| 1 | #define Extern extern
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| 2 | #include <sys/types.h>
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| 3 | #include <sys/stat.h>
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| 4 | #include <sys/dir.h>
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| 5 | #include <limits.h>
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| 6 | #include <signal.h>
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| 7 | #include <errno.h>
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| 8 | #include <setjmp.h>
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| 9 | #include "sh.h"
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| 10 |
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| 11 | /* -------- eval.c -------- */
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| 12 | /* #include "sh.h" */
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| 13 | /* #include "word.h" */
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| 14 |
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| 15 | /*
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| 16 | * ${}
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| 17 | * `command`
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| 18 | * blank interpretation
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| 19 | * quoting
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| 20 | * glob
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| 21 | */
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| 22 |
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| 23 | _PROTOTYPE(static int expand, (char *cp, struct wdblock **wbp, int f ));
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| 24 | _PROTOTYPE(static char *blank, (int f ));
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| 25 | _PROTOTYPE(static int dollar, (int quoted ));
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| 26 | _PROTOTYPE(static int grave, (int quoted ));
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| 27 | _PROTOTYPE(void globname, (char *we, char *pp ));
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| 28 | _PROTOTYPE(static char *generate, (char *start1, char *end1, char *middle, char *end ));
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| 29 | _PROTOTYPE(static int anyspcl, (struct wdblock *wb ));
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| 30 | _PROTOTYPE(static int xstrcmp, (char *p1, char *p2 ));
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| 31 | _PROTOTYPE(void glob0, (char *a0, unsigned int a1, int a2, int (*a3)(char *, char *)));
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| 32 | _PROTOTYPE(void glob1, (char *base, char *lim ));
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| 33 | _PROTOTYPE(void glob2, (char *i, char *j ));
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| 34 | _PROTOTYPE(void glob3, (char *i, char *j, char *k ));
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| 35 | _PROTOTYPE(char *memcopy, (char *ato, char *from, int nb ));
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| 36 |
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| 37 | char **
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| 38 | eval(ap, f)
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| 39 | register char **ap;
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| 40 | int f;
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| 41 | {
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| 42 | struct wdblock *wb;
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| 43 | char **wp;
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| 44 | char **wf;
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| 45 | jmp_buf ev;
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| 46 |
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| 47 | wp = NULL;
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| 48 | wb = NULL;
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| 49 | wf = NULL;
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| 50 | if (newenv(setjmp(errpt = ev)) == 0) {
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| 51 | while (*ap && isassign(*ap))
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| 52 | expand(*ap++, &wb, f & ~DOGLOB);
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| 53 | if (flag['k']) {
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| 54 | for (wf = ap; *wf; wf++) {
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| 55 | if (isassign(*wf))
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| 56 | expand(*wf, &wb, f & ~DOGLOB);
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| 57 | }
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| 58 | }
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| 59 | for (wb = addword((char *)0, wb); *ap; ap++) {
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| 60 | if (!flag['k'] || !isassign(*ap))
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| 61 | expand(*ap, &wb, f & ~DOKEY);
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| 62 | }
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| 63 | wb = addword((char *)0, wb);
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| 64 | wp = getwords(wb);
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| 65 | quitenv();
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| 66 | } else
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| 67 | gflg = 1;
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| 68 | return(gflg? (char **)NULL: wp);
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| 69 | }
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| 70 |
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| 71 | /*
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| 72 | * Make the exported environment from the exported
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| 73 | * names in the dictionary. Keyword assignments
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| 74 | * will already have been done.
