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258 lines
10 KiB
C
258 lines
10 KiB
C
/* -*-C-*-
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* Lexical scanner for command line parsing
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*
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* Copyright 1993 Eric Youngdale
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* 2000 Eric Pouech
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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%option nounput
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%{
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include "debugger.h"
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#include "dbg.tab.h"
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#undef YY_INPUT
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static int read_input(const char* pfx, char* buf, int size)
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{
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size_t len;
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static char* last_line = NULL;
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static size_t last_line_idx = 0;
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/* try first to fetch the remaining of an existing line */
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if (last_line_idx == 0)
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{
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char* tmp = NULL;
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/* no remaining chars to be read from last line, grab a brand new line up to '\n' */
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lexeme_flush();
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len = input_fetch_entire_line(pfx, &tmp);
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/* FIXME: should have a pair of buffers, and switch between the two, instead of
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* reallocating a new one for each line
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*/
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if (len == 0 || (len == 1 && tmp[0] == '\n') || (len == 2 && tmp[0] == '\r' && tmp[1] == '\n'))
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{
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HeapFree(GetProcessHeap(), 0, tmp);
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}
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else
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{
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HeapFree(GetProcessHeap(), 0, last_line);
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last_line = tmp;
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}
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}
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len = min(strlen(last_line + last_line_idx), size - 1);
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memcpy(buf, last_line + last_line_idx, len);
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buf[len] = '\0';
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if ((last_line_idx += len) >= strlen(last_line))
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last_line_idx = 0;
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return len;
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}
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#define YY_INPUT(buf,result,max_size) \
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if ((result = read_input("Wine-dbg>", buf, max_size)) < 0) \
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YY_FATAL_ERROR("read_input in flex scanner failed");
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static int syntax_error;
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%}
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DIGIT [0-9]
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HEXDIGIT [0-9a-fA-F]
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FORMAT [ubcdgiswx]
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IDENTIFIER [_a-zA-Z~?][_a-zA-Z0-9~?@]*
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PATHNAME [\\/-_a-zA-Z0-9\.~@]+
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STRING \"[^\n"]+\"
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%s FORMAT_EXPECTED
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%s PATH_EXPECTED
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%s INFO_CMD
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%s HELP_CMD
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%s BD_CMD
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%s LOCAL_CMD
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%s SHOW_CMD
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%s MODE_CMD
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%s MAINT_CMD
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%s NOCMD
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%x ASTRING_EXPECTED
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%x NOPROCESS
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%%
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/* set to special state when no process is loaded. */
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if (!dbg_curr_process && YYSTATE == INITIAL) {BEGIN(NOPROCESS);}
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<<EOF>> { return tEOF; }
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<*>\n { BEGIN(INITIAL); syntax_error = 0; return tEOL; }
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/* Indicates end of command. Reset state. */
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/* This rule must precede the ones below, */
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/* otherwise paths like '/' or '0x9' would */
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/* get parsed as an operator or tNUM */
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<PATH_EXPECTED>{PATHNAME} { yylval.string = lexeme_alloc(yytext); return tPATH; }
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"||" { return OP_LOR; }
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"&&" { return OP_LAND; }
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"==" { return OP_EQ; }
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"!=" { return OP_NE; }
