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283 lines
12 KiB
C
283 lines
12 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 noinput nounput always-interactive 8bit prefix="dbg_"
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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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#define YY_NO_UNISTD_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 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 = 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++] = malloc(size + 1);
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}
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static 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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static char* lexeme_alloc_if(const char* lexeme, unsigned sz)
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{
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size_t len = strlen(lexeme);
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char* ptr;
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if (len <= sz) return NULL;
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len -= sz;
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ptr = lexeme_alloc_size(len + 1);
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memcpy(ptr, lexeme, len);
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ptr[len] = '\0';
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return ptr;
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}
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void lexeme_flush(void)
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{
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while (--next_lexeme >= 0) free(local_lexemes[next_lexeme]);
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next_lexeme = 0;
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}
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/* called with quoted string, unescape all elements inside the quotes */
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static char* unescape_string(const char* str)
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{
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size_t len = strlen(str) - 2;
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char* ret = lexeme_alloc_size(len + 1);
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char* dst = ret;
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const char* ptr;
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for (ptr = str + 1; ptr < str + 1 + len; ptr++)
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{
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if (*ptr == '\\')
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{
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switch (*++ptr)
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{
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case 't': *dst++ = '\t'; break;
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case 'r': *dst++ = '\r'; break;
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case 'n': *dst++ = '\n'; break;
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case '\\': *dst++ = '\\'; break;
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case '"': *dst++ = '"'; break;
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default: *dst++ = '\\'; *dst++ = *ptr; /* not handled, don't change */
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}
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}
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else
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*dst++ = *ptr;
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}
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*dst = '\0';
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return ret;
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}
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static int resolve_identifier(const char* id, DBG_STYPE* lval)
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{
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if (types_find_type(id, SymTagTypedef, &lval->type)) return tTYPEDEF;
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lval->string = lexeme_alloc(id);
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return tIDENTIFIER;
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}
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#define YY_INPUT(buf,result,max_size) \
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(result = input_lex_read_buffer(buf, max_size))
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static int syntax_error;
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%}
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OCTDIGIT [0-7]
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DIGIT [0-9]
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HEXDIGIT [0-9a-fA-F]
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FORMAT [ubcdgiswxa]
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IDENTIFIER [_a-zA-Z~?][_a-zA-Z0-9~?@]*
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SCOPED_IDENTIFIER [_a-zA-Z~?][_a-zA-Z0-9~?@]*"::"
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MODULE_IDENTIFIER [_a-zA-Z~?\*][_a-zA-Z0-9~?\*@\.]*"!"
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PATHNAME [\\/_a-zA-Z0-9\.~@][\\/\-_a-zA-Z0-9\.~@]*
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STRING \"(\\[^\n]|[^\\"\n])*\"
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%s FORMAT_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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%s PATH_ACCEPTED
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%x PATH_EXPECTED
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%x ASTRING_EXPECTED
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%x AWORD_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_num_processes() && YYSTATE == INITIAL) {BEGIN(NOPROCESS);}
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<<EOF>> { return tEOF; }
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<*>"#"[^\n]* /* Skip comments */
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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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"||" { 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 *yytext; }
