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   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, "%lx", &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 info|inf|in             { return INFO; }
  78
  79 quit|qui|qu     { return QUIT; }
  80
  81 help|hel|he     { return HELP; }
  82
  83 set|se          { return SET; }
  84
  85 cont|con|co             { return CONT; }
  86
  87 symbolfile|symbolfil|symbolfi|symbolf|symbol|symbo|symb { return SYMBOLFILE; }
  88
  89 define|defin|defi|def|de        { return DEFINE; }
  90 print|prin|pri|pr               { return PRINT; }
  91
  92 regs|reg|re     { return REGS; }
  93
  94 stack|stac|sta|st       { return STACK; }
  95
  96 x               { return 'x'; }
  97 d               { return 'd'; }
  98 i               { return 'i'; }
  99 w               { return 'w'; }
 100 b               { return 'b'; }
 101 s               { return 's'; }
 102 c               { return 'c'; }
 103
 104 {IDENTIFIER}    {yylval = (int) make_symbol(yytext);
 105                   return IDENTIFIER;
 106                  }
 107
 108 [ \t]+        /* Eat up whitespace */
 109
 110 .               { if(syntax_error == 0) {
 111                 syntax_error ++; fprintf(stderr, "Syntax Error\n"); }
 112                 }
 113
 114 %%
 115
 116 #ifndef yywrap
 117 int yywrap(void) { return 1; }
 118 #endif
 119
 120 #ifdef USE_READLINE
 121 #ifndef whitespace
 122 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
 123 #endif
 124
 125 #if 0
 126 /* Used only with GNU readline */
 127 #include "readline/readline.h"
 128 #include "readline/chardefs.h"
 129 #endif
 130
 131 dbg_read(char * buf, int size){
 132         char * line;
 133         int len;
 134
 135         do{
 136                 flush_symbols();
 137                 line = readline ("Wine-dbg>");
 138                 len = strlen(line);
 139
 140                 if (!line)
 141                 {
 142                         return 0;
 143                 }
 144                 else
 145                 {
 146                         /* Remove leading and trailing whitespace from the line.
 147                            Then, if there is anything left, add it to the history list
 148                            and execute it. */
 149                         stripwhite (line);
 150
 151                         if (*line)
 152                         {
 153                                 add_history (line);
 154                                 if(size < len + 1){
 155                                         fprintf(stderr,"Fatal readline goof.\n");
 156                                         exit(0);
 157                                 };
 158                                 strcpy(buf, line);
 159                                 buf[len] = '\n';
 160                                 buf[len+1] = 0;
 161                                 free(line);
 162                                 return len + 1;
 163                         }
 164                 }
 165
 166         } while (1==1);
 167 }
 168
 169 /* Strip whitespace from the start and end of STRING. */
 170 stripwhite (string)
 171      char *string;
 172 {
 173   register int i = 0;
 174
 175   while (whitespace (string[i]))
 176     i++;
 177
 178   if (i)
 179     strcpy (string, string + i);
 180
 181   i = strlen (string) - 1;
 182
 183   while (i > 0 && whitespace (string[i]))
 184     i--;
 185
 186   string[++i] = '\0';
 187 }
 188
 189 static char *local_symbols[10];
 190 static int next_symbol;
 191
 192 char * make_symbol(char * symbol){
 193         return local_symbols[next_symbol++] = strdup(symbol);
 194 }
 195
 196 void
 197 flush_symbols(){
 198         while(--next_symbol>= 0) free(local_symbols[next_symbol]);
 199         next_symbol = 0;
 200 }
 201
 202 #endif