mirror of
https://github.com/ksherlock/mpw.git
synced 2024-11-27 02:49:31 +00:00
436 lines
8.8 KiB
Ragel
436 lines
8.8 KiB
Ragel
/*
|
|
* Copyright (c) 2013, Kelvin W Sherlock
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
|
|
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#include <string>
|
|
#include <algorithm>
|
|
#include <numeric>
|
|
#include <memory>
|
|
#include <deque>
|
|
|
|
#include <cstdint>
|
|
#include <cstring>
|
|
#include <stdlib.h>
|
|
|
|
#include "debugger.h"
|
|
#include "parser.h"
|
|
|
|
|
|
void *ParseAlloc(void *(*mallocProc)(size_t));
|
|
void ParseFree(void *p, void (*freeProc)(void*));
|
|
void Parse(void *yyp, int yymajor, Debug::Token yyminor, Debug::Command *command);
|
|
void ParseTrace(FILE *TraceFILE, char *zTracePrompt);
|
|
|
|
|
|
// for the common case....
|
|
void Parse(void *yyp, int yymajor, uint32_t yyminor, Debug::Command *command)
|
|
{
|
|
Parse(yyp, yymajor, Debug::Token::Make(yyminor), command);
|
|
}
|
|
|
|
|
|
namespace {
|
|
|
|
int tox(char c)
|
|
{
|
|
c |= 0x20; // lowercase it.
|
|
if (c >= '0' && c <= '9') return c - '0';
|
|
if (c >= 'a' && c <= 'f') return c - 'a' + 10;
|
|
return 0;
|
|
}
|
|
|
|
uint32_t scan10(const char *begin, const char *end)
|
|
{
|
|
return std::accumulate(begin, end, 0,
|
|
[](uint32_t value, char c){
|
|
return value * 10 + c - '0';
|
|
});
|
|
}
|
|
|
|
uint32_t scan16(const char *begin, const char *end)
|
|
{
|
|
return std::accumulate(begin, end, 0,
|
|
[](uint32_t value, char c){
|
|
return (value << 4) + tox(c);
|
|
});
|
|
}
|
|
|
|
uint32_t scan2(const char *begin, const char *end)
|
|
{
|
|
return std::accumulate(begin, end, 0,
|
|
[](uint32_t value, char c){
|
|
return (value << 1) + (c & 0x01);
|
|
});
|
|
}
|
|
|
|
uint32_t scancc(const char *begin, const char *end)
|
|
{
|
|
return std::accumulate(begin, end, 0,
|
|
[](uint32_t value, char c)
|
|
{
|
|
return (value << 8) + (unsigned)c;
|
|
}
|
|
);
|
|
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
%%{
|
|
machine lexer;
|
|
|
|
# this exits with cs == lexer_en_error.
|
|
error := any* ${ fbreak; };
|
|
|
|
# identifiers.
|
|
ident := |*
|
|
|
|
[ \t\r\n]+;
|
|
|
|
[_A-Za-z][_A-Za-z0-9]* {
|
|
|
|
std::unique_ptr<std::string> sp(new std::string(ts, te));
|
|
|
|
Parse(parser, tkIDENTIFIER, Token::Make(sp.get(), 0), command);
|
|
Strings.push_back(std::move(sp));
|
|
};
|
|
|
|
*|;