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| 75 | */
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| 76 | char **
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| 77 | makenv()
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| 78 |
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| 79 | {
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| 80 | register struct wdblock *wb;
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| 81 | register struct var *vp;
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| 82 |
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| 83 | wb = NULL;
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| 84 | for (vp = vlist; vp; vp = vp->next)
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| 85 | if (vp->status & EXPORT)
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| 86 | wb = addword(vp->name, wb);
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| 87 | wb = addword((char *)0, wb);
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| 88 | return(getwords(wb));
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| 89 | }
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| 90 |
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| 91 | char *
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| 92 | evalstr(cp, f)
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| 93 | register char *cp;
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| 94 | int f;
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| 95 | {
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| 96 | struct wdblock *wb;
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| 97 |
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| 98 | wb = NULL;
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| 99 | if (expand(cp, &wb, f)) {
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| 100 | if (wb == NULL || wb->w_nword == 0 || (cp = wb->w_words[0]) == NULL)
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| 101 | cp = "";
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| 102 | DELETE(wb);
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| 103 | } else
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| 104 | cp = NULL;
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| 105 | return(cp);
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| 106 | }
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| 107 |
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| 108 | static int
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| 109 | expand(cp, wbp, f)
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| 110 | register char *cp;
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| 111 | register struct wdblock **wbp;
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| 112 | int f;
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| 113 | {
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| 114 | jmp_buf ev;
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| 115 |
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| 116 | gflg = 0;
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| 117 | if (cp == NULL)
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| 118 | return(0);
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| 119 | if (!anys("$`'\"", cp) &&
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| 120 | !anys(ifs->value, cp) &&
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| 121 | ((f&DOGLOB)==0 || !anys("[*?", cp))) {
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| 122 | cp = strsave(cp, areanum);
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| 123 | if (f & DOTRIM)
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| 124 | unquote(cp);
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| 125 | *wbp = addword(cp, *wbp);
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| 126 | return(1);
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| 127 | }
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| 128 | if (newenv(setjmp(errpt = ev)) == 0) {
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| 129 | PUSHIO(aword, cp, strchar);
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| 130 | e.iobase = e.iop;
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| 131 | while ((cp = blank(f)) && gflg == 0) {
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| 132 | e.linep = cp;
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| 133 | cp = strsave(cp, areanum);
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| 134 | if ((f&DOGLOB) == 0) {
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| 135 | if (f & DOTRIM)
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| 136 | unquote(cp);
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| 137 | *wbp = addword(cp, *wbp);
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| 138 | } else
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| 139 | *wbp = glob(cp, *wbp);
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| 140 | }
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| 141 | quitenv();
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| 142 | } else
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| 143 | gflg = 1;
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| 144 | return(gflg == 0);
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| 145 | }
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| 146 |
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| 147 | /*
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| 148 | * Blank interpretation and quoting
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| 149 | */
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| 150 | static char *
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| 151 | blank(f)
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| 152 | int f;
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| 153 | {
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| 154 | register c, c1;
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| 155 | register char *sp;
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| 156 | int scanequals, foundequals;
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| 157 |
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| 158 | sp = e.linep;
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| 159 | scanequals = f & DOKEY;
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| 160 | foundequals = 0;
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| 161 |
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| 162 | loop:
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| 163 | switch (c = subgetc('"', foundequals)) {
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| 164 | case 0:
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| 165 | if (sp == e.linep)
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| 166 | return(0);
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| 167 | *e.linep++ = 0;
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| 168 | return(sp);
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| 169 |
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| 170 | default:
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| 171 | if (f & DOBLANK && any(c, ifs->value))
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| 172 | goto loop;
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| 173 | break;
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| 174 |
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| 175 | case '"':
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| 176 | case '\'':
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| 177 | scanequals = 0;
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| 178 | if (INSUB())
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| 179 | break;
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| 180 | for (c1 = c; (c = subgetc(c1, 1)) != c1;) {
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| 181 | if (c == 0)
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| 182 | break;
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| 183 | if (c == '\'' || !any(c, "$`\""))
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| 184 | c |= QUOTE;
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| 185 | *e.linep++ = c;
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| 186 | }
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| 187 | c = 0;
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| 188 | }
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| 189 | unget(c);
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| 190 | if (!letter(c))
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| 191 | scanequals = 0;
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| 192 | for (;;) {
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| 193 | c = subgetc('"', foundequals);
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| 194 | if (c == 0 ||
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| 195 | (f & DOBLANK && any(c, ifs->value)) ||
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| 196 | (!INSUB() && any(c, "\"'"))) {
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| 197 | scanequals = 0;
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| 198 | unget(c);
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| 199 | if (any(c, "\"'"))
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| 200 | goto loop;
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| 201 | break;
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| 202 | }
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| 203 | if (scanequals)
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| 204 | if (c == '=') {
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| 205 | foundequals = 1;
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| 206 | scanequals = 0;
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| 207 | }
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| 208 | else if (!letnum(c))
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| 209 | scanequals = 0;
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| 210 | *e.linep++ = c;
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| 211 | }
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| 212 | *e.linep++ = 0;
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| 213 | return(sp);
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| 214 | }
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| 215 |
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| 216 | /*
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| 217 | * Get characters, substituting for ` and $
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| 218 | */
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| 219 | int
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| 220 | subgetc(ec, quoted)
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| 221 | register char ec;
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| 222 | int quoted;
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| 223 | {
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| 224 | register char c;
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| 225 |
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| 226 | again:
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| 227 | c = getc(ec);
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| 228 | if (!INSUB() && ec != '\'') {
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| 229 | if (c == '`') {
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| 230 | if (grave(quoted) == 0)
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| 231 | return(0);
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| 232 | e.iop->task = XGRAVE;
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| 233 | goto again;
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| 234 | }
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| 235 | if (c == '$' && (c = dollar(quoted)) == 0) {
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| 236 | e.iop->task = XDOLL;
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| 237 | goto again;
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| 238 | }
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| 239 | }
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| 240 | return(c);
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| 241 | }
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| 242 |
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| 243 | /*
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| 244 | * Prepare to generate the string returned by ${} substitution.
