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Sweden-Number/programs/winedbg/debug.l

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/* -*-C-*-
* Lexical scanner for command line parsing
*
* Copyright 1993 Eric Youngdale
* 2000 Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
%{
#include <stdlib.h>
#include <string.h>
#include "winbase.h"
#include "wincon.h"
#include "debugger.h"
#include "y.tab.h"
#undef YY_INPUT
HANDLE DEBUG_hParserInput;
HANDLE DEBUG_hParserOutput;
static int DEBUG_FetchFromLine(const char* pfx, char* buf, int size);
#define YY_INPUT(buf,result,max_size) \
if ( (result = DEBUG_FetchFromLine("Wine-dbg>", buf, max_size)) < 0 ) \
YY_FATAL_ERROR( "FetchFromLine() in flex scanner failed" );
#define YY_NO_UNPUT
static int syntax_error;
%}
DIGIT [0-9]
HEXDIGIT [0-9a-fA-F]
FORMAT [ubcdgiswx]
IDENTIFIER [_a-zA-Z~][_a-zA-Z0-9~@]*
PATHNAME [/_a-zA-Z\.~][/_a-zA-Z0-9\.~@]*
STRING \"[^\n"]+\"
%s FORMAT_EXPECTED
%s PATH_EXPECTED
%s INFO_CMD
%s HELP_CMD
%s DEL_CMD
%s WALK_CMD
%s SHOW_CMD
%s MODE_CMD
%s NOCMD
%x ASTRING_EXPECTED
%x NOPROCESS
%%
/* set to special state when no process is loaded. */
if (!DEBUG_CurrProcess && YYSTATE == INITIAL) {BEGIN(NOPROCESS);}
<<EOF>> { return tEOF; }
<*>\n { BEGIN(INITIAL); syntax_error = 0; return tEOL; }
/* Indicates end of command. Reset state. */
"||" { return OP_LOR; }
"&&" { return OP_LAND; }
"==" { return OP_EQ; }
"!=" { return OP_NE; }
"<=" { return OP_LE; }
">=" { return OP_GE; }
"<<" { return OP_SHL; }
">>" { return OP_SHR; }
"->" { return OP_DRF; }
[-+<=>|&^()*/%:!~,\.] { return *yytext; }
"[" { return *yytext; }
"]" { return *yytext; }
"0x"{HEXDIGIT}+ { sscanf(yytext, "%x", &yylval.integer); return tNUM; }
{DIGIT}+ { sscanf(yytext, "%d", &yylval.integer); return tNUM; }
<FORMAT_EXPECTED>"/"{DIGIT}+{FORMAT} { char* last;
yylval.integer = strtol( yytext+1, &last, 0 ) << 8;
yylval.integer |= *last;
return tFORMAT; }
<FORMAT_EXPECTED>"/"{FORMAT} { yylval.integer = (1 << 8) | yytext[1]; return tFORMAT; }
{STRING} { yylval.string = DEBUG_MakeSymbol(yytext); return tSTRING; }
<ASTRING_EXPECTED>[^\n]+ { char* p = yytext; while (*p == ' ' || *p == '\t') p++;
yylval.string = DEBUG_MakeSymbol(p); return tSTRING; }
<INITIAL>info|inf|in { BEGIN(INFO_CMD); return tINFO; }
<INITIAL>up { BEGIN(NOCMD); return tUP; }
<INITIAL>down|dow|do { BEGIN(NOCMD); return tDOWN; }
<INITIAL>frame|fram|fra|fr { BEGIN(NOCMD); return tFRAME; }
<INITIAL>list|lis|li|l { BEGIN(PATH_EXPECTED); return tLIST; }
<INITIAL>enable|enabl|enab|ena { BEGIN(NOCMD); return tENABLE;}
<INITIAL>disable|disabl|disab|disa|dis { BEGIN(NOCMD); return tDISABLE; }
<INITIAL>disassemble|disassembl|disassemb|disassem|disasse|disass|disas { BEGIN(NOCMD); return tDISASSEMBLE; }
<INITIAL,INFO_CMD,DEL_CMD>display|displa|displ|disp { BEGIN(FORMAT_EXPECTED); return tDISPLAY; }
<INITIAL>undisplay|undispla|undispl|undisp|undis|undi|und { BEGIN(NOCMD); return tUNDISPLAY; }
<INITIAL>delete|delet|dele|del { BEGIN(DEL_CMD); return tDELETE; }
<INITIAL,NOPROCESS>quit|qui|qu|q { BEGIN(NOCMD); return tQUIT; }
<INITIAL>set|se { BEGIN(NOCMD); return tSET; }
<INITIAL,NOPROCESS>walk|w { BEGIN(WALK_CMD); return tWALK; }
<INITIAL>x { BEGIN(FORMAT_EXPECTED); return tEXAM; }
