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