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| 245 | */
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| 246 | static int
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| 247 | dollar(quoted)
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| 248 | int quoted;
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| 249 | {
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| 250 | int otask;
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| 251 | struct io *oiop;
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| 252 | char *dolp;
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| 253 | register char *s, c, *cp;
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| 254 | struct var *vp;
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| 255 |
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| 256 | c = readc();
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| 257 | s = e.linep;
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| 258 | if (c != '{') {
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| 259 | *e.linep++ = c;
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| 260 | if (letter(c)) {
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| 261 | while ((c = readc())!=0 && letnum(c))
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| 262 | if (e.linep < elinep)
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| 263 | *e.linep++ = c;
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| 264 | unget(c);
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| 265 | }
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| 266 | c = 0;
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| 267 | } else {
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| 268 | oiop = e.iop;
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| 269 | otask = e.iop->task;
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| 270 | e.iop->task = XOTHER;
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| 271 | while ((c = subgetc('"', 0))!=0 && c!='}' && c!='\n')
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| 272 | if (e.linep < elinep)
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| 273 | *e.linep++ = c;
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| 274 | if (oiop == e.iop)
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| 275 | e.iop->task = otask;
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| 276 | if (c != '}') {
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| 277 | err("unclosed ${");
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| 278 | gflg++;
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| 279 | return(c);
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| 280 | }
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| 281 | }
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| 282 | if (e.linep >= elinep) {
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| 283 | err("string in ${} too long");
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| 284 | gflg++;
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| 285 | e.linep -= 10;
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| 286 | }
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| 287 | *e.linep = 0;
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| 288 | if (*s)
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| 289 | for (cp = s+1; *cp; cp++)
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| 290 | if (any(*cp, "=-+?")) {
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| 291 | c = *cp;
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| 292 | *cp++ = 0;
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| 293 | break;
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| 294 | }
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| 295 | if (s[1] == 0 && (*s == '*' || *s == '@')) {
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| 296 | if (dolc > 1) {
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| 297 | /* currently this does not distinguish $* and $@ */
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| 298 | /* should check dollar */
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| 299 | e.linep = s;
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| 300 | PUSHIO(awordlist, dolv+1, dolchar);
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| 301 | return(0);
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| 302 | } else { /* trap the nasty ${=} */
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| 303 | s[0] = '1';
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| 304 | s[1] = 0;
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| 305 | }
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| 306 | }
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| 307 | e.linep = s;
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| 308 | vp = lookup(s);
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| 309 | if ((dolp = vp->value) == null) {
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| 310 | switch (c) {
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| 311 | case '=':
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| 312 | if (digit(*s)) {
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| 313 | err("cannot use ${...=...} with $n");
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| 314 | gflg++;
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| 315 | break;
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| 316 | }
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| 317 | cp = evalstr(strsave(cp, areanum),DOSUB);
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| 318 | setval(vp, cp);
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| 319 | dolp = vp->value;
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| 320 | break;
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| 321 |
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| 322 | case '-':
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| 323 | dolp = evalstr(strsave(cp, areanum),DOSUB);
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| 324 | break;
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| 325 |
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| 326 | case '?':
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| 327 | if (*cp == 0) {
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| 328 | prs("missing value for ");
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| 329 | err(s);
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| 330 | } else
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| 331 | err(evalstr(strsave(cp, areanum),DOSUB));
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| 332 | gflg++;
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| 333 | break;
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| 334 | }
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| 335 | } else if (c == '+') {
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| 336 | dolp = evalstr(strsave(cp, areanum),DOSUB);
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| 337 | }
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| 338 | if (flag['u'] && dolp == null) {
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| 339 | prs("unset variable: ");
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| 340 | err(s);
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| 341 | gflg++;
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| 342 | }
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| 343 | PUSHIO(aword, dolp, quoted ? qstrchar : strchar);
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| 344 | return(0);
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| 345 | }
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| 346 |
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| 347 | /*
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| 348 | * Run the command in `...` and read its output.
