debugger/debug.l

   1
   2
   3 /* Lexical scanner for command line parsing in the Wine debugger
   4  *
   5  * Version 1.0
   6  * Eric Youngdale
   7  * 9/93
   8  */
   9
  10 %{
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include "dbg.tab.h"
  14 #include "regpos.h"
  15
  16 #ifdef USE_READLINE
  17 #undef YY_INPUT
  18 #define YY_INPUT(buf,result,max_size) \
  19         if ( (result = dbg_read((char *) buf, max_size )) < 0 ) \
  20             YY_FATAL_ERROR( "read() in flex scanner failed" );
  21 #endif
  22
  23 extern char * readline(char *);
  24 static char * make_symbol(char *);
  25 void flush_symbols();
  26 static int syntax_error;
  27 extern int yylval;
  28 %}
  29
  30 DIGIT   [0-9]
  31 HEXDIGIT [0-9a-fA-F]
  32
  33 IDENTIFIER [_a-zA-Z\.~][_a-zA-Z0-9\.~]*
  34
  35 %%
  36
  37 \n              { syntax_error = 0; return '\n'; } /* Indicate end of command */
  38
  39 "+"             { return '+'; }
  40
  41 "-"             { return '-'; }
  42
  43 "/"             { return '/'; }
  44
  45 "="             { return '='; }
  46
  47 "("             { return '('; }
  48
  49 ")"             { return ')'; }
  50
  51 "*"             { return '*'; }
  52
  53 "?"             { return HELP; }
  54
  55 "0x"+{HEXDIGIT}+   {
  56                 sscanf(yytext, "%lx", &yylval);
  57                 return NUM;
  58                 }
  59
  60 {DIGIT}+   {
  61                 sscanf(yytext, "%ld", &yylval);
  62                 return NUM;
  63                 }
  64
  65 $pc             { yylval = RN_EIP; return REG;}
  66 $sp             { yylval = RN_ESP; return REG;}
  67 $eip            { yylval = RN_EIP; return REG;}
  68 $esp            { yylval = RN_ESP; return REG;}
  69 $ebp            { yylval = RN_EBP; return REG;}
  70 $eax            { yylval = RN_EAX; return REG;}
  71 $ebx            { yylval = RN_EBX; return REG;}
  72 $ecx            { yylval = RN_ECX; return REG;}
  73 $edx            { yylval = RN_EDX; return REG;}
  74 $esi            { yylval = RN_ESI; return REG;}
  75 $edi            { yylval = RN_EDI; return REG;}
  76
  77 $es             { yylval = RN_ES;  return REG;}
  78 $ds             { yylval = RN_DS;  return REG;}
  79 $cs             { yylval = RN_CS;  return REG;}
  80 $ss             { yylval = RN_SS;  return REG;}
  81
  82 info|inf|in             { return INFO; }
  83
  84 break|brea|bre          { return BREAK; }
  85 enable|enabl|enab|ena   { return ENABLE;}
  86 disable|disabl|disab|disa|dis { return DISABLE; }
  87
  88 quit|qui|qu     { return QUIT; }
  89
  90 help|hel|he     { return HELP; }
  91
  92 set|se          { return SET; }
  93
  94 bt              { return BACKTRACE; }
  95
  96 cont|con|co             { return CONT; }
  97
  98 symbolfile|symbolfil|symbolfi|symbolf|symbol|symbo|symb { return SYMBOLFILE; }
  99
 100 define|defin|defi|def|de        { return DEFINE; }
 101 print|prin|pri|pr               { return PRINT; }
 102
 103 mode                            { return MODE; }
 104
 105 regs|reg|re     { return REGS; }
 106
 107 stack|stac|sta|st       { return STACK; }
 108
 109 x               { return 'x'; }
 110 d               { return 'd'; }
 111 i               { return 'i'; }
 112 w               { return 'w'; }
 113 b               { return 'b'; }
 114 s               { return 's'; }
 115 c               { return 'c'; }
 116
 117 {IDENTIFIER}    {yylval = (int) make_symbol(yytext);
 118                   return IDENTIFIER;
 119                  }
 120
 121 [ \t]+        /* Eat up whitespace */
 122
 123 .               { if(syntax_error == 0) {
 124                 syntax_error ++; fprintf(stderr, "Syntax Error\n"); }
 125                 }
 126
 127 %%
 128
 129 #ifndef yywrap
 130 int yywrap(void) { return 1; }
 131 #endif
 132
 133 #ifdef USE_READLINE
 134 #ifndef whitespace
 135 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
 136 #endif
 137
 138 #if 0
 139 /* Used only with GNU readline */
 140 #include "readline/readline.h"
 141 #include "readline/chardefs.h"
 142 #endif
 143
 144 dbg_read(char * buf, int size){
 145         char * line;
 146         int len;
 147
 148         do{
 149                 flush_symbols();
 150                 line = readline ("Wine-dbg>");
 151                 len = strlen(line);
 152
 153                 if (!line)
 154                 {
 155                         return 0;
 156                 }
 157                 else
 158                 {
 159                         /* Remove leading and trailing whitespace from the line.
 160                            Then, if there is anything left, add it to the history list
 161                            and execute it. */
 162                         stripwhite (line);
 163
 164                         if (*line)
 165                         {
 166                                 add_history (line);
 167                                 if(size < len + 1){
 168                                         fprintf(stderr,"Fatal readline goof.\n");
 169                                         exit(0);
 170                                 };
 171                                 strcpy(buf, line);
 172                                 buf[len] = '\n';
 173                                 buf[len+1] = 0;
 174                                 free(line);
 175                                 return len + 1;
 176                         }
 177                 }
 178
 179         } while (1==1);
 180 }
 181
 182 /* Strip whitespace from the start and end of STRING. */
 183 stripwhite (string)
 184      char *string;
 185 {
 186   register int i = 0;
 187
 188   while (whitespace (string[i]))
 189     i++;
 190
 191   if (i)
 192     strcpy (string, string + i);
 193
 194   i = strlen (string) - 1;
 195
 196   while (i > 0 && whitespace (string[i]))
 197     i--;
 198
 199   string[++i] = '\0';
 200 }
 201
 202 static char *local_symbols[10];
 203 static int next_symbol;
 204
 205 char * make_symbol(char * symbol){
 206         return local_symbols[next_symbol++] = strdup(symbol);
 207 }
 208
 209 void
 210 flush_symbols(){
 211         while(--next_symbol>= 0) free(local_symbols[next_symbol]);
 212         next_symbol = 0;
 213 }
 214
 215 #endif