sh: Various cleanups to expand.c:
* Remove some gotos. * Remove unused parameter. * Remove duplicate code.
This commit is contained in:
Jilles Tjoelker
parent
a63352afc0
commit
7034d8df04
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=278826
115
bin/sh/expand.c
115
bin/sh/expand.c
@ -105,11 +105,12 @@ static void expbackq(union node *, int, int);
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static int subevalvar(char *, char *, int, int, int, int, int);
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static char *evalvar(char *, int);
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static int varisset(const char *, int);
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static void strtodest(const char *, int, int, int);
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static void varvalue(const char *, int, int, int);
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static void recordregion(int, int, int);
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static void removerecordregions(int);
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static void ifsbreakup(char *, struct arglist *);
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static void expandmeta(struct strlist *, int);
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static void expandmeta(struct strlist *);
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static void expmeta(char *, char *);
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static void addfname(char *);
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static struct strlist *expsort(struct strlist *);
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@ -175,7 +176,7 @@ expandarg(union node *arg, struct arglist *arglist, int flag)
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ifsbreakup(p, &exparg);
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*exparg.lastp = NULL;
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exparg.lastp = &exparg.list;
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expandmeta(exparg.list, flag);
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expandmeta(exparg.list);
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} else {
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sp = (struct strlist *)stalloc(sizeof (struct strlist));
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sp->text = p;
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@ -298,9 +299,9 @@ exptilde(char *p, int flag)
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char c, *startp = p;
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struct passwd *pw;
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char *home;
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int quotes = flag & (EXP_FULL | EXP_CASE);
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while ((c = *p) != '\0') {
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for (;;) {
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c = *p;
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switch(c) {
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case CTLESC: /* This means CTL* are always considered quoted. */
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case CTLVAR:
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@ -311,31 +312,27 @@ exptilde(char *p, int flag)
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case CTLQUOTEMARK:
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return (startp);
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case ':':
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if (flag & EXP_VARTILDE)
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goto done;
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break;
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if ((flag & EXP_VARTILDE) == 0)
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break;
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/* FALLTHROUGH */
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case '\0':
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case '/':
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case CTLENDVAR:
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goto done;
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*p = '\0';
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if (*(startp+1) == '\0') {
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home = lookupvar("HOME");
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} else {
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pw = getpwnam(startp+1);
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home = pw != NULL ? pw->pw_dir : NULL;
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}
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*p = c;
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if (home == NULL || *home == '\0')
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return (startp);
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strtodest(home, flag, VSNORMAL, 1);
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return (p);
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}
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p++;
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}
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done:
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*p = '\0';
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if (*(startp+1) == '\0') {
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home = lookupvar("HOME");
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} else {
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pw = getpwnam(startp+1);
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home = pw != NULL ? pw->pw_dir : NULL;
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}
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*p = c;
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if (home == NULL || *home == '\0')
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return (startp);
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if (quotes)
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STPUTS_QUOTES(home, DQSYNTAX, expdest);
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else
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STPUTS(home, expdest);
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return (p);
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}
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@ -496,6 +493,17 @@ expbackq(union node *cmd, int quoted, int flag)
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static void
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recordleft(const char *str, const char *loc, char *startp)
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{
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int amount;
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amount = ((str - 1) - (loc - startp)) - expdest;
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STADJUST(amount, expdest);
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while (loc != str - 1)
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*startp++ = *loc++;
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}
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static int
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subevalvar(char *p, char *str, int strloc, int subtype, int startloc,
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int varflags, int quotes)
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@ -539,7 +547,8 @@ subevalvar(char *p, char *str, int strloc, int subtype, int startloc,
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*loc = '\0';
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if (patmatch(str, startp, quotes)) {
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*loc = c;
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goto recordleft;
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recordleft(str, loc, startp);
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return 1;
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}
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*loc = c;
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if (quotes && *loc == CTLESC)
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@ -553,7 +562,8 @@ subevalvar(char *p, char *str, int strloc, int subtype, int startloc,
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*loc = '\0';
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if (patmatch(str, startp, quotes)) {
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*loc = c;
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goto recordleft;
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recordleft(str, loc, startp);
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return 1;
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}
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*loc = c;
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loc--;
