordListDesc);

LexerModule lmFreeBasic(SCLEX_FREEBASIC, ColouriseFreeBasicDoc, "freebasic",
FoldFreeBasicDoc, freebasicWordListDesc);

Something went wrong with that request. Please try again.