| 1 | %{ |
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| 2 | #include "bellcore-copyright.h" |
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| 3 | #include "mit-copyright.h" |
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| 4 | |
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| 5 | #undef yywrap |
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| 6 | %} |
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| 7 | %% |
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| 8 | |
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| 9 | GLOBAL { |
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| 10 | strncat(linebuf,yytext,yyleng); |
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| 11 | return(GEXCEPT); |
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| 12 | } |
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| 13 | "->" { |
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| 14 | strncat(linebuf,yytext,yyleng); |
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| 15 | return(ARROW); |
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| 16 | } |
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| 17 | \\[\t ]*#[\t\40-\176]*\n |
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| 18 | { |
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| 19 | strcat(linebuf,"\n"); |
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| 20 | return(BACKNEW); |
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| 21 | } |
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| 22 | #[\t\40-\176]*$ ; |
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| 23 | [ \t]+ { |
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| 24 | strncat(linebuf,yytext,yyleng); |
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| 25 | return(WHITESPACE); |
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| 26 | } |
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| 27 | [\42\44-\71\73-\133\135-\176]+ { /* everything except # : ! and \ */ |
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| 28 | strncat(linebuf,yytext,yyleng); |
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| 29 | for ( wordp = yytext; |
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| 30 | *wordp == '/' && wordp[1]; |
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| 31 | wordp++); |
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| 32 | strcpy(wordbuf, wordp); |
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| 33 | return(WORD); |
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| 34 | } |
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| 35 | ":" { |
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| 36 | strncat(linebuf,yytext,yyleng); |
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| 37 | return(COLON); |
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| 38 | } |
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| 39 | "!" { |
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| 40 | strncat(linebuf,yytext,yyleng); |
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| 41 | return(BANG); |
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| 42 | } |
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| 43 | "\\" { |
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| 44 | strncat(linebuf,yytext,yyleng); |
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| 45 | return(BACKSLASH); |
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| 46 | } |
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| 47 | "\n" { |
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| 48 | strncat(linebuf,yytext,yyleng); |
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| 49 | return(NEWLINE); |
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| 50 | } |
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| 51 | "\\\n" { |
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| 52 | strcat(linebuf,"\n"); |
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| 53 | return(BACKNEW); |
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| 54 | } |
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| 55 | "\177" { |
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| 56 | strcat(linebuf,"\n"); |
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| 57 | return(NEWLINE); |
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| 58 | } |
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| 59 | %% |
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| 60 | |
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| 61 | int yywrap() |
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| 62 | { |
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| 63 | return 1; |
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| 64 | } |
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| 65 | |
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| 66 | #undef input |
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| 67 | /* this version of input() is identical to yylex' original, |
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| 68 | * except for the expression "endchar^='\177'", which is |
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| 69 | * returned at end-of-file, and which is 0 in the original version. |
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| 70 | * this expression will return '\177' on the 1st detection of EOF, |
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| 71 | * and 0 (as usually happens at EOF) at the next invocation of input(). |
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| 72 | * our version allows yylex() to tokenize EOF, and yyparse() to parse it, |
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| 73 | * so that an entry's command-field can optionally end without a newline. |
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| 74 | * track supports this possibility, because emacs doesn't automatically |
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| 75 | * terminate a file's last line with a newline. |
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| 76 | */ |
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| 77 | static unsigned char endchar = '\0'; |
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| 78 | # define input() (((yytchar=yysptr>yysbuf?U(*--yysptr):getc(yyin))==10?\ |
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| 79 | (yylineno++,yytchar):yytchar)==EOF?(endchar^='\177'):yytchar) |
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