projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 54ee7326 BJ |
1 | # |
| 2 | /* | |
| 3 | * | |
| 4 | * UNIX debugger | |
| 5 | * | |
| 6 | */ | |
| 7 | ||
| 8 | #include "defs.h" | |
| 9 | SCCSID(@(#)input.c 2.2); | |
| 10 | ||
| 11 | INT mkfault; | |
| 12 | CHAR line[LINSIZ]; | |
| 13 | INT infile; | |
| 14 | CHAR *lp; | |
| 15 | CHAR peekc,lastc = EOR; | |
| 16 | INT eof; | |
| 17 | ||
| 18 | /* input routines */ | |
| 19 | ||
| 20 | eol(c) | |
| 21 | CHAR c; | |
| 22 | { | |
| 23 | return(c==EOR ORF c==';'); | |
| 24 | } | |
| 25 | ||
| 26 | rdc() | |
| 27 | { REP readchar(); | |
| 28 | PER lastc==SP ORF lastc==TB | |
| 29 | DONE | |
| 30 | return(lastc); | |
| 31 | } | |
| 32 | ||
| 33 | readchar() | |
| 34 | { | |
| 35 | IF eof | |
| 36 | THEN lastc=EOF; | |
| 37 | ELSE IF lp==0 | |
| 38 | THEN lp=line; | |
| 39 | #ifdef EDDT | |
| 40 | getcon(lp); eof=0; while (*lp++!=EOR); | |
| 41 | #else | |
| 42 | REP eof = read(infile,lp,1)==0; | |
| 43 | IF mkfault THEN error(0); FI | |
| 44 | PER eof==0 ANDF *lp++!=EOR DONE | |
| 45 | #endif | |
| 46 | *lp=0; lp=line; | |
| 47 | FI | |
| 48 | IF lastc = peekc THEN peekc=0; | |
| 49 | ELIF lastc = *lp THEN lp++; | |
| 50 | FI | |
| 51 | FI | |
| 52 | return(lastc); | |
| 53 | } | |
| 54 | ||
| 55 | nextchar() | |
| 56 | { | |
| 57 | IF eol(rdc()) | |
| 58 | THEN lp--; return(0); | |
| 59 | ELSE return(lastc); | |
| 60 | FI | |
| 61 | } | |
| 62 | ||
| 63 | quotchar() | |
| 64 | { | |
| 65 | IF readchar()=='\\' | |
| 66 | THEN return(readchar()); | |
| 67 | ELIF lastc=='\'' | |
| 68 | THEN return(0); | |
| 69 | ELSE return(lastc); | |
| 70 | FI | |
| 71 | } | |
| 72 | ||
| 73 | getformat(deformat) | |
| 74 | STRING deformat; | |
| 75 | { | |
| 76 | REG STRING fptr; | |
| 77 | REG BOOL quote; | |
| 78 | fptr=deformat; quote=FALSE; | |
| 79 | WHILE (quote ? readchar()!=EOR : !eol(readchar())) | |
| 80 | DO IF (*fptr++ = lastc)=='"' | |
| 81 | THEN quote = ~quote; | |
| 82 | FI | |
| 83 | OD | |
| 84 | lp--; | |
| 85 | IF fptr!=deformat THEN *fptr++ = '\0'; FI | |
| 86 | } | |
| 87 | ||
| 88 | #ifdef EDDT | |
| 89 | getcon(cs) register char *cs; { | |
| 90 | register char *p=cs; | |
| 91 | for(;;) { | |
| 92 | putchar(*p++=getcnsl()); | |
| 93 | if (p[-1]=='\r') {putchar(p[-1]='\n'); *p++='\0'; return;} | |
| 94 | if (p[-1]=='\\') {p[-1]=getcnsl(); continue;} | |
| 95 | if (p[-1]=='#') {p -= 2; continue;} | |
| 96 | if (p[-1]=='@') {putchar('\r'); putchar('\n'); p=cs; continue;} | |
| 97 | }} | |
| 98 | ||
| 99 | getcnsl() { | |
| 100 | # define RXCS 32 /* receiver control/staus */ | |
| 101 | # define RXDB 33 /* receiver data */ | |
| 102 | # define RXCS_DONE 0x80 /* receiver done */ | |
| 103 | while ((mfpr(RXCS) & RXCS_DONE)==0); | |
| 104 | return (mfpr(RXDB) & 0177); | |
| 105 | } | |
| 106 | #endif |