lib/command_lex.l

   1 %{
   2 #include "command_parse.h"
   3
   4 extern void set_buffer_string(const char *);
   5 %}
   6
   7 WORD            [a-z][-_a-z0-9]+
   8 IPV4            A\.B\.C\.D
   9 IPV4_PREFIX     A\.B\.C\.D\/M
  10 IPV6            X:X::X:X
  11 IPV6_PREFIX     X:X::X:X\/M
  12 VARIABLE        [A-Z][A-Z_]+
  13 NUMBER          [0-9]{1,20}
  14 RANGE           \({NUMBER}\-{NUMBER}\)
  15
  16 /* yytext shall be a pointer */
  17 %pointer
  18 %option noyywrap
  19 %option nounput
  20 %option noinput
  21 %option outfile="command_lex.c"
  22
  23 %%
  24 [ /t]           /* ignore whitespace */;
  25 {WORD}          {yylval.string = strdup(yytext); return WORD;}
  26 {IPV4}          {yylval.string = strdup(yytext); return IPV4;}
  27 {IPV4_PREFIX}   {yylval.string = strdup(yytext); return IPV4_PREFIX;}
  28 {IPV6}          {yylval.string = strdup(yytext); return IPV6;}
  29 {IPV6_PREFIX}   {yylval.string = strdup(yytext); return IPV6_PREFIX;}
  30 {VARIABLE}      {yylval.string = strdup(yytext); return VARIABLE;}
  31 {NUMBER}        {yylval.integer = atoi(yytext); return NUMBER;}
  32 {RANGE}         {yylval.string = strdup(yytext); return RANGE;}
  33 .               {return yytext[0];}
  34 %%
  35
  36 void
  37 set_buffer_string(const char *string)
  38 {
  39   yy_scan_string(string);
  40 }