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