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| 349 | */
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| 350 | static int
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| 351 | grave(quoted)
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| 352 | int quoted;
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| 353 | {
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| 354 | int otask;
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| 355 | struct io *oiop;
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| 356 | register char *cp,*s;
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| 357 | register int i,c;
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| 358 | int pf[2];
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| 359 |
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| 360 | c = readc();
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| 361 | s = e.linep;
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| 362 | *e.linep++ = c;
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| 363 | oiop = e.iop;
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| 364 | otask = e.iop->task;
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| 365 | e.iop->task = XOTHER;
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| 366 | while ((c = subgetc('\'', 0))!=0 && c!='`')
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| 367 | if (e.linep < elinep)
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| 368 | *e.linep++ = c;
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| 369 | if (oiop == e.iop)
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| 370 | e.iop->task = otask;
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| 371 | if (c != '`') {
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| 372 | err("no closing `");
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| 373 | return(0);
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| 374 | }
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| 375 | if (openpipe(pf) < 0)
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| 376 | return(0);
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| 377 | if ((i = fork()) == -1) {
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| 378 | closepipe(pf);
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| 379 | err("try again");
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| 380 | return(0);
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| 381 | }
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| 382 | if (i != 0) {
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| 383 | e.linep = s;
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| 384 | close(pf[1]);
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| 385 | PUSHIO(afile, remap(pf[0]), quoted? qgravechar: gravechar);
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| 386 | return(1);
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| 387 | }
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| 388 | *e.linep = 0;
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| 389 | /* allow trapped signals */
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| 390 | for (i=0; i<=_NSIG; i++)
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| 391 | if (ourtrap[i] && signal(i, SIG_IGN) != SIG_IGN)
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| 392 | signal(i, SIG_DFL);
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| 393 | dup2(pf[1], 1);
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| 394 | closepipe(pf);
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| 395 | flag['e'] = 0;
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| 396 | flag['v'] = 0;
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| 397 | flag['n'] = 0;
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| 398 | cp = strsave(e.linep = s, 0);
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| 399 | areanum = 1;
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| 400 | inithere();
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| 401 | freearea(areanum); /* free old space */
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| 402 | e.oenv = NULL;
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| 403 | e.iop = (e.iobase = iostack) - 1;
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| 404 | unquote(cp);
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| 405 | talking = 0;
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| 406 | PUSHIO(aword, cp, nlchar);
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| 407 | onecommand();
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| 408 | exit(1);
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| 409 | }
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| 410 |
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| 411 | char *
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| 412 | unquote(as)