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"]" { return *yytext; }
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"0x"{HEXDIGIT}+ { sscanf(yytext, "%I64x", &dbg_lval.integer); return tNUM; }
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{DIGIT}+ { sscanf(yytext, "%I64d", &dbg_lval.integer); return tNUM; }
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"'\\''" { dbg_lval.integer = '\''; return tNUM;}
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"'\\0"{OCTDIGIT}*"'" { sscanf(yytext + 3, "%I64o", &dbg_lval.integer); return tNUM;}
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"'\\x"{HEXDIGIT}+"'" { sscanf(yytext + 3, "%I64x", &dbg_lval.integer); return tNUM;}
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"'\\"[a-z]"'" { dbg_lval.integer = yytext[2] - 'a'; return tNUM;}
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"'"."'" { dbg_lval.integer = yytext[1]; return tNUM;}
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<FORMAT_EXPECTED>"/"{DIGIT}+{FORMAT} { char* last;
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dbg_lval.integer = strtol(yytext+1, &last, 0) << 8;
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dbg_lval.integer |= *last;
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return tFORMAT; }
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<FORMAT_EXPECTED>"/"{FORMAT} { dbg_lval.integer = (1 << 8) | yytext[1]; return tFORMAT; }
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<*>{STRING} { dbg_lval.string = unescape_string(yytext); return tSTRING;}
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<ASTRING_EXPECTED>[^\n]+ { char* p = yytext; while (*p == ' ' || *p == '\t') p++;
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dbg_lval.string = lexeme_alloc(p); return tSTRING; }
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<AWORD_EXPECTED>[^ \t\n]+ { char* p = yytext; while (*p == ' ' || *p == '\t') p++;
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dbg_lval.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,INFO_CMD>frame|fram|fra|fr { BEGIN(NOCMD); return tFRAME; }
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<INITIAL>list|lis|li|l { BEGIN(PATH_ACCEPTED); 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>thread|threa|thre|thr|th { BEGIN(NOCMD); return tTHREAD; }
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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>continue|continu|contin|conti|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>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(PATH_ACCEPTED); return tBREAK; }
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<INITIAL,INFO_CMD,BD_CMD>hbreak|hbrea|hbre|hbr|hb { BEGIN(PATH_ACCEPTED); return tHBREAK; }
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<INITIAL>watch|watc|wat { BEGIN(NOCMD); return tWATCH; }
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<INITIAL>rwatch|rwatc|rwat { BEGIN(NOCMD); return tRWATCH; }
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<INITIAL>whatis|whati|what { BEGIN(NOCMD); return tWHATIS; }
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<INITIAL,NOPROCESS>run|ru|r { BEGIN(AWORD_EXPECTED); return tRUN;}
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<INITIAL>detach|detac|deta|det { BEGIN(NOCMD); return tDETACH; }
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<INITIAL>kill|kil|ki|k { BEGIN(NOCMD); return tKILL; }
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<INITIAL,NOPROCESS>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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<MAINT_CMD>module|modul|mod { BEGIN(ASTRING_EXPECTED); return tMODULE; }
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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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<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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{MODULE_IDENTIFIER}?void { dbg_lval.string = lexeme_alloc_if(yytext, 5); return tVOID; } /* return modulename if present */
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{MODULE_IDENTIFIER}?char { dbg_lval.string = lexeme_alloc_if(yytext, 5); return tCHAR; }
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{MODULE_IDENTIFIER}?WCHAR { dbg_lval.string = lexeme_alloc_if(yytext, 6); return tWCHAR; }
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{MODULE_IDENTIFIER}?short { dbg_lval.string = lexeme_alloc_if(yytext, 6); return tSHORT; }
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{MODULE_IDENTIFIER}?int { dbg_lval.string = lexeme_alloc_if(yytext, 4); return tINT; }
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{MODULE_IDENTIFIER}?long { dbg_lval.string = lexeme_alloc_if(yytext, 5); return tLONG; }
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{MODULE_IDENTIFIER}?float { dbg_lval.string = lexeme_alloc_if(yytext, 6); return tFLOAT; }
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{MODULE_IDENTIFIER}?double { dbg_lval.string = lexeme_alloc_if(yytext, 7); return tDOUBLE; }
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{MODULE_IDENTIFIER}?unsigned { dbg_lval.string = lexeme_alloc_if(yytext, 9); return tUNSIGNED; }
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{MODULE_IDENTIFIER}?signed { dbg_lval.string = lexeme_alloc_if(yytext, 7); 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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{MODULE_IDENTIFIER}?{SCOPED_IDENTIFIER}*{IDENTIFIER} { return resolve_identifier(yytext, &dbg_lval); }
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"$"{IDENTIFIER} { dbg_lval.string = lexeme_alloc(yytext+1); return tINTVAR; }
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<PATH_EXPECTED,PATH_ACCEPTED>{PATHNAME} { dbg_lval.string = lexeme_alloc(yytext); return tPATH; }
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[-+<=>|&^()*/%:!~,\.] { return *yytext; }
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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 dbg_wrap
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int dbg_wrap(void) { return 1; }
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#endif
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