|
|
|
|
# semi-colon commands.
|
|
semi := |*
|
|
|
|
[ \t\r\n]+;
|
|
|
|
'h'i | 'hd'i | 'hexdump'i {
|
|
Parse(parser, tkSEMIH, 0, command);
|
|
};
|
|
|
|
'i'i | 'info'i {
|
|
Parse(parser, tkSEMII, 0, command);
|
|
};
|
|
|
|
'l'i | 'list'i {
|
|
Parse(parser, tkSEMIL, 0, command);
|
|
};
|
|
|
|
'date'i {
|
|
Parse(parser, tkSEMIDATE, 0, command);
|
|
};
|
|
|
|
'error'i {
|
|
Parse(parser, tkSEMIERROR, 0, command);
|
|
};
|
|
|
|
't'i {
|
|
Parse(parser, tkSEMIT, 0, command);
|
|
fgoto ident;
|
|
};
|
|
|
|
|
|
*|;
|
|
|
|
main := |*
|
|
|
|
[ \t\r\n]+;
|
|
|
|
'>=' { Parse(parser, tkGTEQ, 0, command); };
|
|
'>>' { Parse(parser, tkGTGT, 0, command); };
|
|
'<=' { Parse(parser, tkLTEQ, 0, command); };
|
|
'<<' { Parse(parser, tkLTLT, 0, command); };
|
|
'!=' { Parse(parser, tkBANGEQ, 0, command); };
|
|
'==' { Parse(parser, tkEQEQ, 0, command); };
|
|
'||' { Parse(parser, tkPIPEPIPE, 0, command); };
|
|
'&&' { Parse(parser, tkAMPAMP, 0, command); };
|
|
|
|
|
|
'(' { Parse(parser, tkLPAREN, 0, command); };
|
|
')' { Parse(parser, tkRPAREN, 0, command); };
|
|
'=' { Parse(parser, tkEQ, 0, command); };
|
|
'+' { Parse(parser, tkPLUS, 0, command); };
|
|
'-' { Parse(parser, tkMINUS, 0, command); };
|
|
'*' { Parse(parser, tkSTAR, 0, command); };
|
|
'/' { Parse(parser, tkSLASH, 0, command); };
|
|
'%' { Parse(parser, tkPERCENT, 0, command); };
|
|
'~' { Parse(parser, tkTILDE, 0, command); };
|
|
'!' { Parse(parser, tkBANG, 0, command); };
|
|
'^' { Parse(parser, tkCARET, 0, command); };
|
|
'&' { Parse(parser, tkAMP, 0, command); };
|
|
'|' { Parse(parser, tkPIPE, 0, command); };
|
|
'<' { Parse(parser, tkLT, 0, command); };
|
|
'>' { Parse(parser, tkGT, 0, command); };
|
|
|
|
':' { Parse(parser, tkCOLON, 0, command); };
|
|
|
|
'@' { Parse(parser, tkAT, 0, command); };
|
|
|
|
';' {
|
|
Parse(parser, tkSEMI, 0, command);
|
|
fgoto semi;
|
|
};
|
|
|
|
|
|
'$' xdigit + {
|
|
uint32_t value = scan16(ts + 1, te);
|
|
Parse(parser, tkINTEGER, value, command);
|
|
};
|
|
|
|
'0x'i xdigit+ {
|
|
// hexadecimal
|
|
uint32_t value = scan16(ts + 2, te);
|
|
Parse(parser, tkINTEGER, value, command);
|
|
};
|
|
|
|
'0b'i [01]+ {
|
|
// binary
|
|
uint32_t value = scan2(ts + 2, te);
|
|
Parse(parser, tkINTEGER, value, command);
|
|
};
|
|
|
|
digit+ {
|
|
uint32_t value = scan10(ts, te);
|
|
Parse(parser, tkINTEGER, value, command);
|
|
};
|
|
|
|
# todo -- (\['\]|[^'\]){1,4} ?
|
|
['] [^']{1,4} ['] {
|
|
// 4 cc code
|
|
|
|
uint32_t value = scancc(ts + 1, te - 1);
|
|
Parse(parser, tkINTEGER, value, command);
|
|
|
|
};
|
|
|
|
'd'i [0-7] {
|
|
// data register
|
|
uint32_t data = ts[1] - '0';
|
|
Parse(parser, tkDREGISTER, data, command);
|
|
};
|
|
|
|
'a'i [0-7] {
|
|
// address register
|
|
uint32_t data = ts[1] - '0';
|
|
Parse(parser, tkAREGISTER, data, command);
|
|
};
|
|
|
|
'pc'i {
|
|
// program counter...
|
|
Parse(parser, tkXREGISTER, 0, command);
|
|
};
|
|
|
|
'csr'i {
|
|
// condition status register.
|
|
Parse(parser, tkXREGISTER, 1, command);
|
|
};
|
|
|
|
'sp'i {
|
|
// stack pointer aka a7
|
|
Parse(parser, tkAREGISTER, 7, command);
|
|
};
|
|
|
|
'fp'i {
|
|
// frame pointer aka a6
|
|
Parse(parser, tkAREGISTER, 6, command);
|
|
};