<INITIAL,NOPROCESS>help|hel|he|"?" { BEGIN(HELP_CMD); return tHELP; }
<INITIAL>backtrace|backtrac|backtra|backt|back|bac|ba|bt { BEGIN(NOCMD); return tBACKTRACE; }
<INITIAL>where|wher|whe { BEGIN(NOCMD); return tBACKTRACE; }
<INITIAL>cont|con|co|c { BEGIN(NOCMD); return tCONT; }
<INITIAL>pass|pas|pa { BEGIN(NOCMD); return tPASS; }
<INITIAL>condition|conditio|conditi|condit|condi|cond { BEGIN(NOCMD); return tCOND; }
<INITIAL>step|ste|st|s { BEGIN(NOCMD); return tSTEP; }
<INITIAL>next|nex|ne|n { BEGIN(NOCMD); return tNEXT; }
<INITIAL>stepi|si { BEGIN(NOCMD); return tSTEPI; }
<INITIAL>nexti|ni { BEGIN(NOCMD); return tNEXTI; }
<INITIAL>finish|finis|fini|fin|fi { BEGIN(NOCMD); return tFINISH; }
<INITIAL>abort|abor|abo { BEGIN(NOCMD); return tABORT; }
<INITIAL>print|prin|pri|pr|p { BEGIN(FORMAT_EXPECTED); return tPRINT; }
<INITIAL>mode { BEGIN(MODE_CMD); return tMODE; }
<INITIAL>show|sho|sh { BEGIN(SHOW_CMD); return tSHOW; }
<INITIAL,NOPROCESS>source|sourc|sour|src { BEGIN(PATH_EXPECTED); return tSOURCE; }
<INITIAL>symbolfile|symbols|symbol|sf { BEGIN(PATH_EXPECTED); return tSYMBOLFILE; }
<INITIAL,INFO_CMD,DEL_CMD>break|brea|bre|br|b { BEGIN(NOCMD); return tBREAK; }
<INITIAL>watch|watc|wat { BEGIN(NOCMD); return tWATCH; }
<INITIAL>whatis|whati|what { BEGIN(NOCMD); return tWHATIS; }
<INITIAL,NOPROCESS>run|ru|r { BEGIN(ASTRING_EXPECTED); return tRUN;}
<INITIAL>detach|detac|deta|det { BEGIN(NOCMD); return tDETACH; }
<NOPROCESS>attach|attac|atta|att { BEGIN(NOCMD); return tATTACH; }
<INFO_CMD>share|shar|sha { return tSHARE; }
<INFO_CMD>locals|local|loca|loc { return tLOCAL; }
<INFO_CMD,WALK_CMD>class|clas|cla { return tCLASS; }
<INFO_CMD,WALK_CMD>module|modul|modu|mod { return tMODULE; }
<INFO_CMD,WALK_CMD>queue|queu|que { return tQUEUE; }
<INFO_CMD,WALK_CMD>process|proces|proce|proc { return tPROCESS; }
<INFO_CMD,WALK_CMD>threads|thread|threa|thre|thr|th { return tTHREAD; }
<INFO_CMD,WALK_CMD>modref|modre|modr { return tMODREF; }
<WALK_CMD>exception|except|exc|ex { return tEXCEPTION; }
<INFO_CMD>registers|regs|reg|re { return tREGS; }
<INFO_CMD>segments|segment|segm|seg|se { return tSEGMENTS; }
<INFO_CMD>stack|stac|sta|st { return tSTACK; }
<INFO_CMD>maps|map { return tMAPS; }
<INFO_CMD,WALK_CMD>window|windo|wind|win|wnd { return tWND; }
<HELP_CMD>info|inf|in { return tINFO; }
<MODE_CMD>vm86 { return tVM86; }
<INITIAL,SHOW_CMD>directories|directorie|directori|director|directo|direct|direc|direc|dir {
BEGIN(PATH_EXPECTED); return tDIR; }
char { return tCHAR; }
short { return tSHORT; }
int { return tINT; }
long { return tLONG; }
float { return tFLOAT; }
double { return tDOUBLE; }
unsigned { return tUNSIGNED; }
signed { return tSIGNED; }
struct { return tSTRUCT; }
union { return tUNION; }
enum { return tENUM; }
{IDENTIFIER} { yylval.string = DEBUG_MakeSymbol(yytext); return tIDENTIFIER; }
"$"{IDENTIFIER} { yylval.string = DEBUG_MakeSymbol(yytext+1); return tINTVAR; }
<PATH_EXPECTED>{PATHNAME} { yylval.string = DEBUG_MakeSymbol(yytext); return tPATH; }
<*>[ \t]+ /* Eat up whitespace */
<NOPROCESS>. { BEGIN(ASTRING_EXPECTED); yyless(0); return tNOPROCESS;}
<*>. { if (syntax_error == 0) {
syntax_error++;
DEBUG_Printf(DBG_CHN_MESG, "Syntax Error (%s)\n", yytext); }
}
%%