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| 413 | register char *as;
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| 414 | {
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| 415 | register char *s;
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| 416 |
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| 417 | if ((s = as) != NULL)
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| 418 | while (*s)
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| 419 | *s++ &= ~QUOTE;
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| 420 | return(as);
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| 421 | }
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| 422 |
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| 423 | /* -------- glob.c -------- */
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| 424 | /* #include "sh.h" */
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| 425 |
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| 426 | /*
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| 427 | * glob
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| 428 | */
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| 429 |
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| 430 | #define scopy(x) strsave((x), areanum)
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| 431 | #define BLKSIZ 512
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| 432 | #define NDENT ((BLKSIZ+sizeof(struct direct)-1)/sizeof(struct direct))
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| 433 |
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| 434 | static struct wdblock *cl, *nl;
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| 435 | static char spcl[] = "[?*";
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| 436 |
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| 437 | struct wdblock *
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| 438 | glob(cp, wb)
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| 439 | char *cp;
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| 440 | struct wdblock *wb;
|
|---|
| 441 | {
|
|---|
| 442 | register i;
|
|---|
| 443 | register char *pp;
|
|---|
| 444 |
|
|---|
| 445 | if (cp == 0)
|
|---|
| 446 | return(wb);
|
|---|
| 447 | i = 0;
|
|---|
| 448 | for (pp = cp; *pp; pp++)
|
|---|
| 449 | if (any(*pp, spcl))
|
|---|
| 450 | i++;
|
|---|
| 451 | else if (!any(*pp & ~QUOTE, spcl))
|
|---|
| 452 | *pp &= ~QUOTE;
|
|---|
| 453 | if (i != 0) {
|
|---|
| 454 | for (cl = addword(scopy(cp), (struct wdblock *)0); anyspcl(cl); cl = nl) {
|
|---|
| 455 | nl = newword(cl->w_nword*2);
|
|---|
| 456 | for(i=0; i<cl->w_nword; i++) { /* for each argument */
|
|---|
| 457 | for (pp = cl->w_words[i]; *pp; pp++)
|
|---|
| 458 | if (any(*pp, spcl)) {
|
|---|
| 459 | globname(cl->w_words[i], pp);
|
|---|
| 460 | break;
|
|---|
| 461 | }
|
|---|
| 462 | if (*pp == '\0')
|
|---|
| 463 | nl = addword(scopy(cl->w_words[i]), nl);
|
|---|
| 464 | }
|
|---|
| 465 | for(i=0; i<cl->w_nword; i++)
|
|---|
| 466 | DELETE(cl->w_words[i]);
|
|---|
| 467 | DELETE(cl);
|
|---|
| 468 | }
|
|---|
| 469 | for(i=0; i<cl->w_nword; i++)
|
|---|
| 470 | unquote(cl->w_words[i]);
|
|---|
| 471 | glob0((char *)cl->w_words, cl->w_nword, sizeof(char *), xstrcmp);
|
|---|
| 472 | if (cl->w_nword) {
|
|---|
| 473 | for (i=0; i<cl->w_nword; i++)
|
|---|
| 474 | wb = addword(cl->w_words[i], wb);
|
|---|
| 475 | DELETE(cl);
|
|---|
| 476 | return(wb);
|
|---|
| 477 | }
|
|---|
| 478 | }
|
|---|
| 479 | wb = addword(unquote(cp), wb);
|
|---|
| 480 | return(wb);
|
|---|
| 481 | }
|
|---|
| 482 |
|
|---|
| 483 | void
|
|---|
| 484 | globname(we, pp)
|
|---|
| 485 | char *we;
|
|---|
| 486 | register char *pp;
|
|---|
| 487 | {
|
|---|
| 488 | register char *np, *cp;
|
|---|
| 489 | char *name, *gp, *dp;
|
|---|
| 490 | int dn, j, n, k;
|
|---|
| 491 | struct direct ent[NDENT];
|
|---|
| 492 | char dname[NAME_MAX+1];
|
|---|
| 493 | struct stat dbuf;
|
|---|
| 494 |
|
|---|
| 495 | for (np = we; np != pp; pp--)
|
|---|
| 496 | if (pp[-1] == '/')
|
|---|
| 497 | break;
|
|---|
| 498 | for (dp = cp = space((int)(pp-np)+3); np < pp;)
|
|---|
| 499 | *cp++ = *np++;
|
|---|
| 500 | *cp++ = '.';
|
|---|
| 501 | *cp = '\0';
|
|---|
| 502 | for (gp = cp = space(strlen(pp)+1); *np && *np != '/';)
|
|---|
| 503 | *cp++ = *np++;
|
|---|
| 504 | *cp = '\0';
|
|---|
| 505 | dn = open(dp, 0);
|
|---|
| 506 | if (dn < 0) {
|
|---|
| 507 | DELETE(dp);
|
|---|
| 508 | DELETE(gp);
|
|---|
| 509 | return;
|
|---|
| 510 | }
|
|---|
| 511 | dname[NAME_MAX] = '\0';
|
|---|
| 512 | while ((n = read(dn, (char *)ent, sizeof(ent))) >= sizeof(*ent)) {
|
|---|
| 513 | n /= sizeof(*ent);
|
|---|
| 514 | for (j=0; j<n; j++) {
|
|---|
| 515 | if (ent[j].d_ino == 0)
|
|---|
| 516 | continue;
|
|---|
| 517 | strncpy(dname, ent[j].d_name, NAME_MAX);
|
|---|
| 518 | if (dname[0] == '.')
