projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 91a455c6 BJ |
1 | static char *sccsid = "@(#)hist.c 4.1 %G%"; |
| 2 | ||
| 3 | #include "sh.h" | |
| 4 | ||
| 5 | /* | |
| 6 | * C shell | |
| 7 | */ | |
| 8 | ||
| 9 | savehist(sp) | |
| 10 | struct wordent *sp; | |
| 11 | { | |
| 12 | register struct Hist *hp, *np; | |
| 13 | int histlen; | |
| 14 | register char *cp; | |
| 15 | ||
| 16 | cp = value("history"); | |
| 17 | if (*cp == 0) | |
| 18 | histlen = 0; | |
| 19 | else { | |
| 20 | while (*cp && digit(*cp)) | |
| 21 | cp++; | |
| 22 | /* avoid a looping snafu */ | |
| 23 | if (*cp) | |
| 24 | set("history", "10"); | |
| 25 | histlen = getn(value("history")); | |
| 26 | } | |
| 27 | /* throw away null lines */ | |
| 28 | if (sp->next->word[0] == '\n') | |
| 29 | return; | |
| 30 | for (hp = &Histlist; np = hp->Hnext;) | |
| 31 | if (eventno - np->Href >= histlen || histlen == 0) | |
| 32 | hp->Hnext = np->Hnext, hfree(np); | |
| 33 | else | |
| 34 | hp = np; | |
| 35 | enthist(++eventno, sp, 1); | |
| 36 | } | |
| 37 | ||
| 38 | struct Hist * | |
| 39 | enthist(event, lp, docopy) | |
| 40 | int event; | |
| 41 | register struct wordent *lp; | |
| 42 | bool docopy; | |
| 43 | { | |
| 44 | register struct Hist *np; | |
| 45 | ||
| 46 | np = (struct Hist *) calloc(1, sizeof *np); | |
| 47 | np->Hnum = np->Href = event; | |
| 48 | if (docopy) | |
| 49 | copylex(&np->Hlex, lp); | |
| 50 | else { | |
| 51 | np->Hlex.next = lp->next; | |
| 52 | lp->next->prev = &np->Hlex; | |
| 53 | np->Hlex.prev = lp->prev; | |
| 54 | lp->prev->next = &np->Hlex; | |
| 55 | } | |
| 56 | np->Hnext = Histlist.Hnext; | |
| 57 | Histlist.Hnext = np; | |
| 58 | return (np); | |
| 59 | } | |
| 60 | ||
| 61 | hfree(hp) | |
| 62 | register struct Hist *hp; | |
| 63 | { | |
| 64 | ||
| 65 | freelex(&hp->Hlex); | |
| 66 | xfree((char *)hp); | |
| 67 | } | |
| 68 | ||
| 69 | dohist(vp) | |
| 70 | char **vp; | |
| 71 | { | |
| 72 | int n, rflg = 0; | |
| 73 | ||
| 74 | if (getn(value("history")) == 0) | |
| 75 | return; | |
| 76 | if (setintr) | |
| 77 | sigrelse(SIGINT); | |
| 78 | vp++; | |
| 79 | if (*vp && eq(*vp, "-r")) { | |
| 80 | rflg++; | |
| 81 | vp++; | |
| 82 | } | |
| 83 | if (*vp) | |
| 84 | n = getn(*vp); | |
| 85 | else | |
| 86 | n = 1000; | |
| 87 | dohist1(Histlist.Hnext, &n, rflg); | |
| 88 | } | |
| 89 | ||
| 90 | dohist1(hp, np, rflg) | |
| 91 | struct Hist *hp; | |
| 92 | int *np; | |
| 93 | { | |
| 94 | bool print = (*np) > 0; | |
| 95 | top: | |
| 96 | if (hp == 0) | |
| 97 | return; | |
| 98 | (*np)--; | |
| 99 | hp->Href++; | |
| 100 | if (rflg == 0) { | |
| 101 | dohist1(hp->Hnext, np, rflg); | |
| 102 | if (print) | |
| 103 | phist(hp); | |
| 104 | return; | |
| 105 | } | |
| 106 | if (*np >= 0) | |
| 107 | phist(hp); | |
| 108 | hp = hp->Hnext; | |
| 109 | goto top; | |
| 110 | } | |
| 111 | ||
| 112 | phist(hp) | |
| 113 | register struct Hist *hp; | |
| 114 | { | |
| 115 | ||
| 116 | printf("%6d\t", hp->Hnum); | |
| 117 | prlex(&hp->Hlex); | |
| 118 | } |