#ifndef yywrap
int yywrap(void) { return 1; }
#endif
#ifndef whitespace
#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
#endif
/* Strip whitespace from the start and end of STRING. */
static void stripwhite(char *string)
{
int i, last;
for (i = 0; whitespace(string[i]); i++);
if (i) strcpy(string, string + i);
last = i = strlen(string) - 1;
if (string[last] == '\n') i--;
while (i > 0 && whitespace(string[i])) i--;
if (string[last] == '\n')
string[++i] = '\n';
string[++i] = '\0';
}
static int DEBUG_FetchEntireLine(const char* pfx, char** line, size_t* alloc, BOOL check_nl)
{
char buf_line[256];
DWORD nread;
size_t len;
/* as of today, console handles can be file handles... so better use file APIs rather than
* consoles
*/
WriteFile(DEBUG_hParserOutput, pfx, strlen(pfx), NULL, NULL);
len = 0;
do
{
if (!ReadFile(DEBUG_hParserInput, buf_line, sizeof(buf_line) - 1, &nread, NULL) || nread == 0)
break;
buf_line[nread] = '\0';
if (check_nl && len == 0 && nread == 1 && buf_line[0] == '\n')
return 0;
/* store stuff at the end of last_line */
if (len + nread + 1 > *alloc)
{
*line = HeapReAlloc(GetProcessHeap(), 0, *line, *alloc += nread + 1);
}
strcpy(*line + len, buf_line);
len += nread;
} while (nread == 0 || buf_line[nread - 1] != '\n');
if (!len)
{
*line = HeapReAlloc(GetProcessHeap(), 0, *line, *alloc = 1);
**line = '\0';
}
/* Remove leading and trailing whitespace from the line */
stripwhite(*line);
return 1;
}
static int DEBUG_FetchFromLine(const char* pfx, char* buf, int size)
{
size_t len;
static char* last_line = NULL;
static size_t last_line_size = 0;
static size_t last_line_idx = 0;
/* first alloc of our current buffer */
if (!last_line)
{
last_line = HeapAlloc(GetProcessHeap(), 0, last_line_size = 2);
assert(last_line);
last_line[0] = '\n';
last_line[1] = '\0';
}
/* try first to fetch the remaining of an existing line */
if (last_line_idx == 0)
{
/* no remaining chars to be read from last line, grab a brand new line up to '\n' */
DEBUG_FlushSymbols();
DEBUG_FetchEntireLine(pfx, &last_line, &last_line_size, TRUE);
}
len = min(strlen(last_line + last_line_idx), size - 1);
memcpy(buf, last_line + last_line_idx, len);
buf[len] = '\0';
if ((last_line_idx += len) >= strlen(last_line))
last_line_idx = 0;
return len;
}
int DEBUG_ReadLine(const char* pfx, char* buf, int size)
{
char* line = NULL;
size_t len = 0;
DEBUG_FetchEntireLine(pfx, &line, &len, FALSE);
len = strlen(line);
/* remove trailing \n */
if (len > 0 && line[len - 1] == '\n') len--;
len = min(size - 1, len);
memcpy(buf, line, len);
buf[len] = '\0';
HeapFree(GetProcessHeap(), 0, line);
return 1;
}
static char** local_symbols /* = NULL */;
static int next_symbol /* = 0 */;
static int alloc_symbol /* = 0 */;
char* DEBUG_MakeSymbol(const char* symbol)
{
assert(0 <= next_symbol && next_symbol < alloc_symbol + 1);
if (next_symbol >= alloc_symbol)
{
local_symbols = HeapReAlloc(GetProcessHeap(), 0, local_symbols,
(alloc_symbol += 32) * sizeof(local_symbols[0]));
assert(local_symbols);
}
return local_symbols[next_symbol++] = DBG_strdup(symbol);
}
void DEBUG_FlushSymbols(void)
{
while(--next_symbol >= 0) DBG_free(local_symbols[next_symbol]);
next_symbol = 0;
}
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