|
|
|
|
# commands...
|
|
|
|
'bt'i | 'backtrace'i {
|
|
Parse(parser, tkBACKTRACE, 0, command);
|
|
};
|
|
|
|
'c'i | 'continue'i {
|
|
Parse(parser, tkCONTINUE, 0, command);
|
|
};
|
|
|
|
'hd'i | 'dump'i {
|
|
Parse(parser, tkDUMP, 0, command);
|
|
};
|
|
|
|
|
|
'sc'i | 'stackcrawl'i {
|
|
Parse(parser, tkSTACKCRAWL, 0, command);
|
|
};
|
|
|
|
|
|
'h'i | 'help'i {
|
|
Parse(parser, tkHELP, 0, command);
|
|
};
|
|
|
|
'l'i | 'list'i {
|
|
Parse(parser, tkLIST, 0, command);
|
|
};
|
|
|
|
'n'i | 'next'i {
|
|
Parse(parser, tkNEXT, 0, command);
|
|
};
|
|
|
|
's'i | 'step'i {
|
|
Parse(parser, tkNEXT, 0, command);
|
|
};
|
|
|
|
'b'i | 'brk'i | 'break'i {
|
|
Parse(parser, tkBREAK, 0, command);
|
|
};
|
|
|
|
'tbrk'i | 'tbreak'i | 'toolbreak'i {
|
|
Parse(parser, tkTBREAK, 0, command);
|
|
};
|
|
|
|
'mbrk'i | 'mbreak'i | 'rwbrk'i | 'rwbreak'i {
|
|
Parse(parser, tkRWBREAK, 0, command);
|
|
};
|
|
|
|
'rbrk'i | 'rbreak'i {
|
|
Parse(parser, tkRBREAK, 0, command);
|
|
};
|
|
|
|
'wbrk'i | 'wbreak'i {
|
|
Parse(parser, tkWBREAK, 0, command);
|
|
};
|
|
|
|
|
|
'g'i | 'go'i {
|
|
Parse(parser, tkCONTINUE, 0, command);
|
|
};
|
|
|
|
'p'i | 'print'i {
|
|
Parse(parser, tkPRINT, 0, command);
|
|
};
|
|
|
|
'r'i | 'run'i {
|
|
Parse(parser, tkCONTINUE, 0, command);
|
|
};
|
|
|
|
|
|
# generic identifier
|
|
# since % is a valid character, should drop %/modulo operator.
|
|
[%_A-Za-z][%_.A-Za-z0-9]* {
|
|
|
|
std::unique_ptr<std::string> sp(new std::string(ts, te));
|
|
|
|
Parse(parser, tkIDENTIFIER, Token::Make(sp.get(), 0), command);
|
|
Strings.push_back(std::move(sp));
|
|
};
|
|
|
|
|
|
# end of the line...
|
|
#0 {
|
|
# Parse(parser, tkEOL, 0, command);
|
|
#};
|
|
|
|
#any {
|
|
# fprintf(stderr, "illegal character: `%c`\n", *ts);
|
|
# fbreak;
|
|
#};
|
|
|
|
|
|
*|;
|
|
}%%
|
|
|
|
namespace Debug {
|
|
|
|
bool ParseLine(const char *iter, Command *command)
|
|
{
|
|
%% write data;
|
|
|
|
void *parser;
|
|
|
|
// string table to avoid memory leaks in parser.
|
|
std::deque<std::unique_ptr<std::string>> Strings;
|
|
|
|
|
|
parser = ParseAlloc(malloc);
|
|
|
|
//ParseTrace(stdout, "--> ");
|
|
command->action = cmdNull;
|
|
|
|
int length = std::strlen(iter);
|
|
const char *p = iter;
|
|
const char *pe = iter + length;
|
|
const char *eof = pe;
|
|
const char *ts;
|
|
const char *te;
|
|
int cs, act;
|
|
|
|
%% write init;
|
|
|
|
|
|
%% write exec;
|
|
|
|
if (cs == lexer_error || cs < lexer_first_final)
|
|
{
|
|
if (p == eof)
|
|
{
|
|
fprintf(stderr, "Unexpected end of line\n");
|
|
}
|
|
else
|
|
{
|
|
for (size_t i = 0, l = 2 + (p - iter); i < l; ++i)
|
|
fputc(' ', stderr);
|
|
|
|
fprintf(stderr, "^\nunexpected character: `%c'\n", *p);
|
|
|
|
}
|
|
|
|
ParseFree(parser, free);
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
if (cs == lexer_en_error)
|
|
{
|
|
ParseFree(parser, free);
|
|
return false;
|
|
}
|
|
|
|
if (cs < lexer_first_final)
|
|
{
|
|
fprintf(stderr, "Incomplete command\n");
|
|
ParseFree(parser, free);
|
|
return false;
|
|
}
|
|
*/
|
|
|
|
if (p == pe)
|
|
{
|
|
// always true?
|
|
Parse(parser, tkEOL, 0, command);
|
|
}
|
|
|
|
Parse(parser, 0, 0, command);
|
|
ParseFree(parser, free);
|
|
|
|
if (!command->valid)
|
|
fprintf(stderr,"I don't understand.\n");
|
|
|
|
return command->valid;
|
|
|
|
}
|
|
|
|
} // namespace
|