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#include "mk.h"
static char *vexpand(char*, Envy*, Bufblock*);
static int
getfields(char *str, char **args, int max, int mflag, char *set)
{
Rune r;
int nr, intok, narg;
if(max <= 0)
return 0;
narg = 0;
args[narg] = str;
if(!mflag)
narg++;
intok = 0;
for(;; str += nr) {
nr = chartorune(&r, str);
if(r == 0)
break;
if(utfrune(set, r)) {
if(narg >= max)
break;
*str = 0;
intok = 0;
args[narg] = str + nr;
if(!mflag)
narg++;
} else {
if(!intok && mflag)
narg++;
intok = 1;
}
}
return narg;
}
void
shprint(char *s, Envy *env, Bufblock *buf)
{
int n;
Rune r;
while(*s) {
n = chartorune(&r, s);
if (r == '$')
s = vexpand(s, env, buf);
else {
rinsert(buf, r);
s += n;
s = copyq(s, r, buf); /*handle quoted strings*/
}
}
insert(buf, 0);
}
static char *
mygetenv(char *name, Envy *env)
{
if (!env)
return 0;
if (symlook(name, S_WESET, 0) == 0 && symlook(name, S_INTERNAL, 0) == 0)
return 0;
/* only resolve internal variables and variables we've set */
for(; env->name; env++){
if (strcmp(env->name, name) == 0)
return wtos(env->values, ' ');
}
return 0;
}
static char *
vexpand(char *w, Envy *env, Bufblock *buf)
{
char *s, carry, *p, *q;
assert("vexpand no $", *w == '$');
p = w+1; /* skip dollar sign */
if(*p == '{') {
p++;
q = utfrune(p, '}');
if (!q)
q = strchr(p, 0);
} else
q = shname(p);
carry = *q;
*q = 0;
s = mygetenv(p, env);
*q = carry;
if (carry == '}')
q++;
if (s) {
bufcpy(buf, s, strlen(s));
free(s);
} else /* copy name intact*/
bufcpy(buf, w, q-w);
return(q);
}
void
front(char *s)
{
char *t, *q;
int i, j;
char *flds[512];
q = strdup(s);
i = getfields(q, flds, 512, 0, " \t\n");
if(i > 5){
flds[4] = flds[i-1];
flds[3] = "...";
i = 5;
}
t = s;
for(j = 0; j < i; j++){
for(s = flds[j]; *s; *t++ = *s++);
*t++ = ' ';
}
*t = 0;
free(q);
}
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