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"<=" { return OP_LE; }
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">=" { return OP_GE; }
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"<<" { return OP_SHL; }
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">>" { return OP_SHR; }
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"->" { return OP_DRF; }
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"::" { return OP_SCOPE; }
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[-+<=>|&^()*/%:!~,\.] { return *yytext; }
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"[" { return *yytext; }
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"]" { return *yytext; }
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"0x"{HEXDIGIT}+ { sscanf(yytext, "%x", &yylval.integer); return tNUM; }
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{DIGIT}+ { sscanf(yytext, "%d", &yylval.integer); return tNUM; }
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<FORMAT_EXPECTED>"/"{DIGIT}+{FORMAT} { char* last;
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yylval.integer = strtol(yytext+1, &last, 0) << 8;
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yylval.integer |= *last;
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return tFORMAT; }
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<FORMAT_EXPECTED>"/"{FORMAT} { yylval.integer = (1 << 8) | yytext[1]; return tFORMAT; }
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{STRING} { yylval.string = lexeme_alloc(yytext + 1); yylval.string[strlen(yylval.string) - 1] = '\0'; return tSTRING; }
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<ASTRING_EXPECTED>[^\n]+ { char* p = yytext; while (*p == ' ' || *p == '\t') p++;
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yylval.string = lexeme_alloc(p); return tSTRING; }
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<INITIAL,NOPROCESS>info|inf|in { BEGIN(INFO_CMD); return tINFO; }
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<INITIAL>up { BEGIN(NOCMD); return tUP; }
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<INITIAL>down|dow|do { BEGIN(NOCMD); return tDOWN; }
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<INITIAL>frame|fram|fra|fr { BEGIN(NOCMD); return tFRAME; }
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<INITIAL>list|lis|li|l { BEGIN(PATH_EXPECTED); return tLIST; }
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<INITIAL>enable|enabl|enab|ena { BEGIN(BD_CMD); return tENABLE;}
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<INITIAL>disable|disabl|disab|disa|dis { BEGIN(BD_CMD); return tDISABLE; }
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<INITIAL>disassemble|disassembl|disassemb|disassem|disasse|disass|disas { BEGIN(NOCMD); return tDISASSEMBLE; }
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<INITIAL>locally|local { BEGIN(LOCAL_CMD); return tLOCAL; }
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<INITIAL,LOCAL_CMD>display|displa|displ|disp { BEGIN(FORMAT_EXPECTED); return tDISPLAY; }
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<INFO_CMD,BD_CMD>display|displa|displ|disp|dis|di|d { BEGIN(NOCMD); return tDISPLAY; }
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<INITIAL>undisplay|undispla|undispl|undisp|undis|undi|und { BEGIN(NOCMD); return tUNDISPLAY; }
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<INITIAL>delete|delet|dele|del { BEGIN(BD_CMD); return tDELETE; }
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<INITIAL,NOPROCESS>quit|qui|qu|q { BEGIN(NOCMD); return tQUIT; }
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<INITIAL>set|se { BEGIN(NOCMD); return tSET; }
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<INITIAL>x { BEGIN(FORMAT_EXPECTED); return tEXAM; }
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<INITIAL,NOPROCESS>help|hel|he|"?" { BEGIN(HELP_CMD); return tHELP; }
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<INITIAL,NOPROCESS>backtrace|backtrac|backtra|backt|back|bac|ba|bt { BEGIN(NOCMD); return tBACKTRACE; }
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<INITIAL,NOPROCESS>where|wher|whe { BEGIN(NOCMD); return tBACKTRACE; }
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<INITIAL>cont|con|co|c { BEGIN(NOCMD); return tCONT; }
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<INITIAL>pass|pas|pa { BEGIN(NOCMD); return tPASS; }
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<INITIAL>condition|conditio|conditi|condit|condi|cond { BEGIN(NOCMD); return tCOND; }
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<INITIAL>step|ste|st|s { BEGIN(NOCMD); return tSTEP; }
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<INITIAL>next|nex|ne|n { BEGIN(NOCMD); return tNEXT; }
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<INITIAL>stepi|si { BEGIN(NOCMD); return tSTEPI; }
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<INITIAL>nexti|ni { BEGIN(NOCMD); return tNEXTI; }
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<INITIAL>finish|finis|fini|fin|fi { BEGIN(NOCMD); return tFINISH; }
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<INITIAL>abort|abor|abo { BEGIN(NOCMD); return tABORT; }
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<INITIAL>print|prin|pri|pr|p { BEGIN(FORMAT_EXPECTED); return tPRINT; }
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<INITIAL>mode { BEGIN(MODE_CMD); return tMODE; }
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<INITIAL>show|sho|sh { BEGIN(SHOW_CMD); return tSHOW; }
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<INITIAL,NOPROCESS>source|sourc|sour|src { BEGIN(PATH_EXPECTED); return tSOURCE; }
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<INITIAL>symbolfile|symbols|symbol|sf { BEGIN(PATH_EXPECTED); return tSYMBOLFILE; }
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<INITIAL,INFO_CMD,BD_CMD>break|brea|bre|br|b { BEGIN(NOCMD); return tBREAK; }
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<INITIAL,INFO_CMD,BD_CMD>hbreak|hbrea|hbre|hbr|hb { BEGIN(NOCMD); return tHBREAK; }
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<INITIAL>watch|watc|wat { BEGIN(NOCMD); return tWATCH; }
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<INITIAL>whatis|whati|what { BEGIN(NOCMD); return tWHATIS; }
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<INITIAL,NOPROCESS>run|ru|r { BEGIN(ASTRING_EXPECTED); return tRUN;}