|
|---|
| 519 | if (*gp != '.')
|
|---|
| 520 | continue;
|
|---|
| 521 | for(k=0; k<NAME_MAX; k++)
|
|---|
| 522 | if (any(dname[k], spcl))
|
|---|
| 523 | dname[k] |= QUOTE;
|
|---|
| 524 | if (gmatch(dname, gp)) {
|
|---|
| 525 | name = generate(we, pp, dname, np);
|
|---|
| 526 | if (*np && !anys(np, spcl)) {
|
|---|
| 527 | if (stat(name,&dbuf)) {
|
|---|
| 528 | DELETE(name);
|
|---|
| 529 | continue;
|
|---|
| 530 | }
|
|---|
| 531 | }
|
|---|
| 532 | nl = addword(name, nl);
|
|---|
| 533 | }
|
|---|
| 534 | }
|
|---|
| 535 | }
|
|---|
| 536 | close(dn);
|
|---|
| 537 | DELETE(dp);
|
|---|
| 538 | DELETE(gp);
|
|---|
| 539 | }
|
|---|
| 540 |
|
|---|
| 541 | /*
|
|---|
| 542 | * generate a pathname as below.
|
|---|
| 543 | * start..end1 / middle end
|
|---|
| 544 | * the slashes come for free
|
|---|
| 545 | */
|
|---|
| 546 | static char *
|
|---|
| 547 | generate(start1, end1, middle, end)
|
|---|
| 548 | char *start1;
|
|---|
| 549 | register char *end1;
|
|---|
| 550 | char *middle, *end;
|
|---|
| 551 | {
|
|---|
| 552 | char *p;
|
|---|
| 553 | register char *op, *xp;
|
|---|
| 554 |
|
|---|
| 555 | p = op = space((int)(end1-start1)+strlen(middle)+strlen(end)+2);
|
|---|
| 556 | for (xp = start1; xp != end1;)
|
|---|
| 557 | *op++ = *xp++;
|
|---|
| 558 | for (xp = middle; (*op++ = *xp++) != '\0';)
|
|---|
| 559 | ;
|
|---|
| 560 | op--;
|
|---|
| 561 | for (xp = end; (*op++ = *xp++) != '\0';)
|
|---|
| 562 | ;
|
|---|
| 563 | return(p);
|
|---|
| 564 | }
|
|---|
| 565 |
|
|---|
| 566 | static int
|
|---|
| 567 | anyspcl(wb)
|
|---|
| 568 | register struct wdblock *wb;
|
|---|
| 569 | {
|
|---|
| 570 | register i;
|
|---|
| 571 | register char **wd;
|
|---|
| 572 |
|
|---|
| 573 | wd = wb->w_words;
|
|---|
| 574 | for (i=0; i<wb->w_nword; i++)
|
|---|
| 575 | if (anys(spcl, *wd++))
|
|---|
| 576 | return(1);
|
|---|
| 577 | return(0);
|
|---|
| 578 | }
|
|---|
| 579 |
|
|---|
| 580 | static int
|
|---|
| 581 | xstrcmp(p1, p2)
|
|---|
| 582 | char *p1, *p2;
|
|---|
| 583 | {
|
|---|
| 584 | return(strcmp(*(char **)p1, *(char **)p2));
|
|---|
| 585 | }
|
|---|
| 586 |
|
|---|
| 587 | /* -------- word.c -------- */
|
|---|
| 588 | /* #include "sh.h" */
|
|---|
| 589 | /* #include "word.h" */
|
|---|
| 590 |
|
|---|
| 591 | #define NSTART 16 /* default number of words to allow for initially */
|
|---|
| 592 |
|
|---|
| 593 | struct wdblock *
|
|---|
| 594 | newword(nw)
|
|---|
| 595 | register int nw;
|
|---|
| 596 | {
|
|---|
| 597 | register struct wdblock *wb;
|
|---|
| 598 |
|
|---|
| 599 | wb = (struct wdblock *) space(sizeof(*wb) + nw*sizeof(char *));
