projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 18d1c3cd JF |
1 | #include "global.h" |
| 2 | ||
| 3 | pbignum(current, useport) | |
| 4 | register lispval current; | |
| 5 | register FILE *useport; | |
| 6 | { | |
| 7 | int *top, *bot, *work, negflag = 0, *sp(), *alloca(); | |
| 8 | register int *digitp, *binp; | |
| 9 | register lispval last; | |
| 10 | ||
| 11 | /* copy bignum onto stack */ | |
| 12 | top = sp() - 1; | |
| 13 | do { | |
| 14 | stack(current->I); | |
| 15 | } while(current = current->CDR); | |
| 16 | ||
| 17 | bot = sp(); | |
| 18 | if (top==bot) { | |
| 19 | fprintf(useport,"%d",*bot); | |
| 20 | return; | |
| 21 | } | |
| 22 | ||
| 23 | /* save space for printed digits*/ | |
| 24 | work = alloca((top-bot)*2*sizeof(int)); | |
| 25 | if( *bot < 0) { | |
| 26 | negflag = 1; | |
| 27 | dsneg(top,bot); | |
| 28 | } | |
| 29 | ||
| 30 | /* figure out nine digits at a time by destructive division*/ | |
| 31 | for(digitp = work; bot <= top; digitp++) { | |
| 32 | *digitp = dodiv(top,bot); | |
| 33 | if(*bot==0) bot += 1; | |
| 34 | } | |
| 35 | ||
| 36 | /* print them out */ | |
| 37 | ||
| 38 | if(negflag) putc('-',useport); | |
| 39 | fprintf(useport,"%d",*--digitp); | |
| 40 | while ( digitp > work) fprintf(useport,"%09d",*--digitp); | |
| 41 | } |