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@ -601,13 +611,6 @@ subevalvar(char *p, char *str, int strloc, int subtype, int startloc,
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default:
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abort();
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}
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recordleft:
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amount = ((str - 1) - (loc - startp)) - expdest;
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STADJUST(amount, expdest);
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while (loc != str - 1)
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*startp++ = *loc++;
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return 1;
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}
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@ -632,6 +635,7 @@ evalvar(char *p, int flag)
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int varlenb;
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int easy;
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int quotes = flag & (EXP_FULL | EXP_CASE);
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int record;
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varflags = (unsigned char)*p++;
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subtype = varflags & VSTYPE;
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@ -689,22 +693,15 @@ evalvar(char *p, int flag)
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STADJUST(-varlenb, expdest);
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}
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} else {
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char const *syntax = (varflags & VSQUOTE) ? DQSYNTAX
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: BASESYNTAX;
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if (subtype == VSLENGTH) {
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for (;*val; val++)
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if (!localeisutf8 ||
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(*val & 0xC0) != 0x80)
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varlen++;
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}
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else {
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if (quotes)
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STPUTS_QUOTES(val, syntax, expdest);
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else
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STPUTS(val, expdest);
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}
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else
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strtodest(val, flag, subtype,
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varflags & VSQUOTE);
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}
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}
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@ -718,15 +715,11 @@ evalvar(char *p, int flag)
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switch (subtype) {
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case VSLENGTH:
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expdest = cvtnum(varlen, expdest);
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goto record;
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record = 1;
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break;
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case VSNORMAL:
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if (!easy)
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break;
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record:
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recordregion(startloc, expdest - stackblock(),
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varflags & VSQUOTE || (ifsset() && ifsval()[0] == '\0' &&
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(*var == '@' || *var == '*')));
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record = easy;
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break;
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case VSPLUS:
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@ -736,8 +729,7 @@ evalvar(char *p, int flag)
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(varflags & VSQUOTE ? EXP_LIT_QUOTED : 0));
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break;
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}
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if (easy)
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goto record;
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record = easy;
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break;
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case VSTRIMLEFT:
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@ -759,7 +751,8 @@ evalvar(char *p, int flag)
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}
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/* Remove any recorded regions beyond start of variable */
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removerecordregions(startloc);
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goto record;
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record = 1;
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break;
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case VSASSIGN:
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case VSQUESTION:
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@ -776,8 +769,7 @@ evalvar(char *p, int flag)
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}
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break;
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}
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if (easy)
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goto record;
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record = easy;
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break;
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case VSERROR:
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@ -789,6 +781,11 @@ evalvar(char *p, int flag)
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abort();
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}
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if (record)
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recordregion(startloc, expdest - stackblock(),
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varflags & VSQUOTE || (ifsset() && ifsval()[0] == '\0' &&
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(*var == '@' || *var == '*')));
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if (subtype != VSNORMAL) { /* skip to end of alternative */
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int nesting = 1;
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for (;;) {
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@ -1092,7 +1089,7 @@ static char expdir[PATH_MAX];
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* The results are stored in the list exparg.
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*/
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static void
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expandmeta(struct strlist *str, int flag __unused)
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expandmeta(struct strlist *str)
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{
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char *p;
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struct strlist **savelastp;
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@ -1474,16 +1471,14 @@ patmatch(const char *pattern, const char *string, int squoted)
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endp = p;
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if (*endp == '!' || *endp == '^')
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endp++;
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for (;;) {
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do {
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while (*endp == CTLQUOTEMARK)
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endp++;
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if (*endp == 0)
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goto dft; /* no matching ] */
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if (*endp == CTLESC)
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endp++;
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if (*++endp == ']')
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break;
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}
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} while (*++endp != ']');
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invert = 0;
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if (*p == '!' || *p == '^') {
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invert++;
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