| 1 | /* Copyright (c) 1979 Regents of the University of California */ |
| 2 | # |
| 3 | /* |
| 4 | * pi - Pascal interpreter code translator |
| 5 | * |
| 6 | * Charles Haley, Bill Joy UCB |
| 7 | * Version 1.1 February 1978 |
| 8 | * |
| 9 | * |
| 10 | * pxp - Pascal execution profiler |
| 11 | * |
| 12 | * Bill Joy UCB |
| 13 | * Version 1.1 February 1978 |
| 14 | */ |
| 15 | |
| 16 | #include "0.h" |
| 17 | #include "yy.h" |
| 18 | |
| 19 | char *tokname(); |
| 20 | |
| 21 | int bounce; |
| 22 | |
| 23 | /* |
| 24 | * Printing representation of a |
| 25 | * "character" - a lexical token |
| 26 | * not in a yytok structure. |
| 27 | * 'which' indicates which char * you want |
| 28 | * should always be called as "charname(...,0),charname(...,1)" |
| 29 | */ |
| 30 | char * |
| 31 | charname(ch , which ) |
| 32 | int ch; |
| 33 | int which; |
| 34 | { |
| 35 | struct yytok Ych; |
| 36 | |
| 37 | Ych.Yychar = ch; |
| 38 | Ych.Yylval = nullsem(ch); |
| 39 | return (tokname(&Ych , which )); |
| 40 | } |
| 41 | |
| 42 | /* |
| 43 | * Printing representation of a token |
| 44 | * 'which' as above. |
| 45 | */ |
| 46 | char * |
| 47 | tokname(tp , which ) |
| 48 | register struct yytok *tp; |
| 49 | int which; |
| 50 | { |
| 51 | register char *cp; |
| 52 | register struct kwtab *kp; |
| 53 | char *cp2; |
| 54 | |
| 55 | cp2 = ""; |
| 56 | switch (tp->Yychar) { |
| 57 | case YCASELAB: |
| 58 | cp = "case-label"; |
| 59 | break; |
| 60 | case YEOF: |
| 61 | cp = "end-of-file"; |
| 62 | break; |
| 63 | case YILLCH: |
| 64 | cp = "illegal character"; |
| 65 | break; |
| 66 | case 256: |
| 67 | /* error token */ |
| 68 | cp = "error"; |
| 69 | break; |
| 70 | case YID: |
| 71 | cp = "identifier"; |
| 72 | break; |
| 73 | case YNUMB: |
| 74 | cp = "real number"; |
| 75 | break; |
| 76 | case YINT: |
| 77 | case YBINT: |
| 78 | cp = "number"; |
| 79 | break; |
| 80 | case YSTRING: |
| 81 | cp = tp->Yylval; |
| 82 | cp = cp == NIL || cp[1] == 0 ? "character" : "string"; |
| 83 | break; |
| 84 | case YDOTDOT: |
| 85 | cp = "'..'"; |
| 86 | break; |
| 87 | default: |
| 88 | if (tp->Yychar < 256) { |
| 89 | cp = "'x'\0'x'"; |
| 90 | /* |
| 91 | * for twice reentrant code! |
| 92 | * used to be: |
| 93 | * if (bounce = ((bounce + 1) & 1)) |
| 94 | * cp += 4; |
| 95 | * now: don't bounce unless 0th call |
| 96 | */ |
| 97 | if ( which == 0 ) |
| 98 | bounce = ((bounce + 1) & 1); |
| 99 | if (bounce) |
| 100 | cp =+ 4; |
| 101 | cp[1] = tp->Yychar; |
| 102 | break; |
| 103 | } |
| 104 | for (kp = yykey; kp->kw_str != NIL && kp->kw_val != tp->Yychar; kp++) |
| 105 | continue; |
| 106 | cp = "keyword "; |
| 107 | cp2 = kp->kw_str; |
| 108 | } |
| 109 | return ( which ? cp2 : cp ); |
| 110 | } |