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<INITIAL>detach|detac|deta|det { BEGIN(NOCMD); return tDETACH; }
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<INITIAL>maintenance|maint { BEGIN(MAINT_CMD); return tMAINTENANCE; }
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<INITIAL>minidump|mdmp { BEGIN(PATH_EXPECTED); return tMINIDUMP; }
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<INITIAL>echo { BEGIN(ASTRING_EXPECTED); return tECHO; }
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<NOPROCESS>attach|attac|atta|att { BEGIN(NOCMD); return tATTACH; }
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<INFO_CMD>share|shar|sha { return tSHARE; }
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<INFO_CMD>locals|local|loca|loc { return tLOCAL; }
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<INFO_CMD>class|clas|cla { return tCLASS; }
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<INFO_CMD>process|proces|proce|proc { return tPROCESS; }
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<INFO_CMD>threads|thread|threa|thre|thr|th { return tTHREAD; }
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<INFO_CMD>exception|except|exc|ex { return tEXCEPTION; }
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<INFO_CMD>registers|regs|reg|re { return tREGS; }
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<INFO_CMD>allregs|allreg|allre { return tALLREGS; }
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<INFO_CMD>"all-registers"|"all-regs"|"all-reg"|"all-re" { return tALLREGS; }
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<INFO_CMD>segments|segment|segm|seg|se { return tSEGMENTS; }
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<INFO_CMD>stack|stac|sta|st { return tSTACK; }
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<INFO_CMD>symbol|symbo|symb|sym { BEGIN(ASTRING_EXPECTED); return tSYMBOL; }
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<INFO_CMD>maps|map { return tMAPS; }
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<INFO_CMD>window|windo|wind|win|wnd { return tWND; }
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<HELP_CMD>info|inf|in { return tINFO; }
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<MODE_CMD>vm86 { return tVM86; }
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<MAINT_CMD>type { return tTYPE; }
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<INITIAL,SHOW_CMD>directories|directorie|directori|director|directo|direct|direc|direc|dir {
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BEGIN(PATH_EXPECTED); return tDIR; }
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char { return tCHAR; }
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short { return tSHORT; }
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int { return tINT; }
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long { return tLONG; }
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float { return tFLOAT; }
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double { return tDOUBLE; }
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unsigned { return tUNSIGNED; }
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signed { return tSIGNED; }
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struct { return tSTRUCT; }
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union { return tUNION; }
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enum { return tENUM; }
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all { return tALL; }
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{IDENTIFIER} { yylval.string = lexeme_alloc(yytext); return tIDENTIFIER; }
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"$"{IDENTIFIER} { yylval.string = lexeme_alloc(yytext+1); return tINTVAR; }
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<*>[ \t\r]+ /* Eat up whitespace and DOS LF */
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<NOPROCESS>. { BEGIN(ASTRING_EXPECTED); yyless(0); return tNOPROCESS;}
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<*>. { if (syntax_error == 0) { syntax_error++; dbg_printf("Syntax Error (%s)\n", yytext); } }
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%%
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#ifndef yywrap
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int yywrap(void) { return 1; }
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#endif
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static char** local_lexemes /* = NULL */;
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static int next_lexeme /* = 0 */;
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static int alloc_lexeme /* = 0 */;
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char* lexeme_alloc_size(int size)
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{
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assert(0 <= next_lexeme && next_lexeme < alloc_lexeme + 1);
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if (next_lexeme >= alloc_lexeme)
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{
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alloc_lexeme += 32;
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local_lexemes = dbg_heap_realloc(local_lexemes, alloc_lexeme * sizeof(local_lexemes[0]));
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assert(local_lexemes);
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}
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return local_lexemes[next_lexeme++] = HeapAlloc(GetProcessHeap(), 0, size + 1);
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}
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char* lexeme_alloc(const char* lexeme)
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{
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char* ptr = lexeme_alloc_size(strlen(lexeme) + 1);
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return strcpy(ptr, lexeme);
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}
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void lexeme_flush(void)
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{
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while (--next_lexeme >= 0) HeapFree(GetProcessHeap(), 0, local_lexemes[next_lexeme]);
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next_lexeme = 0;
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}
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