git.cworth.org Git - ttt/blob - src/ttt-lex.l

   1   /* Definitions */
   2
   3 %option reentrant
   4 %option noyywrap
   5
   6 %{
   7 #include "ttt-token.h"
   8
   9 #define YY_DECL int yylex (yyscan_t yyscanner, ttt_token_t *token)
  10
  11 #define STRING_BUF_SIZE 8000
  12 %}
  13
  14 %x STRING
  15
  16 %%
  17
  18         char string_buf[STRING_BUF_SIZE];
  19         char *string_buf_ptr;
  20
  21   /* Rules */
  22
  23 \r\n            {
  24                         token->type = TTT_TOKEN_TYPE_NEWLINE;
  25                         return token->type;
  26                 }
  27
  28 \"              {
  29                         string_buf_ptr = string_buf;
  30                         BEGIN (STRING);
  31                 }
  32
  33 <STRING>{
  34                 \\\"            {
  35                                         *string_buf_ptr++ = '"';
  36                                 }
  37
  38                 \\              {
  39                                         *string_buf_ptr++ = '\\';
  40                                 }
  41
  42                 [^\\\"\\]+      {
  43                                         char *s = yytext;
  44
  45                                         while (*s)
  46                                               *string_buf_ptr++ = *s++;
  47                                 }
  48
  49                 \"              {
  50                                         BEGIN (INITIAL);
  51                                         *string_buf_ptr = '\0';
  52                                         token->type = TTT_TOKEN_TYPE_STRING;
  53                                         token->u.string = xstrdup (string_buf);
  54                                         return token->type;
  55                                 }
  56 }
  57
  58 [^ \t\r\n\"][^ \t\r\n\"]*       {
  59                         token->type = TTT_TOKEN_TYPE_STRING;
  60                         token->u.string = xstrdup (yytext);
  61                         return token->type;
  62                 }
  63
  64 [ \t\r\n]       ;