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Diffstat (limited to 'src')
| -rw-r--r-- | src/LexMMIXAL.cxx | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/LexMMIXAL.cxx b/src/LexMMIXAL.cxx new file mode 100644 index 000000000..f44789989 --- /dev/null +++ b/src/LexMMIXAL.cxx @@ -0,0 +1,183 @@ +// Scintilla source code edit control +/** @file LexMMIXAL.cxx + ** Lexer for MMIX Assembler Language. + ** Written by Christoph Hösler <christoph.hoesler@student.uni-tuebingen.de> + ** For information about MMIX visit http://www-cs-faculty.stanford.edu/~knuth/mmix.html + **/ +// Copyright 1998-2003 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 == '_'); +} + +inline bool isMMIXALOperator(char ch) { + if (isalnum(ch)) + return false; + if (ch == '+' || ch == '-' || ch == '|' || ch == '^' || + ch == '*' || ch == '/' || ch == '/' || + ch == '%' || ch == '<' || ch == '>' || ch == '&' || + ch == '~' || ch == '$' || + ch == ',' || ch == '(' || ch == ')' || + ch == '[' || ch == ']') + return true; + return false; +} + +static void ColouriseMMIXALDoc(unsigned int startPos, int length, int initStyle, WordList *keywordlists[], + Accessor &styler) { + + WordList &opcodes = *keywordlists[0]; + WordList &special_register = *keywordlists[1]; + WordList &predef_symbols = *keywordlists[2]; + + StyleContext sc(startPos, length, initStyle, styler); + + for (; sc.More(); sc.Forward()) + { + // No EOL continuation + if (sc.atLineStart) { + if (sc.ch == '@' && sc.chNext == 'i') { + sc.SetState(SCE_MMIXAL_INCLUDE); + } else { + sc.SetState(SCE_MMIXAL_LEADWS); + } + } + + // Check if first non whitespace character in line is alphanumeric + if (sc.state == SCE_MMIXAL_LEADWS && !isspace(sc.ch)) { // LEADWS + if(!IsAWordChar(sc.ch)) { + sc.SetState(SCE_MMIXAL_COMMENT); + } else { + if(sc.atLineStart) { + sc.SetState(SCE_MMIXAL_LABEL); + } else { + sc.SetState(SCE_MMIXAL_OPCODE_PRE); + } + } + } + + // Determine if the current state should terminate. + if (sc.state == SCE_MMIXAL_OPERATOR) { // OPERATOR + sc.SetState(SCE_MMIXAL_OPERANDS); + } else if (sc.state == SCE_MMIXAL_NUMBER) { // NUMBER + if (!isdigit(sc.ch)) { + if (IsAWordChar(sc.ch)) { + char s[100]; + sc.GetCurrent(s, sizeof(s)); + sc.ChangeState(SCE_MMIXAL_REF); + sc.SetState(SCE_MMIXAL_REF); + } else { + sc.SetState(SCE_MMIXAL_OPERANDS); + } + } + } else if (sc.state == SCE_MMIXAL_LABEL) { // LABEL + if (!IsAWordChar(sc.ch) ) { + sc.SetState(SCE_MMIXAL_OPCODE_PRE); + } + } else if (sc.state == SCE_MMIXAL_REF) { // REF + if (!IsAWordChar(sc.ch) ) { + char s[100]; + sc.GetCurrent(s, sizeof(s)); + if (*s == ':') { // ignore base prefix for match + for (size_t i = 0; i != sizeof(s); ++i) { + *(s+i) = *(s+i+1); + } + } + if (special_register.InList(s)) { + sc.ChangeState(SCE_MMIXAL_REGISTER); + } else if (predef_symbols.InList(s)) { + sc.ChangeState(SCE_MMIXAL_SYMBOL); + } + sc.SetState(SCE_MMIXAL_OPERANDS); + } + } else if (sc.state == SCE_MMIXAL_OPCODE_PRE) { // OPCODE_PRE + if (!isspace(sc.ch)) { + sc.SetState(SCE_MMIXAL_OPCODE); + } + } else if (sc.state == SCE_MMIXAL_OPCODE) { // OPCODE + if (!IsAWordChar(sc.ch) ) { + char s[100]; + sc.GetCurrent(s, sizeof(s)); + if (opcodes.InList(s)) { + sc.ChangeState(SCE_MMIXAL_OPCODE_VALID); + } else { + sc.ChangeState(SCE_MMIXAL_OPCODE_UNKNOWN); + } + sc.SetState(SCE_MMIXAL_OPCODE_POST); + } + } else if (sc.state == SCE_MMIXAL_STRING) { // STRING + if (sc.ch == '\"') { + sc.ForwardSetState(SCE_MMIXAL_OPERANDS); + } else if (sc.atLineEnd) { + sc.ForwardSetState(SCE_MMIXAL_OPERANDS); + } + } else if (sc.state == SCE_MMIXAL_CHAR) { // CHAR + if (sc.ch == '\'') { + sc.ForwardSetState(SCE_MMIXAL_OPERANDS); + } else if (sc.atLineEnd) { + sc.ForwardSetState(SCE_MMIXAL_OPERANDS); + } + } else if (sc.state == SCE_MMIXAL_REGISTER) { // REGISTER + if (!isdigit(sc.ch)) { + sc.SetState(SCE_MMIXAL_OPERANDS); + } + } else if (sc.state == SCE_MMIXAL_HEX) { // HEX + if (!isxdigit(sc.ch)) { + sc.SetState(SCE_MMIXAL_OPERANDS); + } + } + + // Determine if a new state should be entered. + if (sc.state == SCE_MMIXAL_OPCODE_POST || // OPCODE_POST + sc.state == SCE_MMIXAL_OPERANDS) { // OPERANDS + if (sc.state == SCE_MMIXAL_OPERANDS && isspace(sc.ch)) { + if (!sc.atLineEnd) { + sc.SetState(SCE_MMIXAL_COMMENT); + } + } else if (isdigit(sc.ch)) { + sc.SetState(SCE_MMIXAL_NUMBER); + } else if (IsAWordChar(sc.ch) || sc.Match('@')) { + sc.SetState(SCE_MMIXAL_REF); + } else if (sc.Match('\"')) { + sc.SetState(SCE_MMIXAL_STRING); + } else if (sc.Match('\'')) { + sc.SetState(SCE_MMIXAL_CHAR); + } else if (sc.Match('$')) { + sc.SetState(SCE_MMIXAL_REGISTER); + } else if (sc.Match('#')) { + sc.SetState(SCE_MMIXAL_HEX); + } else if (isMMIXALOperator(static_cast<char>(sc.ch))) { + sc.SetState(SCE_MMIXAL_OPERATOR); + } + } + } + sc.Complete(); +} + +static const char * const MMIXALWordListDesc[] = { + "Operation Codes", + "Special Register", + "Predefined Symbols", + 0 +}; + +LexerModule lmMMIXAL(SCLEX_MMIXAL, ColouriseMMIXALDoc, "mmixal", 0, MMIXALWordListDesc); + |