|
|---|
| 600 | wb->w_bsize = nw;
|
|---|
| 601 | wb->w_nword = 0;
|
|---|
| 602 | return(wb);
|
|---|
| 603 | }
|
|---|
| 604 |
|
|---|
| 605 | struct wdblock *
|
|---|
| 606 | addword(wd, wb)
|
|---|
| 607 | char *wd;
|
|---|
| 608 | register struct wdblock *wb;
|
|---|
| 609 | {
|
|---|
| 610 | register struct wdblock *wb2;
|
|---|
| 611 | register nw;
|
|---|
| 612 |
|
|---|
| 613 | if (wb == NULL)
|
|---|
| 614 | wb = newword(NSTART);
|
|---|
| 615 | if ((nw = wb->w_nword) >= wb->w_bsize) {
|
|---|
| 616 | wb2 = newword(nw * 2);
|
|---|
| 617 | memcopy((char *)wb2->w_words, (char *)wb->w_words, nw*sizeof(char *));
|
|---|
| 618 | wb2->w_nword = nw;
|
|---|
| 619 | DELETE(wb);
|
|---|
| 620 | wb = wb2;
|
|---|
| 621 | }
|
|---|
| 622 | wb->w_words[wb->w_nword++] = wd;
|
|---|
| 623 | return(wb);
|
|---|
| 624 | }
|
|---|
| 625 |
|
|---|
| 626 | char **
|
|---|
| 627 | getwords(wb)
|
|---|
| 628 | register struct wdblock *wb;
|
|---|
| 629 | {
|
|---|
| 630 | register char **wd;
|
|---|
| 631 | register nb;
|
|---|
| 632 |
|
|---|
| 633 | if (wb == NULL)
|
|---|
| 634 | return((char **)NULL);
|
|---|
| 635 | if (wb->w_nword == 0) {
|
|---|
| 636 | DELETE(wb);
|
|---|
| 637 | return((char **)NULL);
|
|---|
| 638 | }
|
|---|
| 639 | wd = (char **) space(nb = sizeof(*wd) * wb->w_nword);
|
|---|
| 640 | memcopy((char *)wd, (char *)wb->w_words, nb);
|
|---|
| 641 | DELETE(wb); /* perhaps should done by caller */
|
|---|
| 642 | return(wd);
|
|---|
| 643 | }
|
|---|
| 644 |
|
|---|
| 645 | _PROTOTYPE(int (*func), (char *, char *));
|
|---|
| 646 | int globv;
|
|---|
| 647 |
|
|---|
| 648 | void
|
|---|
| 649 | glob0(a0, a1, a2, a3)
|
|---|
| 650 | char *a0;
|
|---|
| 651 | unsigned a1;
|
|---|
| 652 | int a2;
|
|---|
| 653 | _PROTOTYPE(int (*a3), (char *, char *));
|
|---|
| 654 | {
|
|---|
| 655 | func = a3;
|
|---|
| 656 | globv = a2;
|
|---|
| 657 | glob1(a0, a0 + a1 * a2);
|
|---|
| 658 | }
|
|---|
| 659 |
|
|---|
| 660 | void
|
|---|
| 661 | glob1(base, lim)
|
|---|
| 662 | char *base, *lim;
|
|---|
| 663 | {
|
|---|
| 664 | register char *i, *j;
|
|---|
| 665 | int v2;
|
|---|
| 666 | char *lptr, *hptr;
|
|---|
| 667 | int c;
|
|---|
| 668 | unsigned n;
|
|---|
| 669 |
|
|---|
| 670 |
|
|---|
| 671 | v2 = globv;
|
|---|
| 672 |
|
|---|
| 673 | top:
|
|---|
| 674 | if ((n=(int)(lim-base)) <= v2)
|
|---|
| 675 | return;
|
|---|
| 676 | n = v2 * (n / (2*v2));
|
|---|
| 677 | hptr = lptr = base+n;
|
|---|
| 678 | i = base;
|
|---|
| 679 | j = lim-v2;
|
|---|
| 680 | for(;;) {
|
|---|
| 681 | if (i < lptr) {
|
|---|
| 682 | if ((c = (*func)(i, lptr)) == 0) {
|
|---|
