projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 0a02ab26 BJ |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
| 2 | #include "sh.h" | |
| 3 | ||
| 4 | /* | |
| 5 | * C shell | |
| 6 | */ | |
| 7 | ||
| 8 | savehist(sp) | |
| 9 | struct wordent *sp; | |
| 10 | { | |
| 11 | register struct Hist *hp, *np; | |
| 12 | int histlen; | |
| 13 | register char *cp; | |
| 14 | ||
| 15 | cp = value("history"); | |
| 16 | if (*cp == 0) | |
| 17 | histlen = 0; | |
| 18 | else { | |
| 19 | while (*cp && digit(*cp)) | |
| 20 | cp++; | |
| 21 | /* avoid a looping snafu */ | |
| 22 | if (*cp) | |
| 23 | set("history", "10"); | |
| 24 | histlen = getn(value("history")); | |
| 25 | } | |
| 26 | /* throw away null lines */ | |
| 27 | if (sp->next->word[0] == '\n') | |
| 28 | return; | |
| 29 | for (hp = &Histlist; np = hp->Hnext;) | |
| 30 | if (eventno - np->Href >= histlen || histlen == 0) | |
| 31 | hp->Hnext = np->Hnext, hfree(np); | |
| 32 | else | |
| 33 | hp = np; | |
| 34 | enthist(++eventno, sp, 1); | |
| 35 | } | |
| 36 | ||
| 37 | struct Hist * | |
| 38 | enthist(event, lp, docopy) | |
| 39 | int event; | |
| 40 | register struct wordent *lp; | |
| 41 | bool docopy; | |
| 42 | { | |
| 43 | register struct Hist *np; | |
| 44 | ||
| 45 | np = (struct Hist *) calloc(1, sizeof *np); | |
| 46 | np->Hnum = np->Href = event; | |
| 47 | if (docopy) | |
| 48 | copylex(&np->Hlex, lp); | |
| 49 | else { | |
| 50 | np->Hlex.next = lp->next; | |
| 51 | lp->next->prev = &np->Hlex; | |
| 52 | np->Hlex.prev = lp->prev; | |
| 53 | lp->prev->next = &np->Hlex; | |
| 54 | } | |
| 55 | np->Hnext = Histlist.Hnext; | |
| 56 | Histlist.Hnext = np; | |
| 57 | return (np); | |
| 58 | } | |
| 59 | ||
| 60 | hfree(hp) | |
| 61 | register struct Hist *hp; | |
| 62 | { | |
| 63 | ||
| 64 | freelex(&hp->Hlex); | |
| 65 | xfree(hp); | |
| 66 | } | |
| 67 | ||
| 68 | dohist() | |
| 69 | { | |
| 70 | ||
| 71 | if (getn(value("history")) == 0) | |
| 72 | return; | |
| 73 | dohist1(Histlist.Hnext); | |
| 74 | } | |
| 75 | ||
| 76 | dohist1(hp) | |
| 77 | register struct Hist *hp; | |
| 78 | { | |
| 79 | ||
| 80 | if (hp == 0) | |
| 81 | return; | |
| 82 | hp->Href++; | |
| 83 | dohist1(hp->Hnext); | |
| 84 | phist(hp); | |
| 85 | } | |
| 86 | ||
| 87 | phist(hp) | |
| 88 | register struct Hist *hp; | |
| 89 | { | |
| 90 | ||
| 91 | printf("%6d\t", hp->Hnum); | |
| 92 | prlex(&hp->Hlex); | |
| 93 | } |