| 683 | glob2(i, lptr -= v2);
|
|---|
| 684 | continue;
|
|---|
| 685 | }
|
|---|
| 686 | if (c < 0) {
|
|---|
| 687 | i += v2;
|
|---|
| 688 | continue;
|
|---|
| 689 | }
|
|---|
| 690 | }
|
|---|
| 691 |
|
|---|
| 692 | begin:
|
|---|
| 693 | if (j > hptr) {
|
|---|
| 694 | if ((c = (*func)(hptr, j)) == 0) {
|
|---|
| 695 | glob2(hptr += v2, j);
|
|---|
| 696 | goto begin;
|
|---|
| 697 | }
|
|---|
| 698 | if (c > 0) {
|
|---|
| 699 | if (i == lptr) {
|
|---|
| 700 | glob3(i, hptr += v2, j);
|
|---|
| 701 | i = lptr += v2;
|
|---|
| 702 | goto begin;
|
|---|
| 703 | }
|
|---|
| 704 | glob2(i, j);
|
|---|
| 705 | j -= v2;
|
|---|
| 706 | i += v2;
|
|---|
| 707 | continue;
|
|---|
| 708 | }
|
|---|
| 709 | j -= v2;
|
|---|
| 710 | goto begin;
|
|---|
| 711 | }
|
|---|
| 712 |
|
|---|
| 713 |
|
|---|
| 714 | if (i == lptr) {
|
|---|
| 715 | if (lptr-base >= lim-hptr) {
|
|---|
| 716 | glob1(hptr+v2, lim);
|
|---|
| 717 | lim = lptr;
|
|---|
| 718 | } else {
|
|---|
| 719 | glob1(base, lptr);
|
|---|
| 720 | base = hptr+v2;
|
|---|
| 721 | }
|
|---|
| 722 | goto top;
|
|---|
| 723 | }
|
|---|
| 724 |
|
|---|
| 725 |
|
|---|
| 726 | glob3(j, lptr -= v2, i);
|
|---|
| 727 | j = hptr -= v2;
|
|---|
| 728 | }
|
|---|
| 729 | }
|
|---|
| 730 |
|
|---|
| 731 | void
|
|---|
| 732 | glob2(i, j)
|
|---|
| 733 | char *i, *j;
|
|---|
| 734 | {
|
|---|
| 735 | register char *index1, *index2, c;
|
|---|
| 736 | int m;
|
|---|
| 737 |
|
|---|
| 738 | m = globv;
|
|---|
| 739 | index1 = i;
|
|---|
| 740 | index2 = j;
|
|---|
| 741 | do {
|
|---|
| 742 | c = *index1;
|
|---|
| 743 | *index1++ = *index2;
|
|---|
| 744 | *index2++ = c;
|
|---|
| 745 | } while(--m);
|
|---|
| 746 | }
|
|---|
| 747 |
|
|---|
| 748 | void
|
|---|
| 749 | glob3(i, j, k)
|
|---|
| 750 | char *i, *j, *k;
|
|---|
| 751 | {
|
|---|
| 752 | register char *index1, *index2, *index3;
|
|---|
| 753 | int c;
|
|---|
| 754 | int m;
|
|---|
| 755 |
|
|---|
| 756 | m = globv;
|
|---|
| 757 | index1 = i;
|
|---|
| 758 | index2 = j;
|
|---|
| 759 | index3 = k;
|
|---|
| 760 | do {
|
|---|
| 761 | c = *index1;
|
|---|
| 762 | *index1++ = *index3;
|
|---|
| 763 | *index3++ = *index2;
|
|---|
| 764 | *index2++ = c;
|
|---|
| 765 | } while(--m);
|
|---|
| 766 | }
|
|---|
| 767 |
|
|---|
| 768 | char *
|
|---|
| 769 | memcopy(ato, from, nb)
|
|---|
| 770 | register char *ato, *from;
|
|---|
| 771 | register int nb;
|
|---|
| 772 | {
|
|---|
| 773 | register char *to;
|
|---|
| 774 |
|
|---|
| 775 | to = ato;
|
|---|
| 776 | while (--nb >= 0)
|
|---|
| 777 | *to++ = *from++;
|
|---|
| 778 | return(ato);
|
|---|
| 779 | }
|
|---|
