/*================================================+
* evaluate_cond -- Evaluate conditional expression
*===============================================*/
BOOLEAN
evaluate_cond (PNODE node, SYMTAB stab, BOOLEAN *eflg)
{
PVALUE val;
BOOLEAN rc;
PNODE var = node, expr = inext(node);
if (!expr) {
expr = var;
var = NULL;
}
if (var && !iistype(var, IIDENT)) {
*eflg = TRUE;
prog_error(node, "1st arg in conditional must be variable");
return FALSE;
}
val = evaluate(expr, stab, eflg);
if (*eflg || !val) {
*eflg = TRUE;
prog_error(node, "error in conditional expression");
return FALSE;
}
#ifdef DEBUG
llwprintf("interp_if: cond = ");
show_pvalue(val);
wprintf("\n");
#endif
if (var) assign_iden(stab, iident(node), copy_pvalue(val));
coerce_pvalue(PBOOL, val, eflg);
rc = pvalue_to_bool(val);
delete_pvalue(val);
return rc;
}
/*====================================+
* evaluate_iden -- Evaluate identifier
* makes & returns copy
*===================================*/
PVALUE
evaluate_iden (PNODE node, SYMTAB stab, BOOLEAN *eflg)
{
STRING iden = (STRING) iident(node);
if (prog_trace)
trace_outl("evaluate_iden called: iden = %s", iden);
*eflg = FALSE;
return valueof_iden(node, stab, iden, eflg);
}
void
filesub(char **namptr, int assign)
{
char *sub = NULL, *str, *ptr;
int len;
filesubstr(namptr, assign);
if (!assign)
return;
if (assign < 3)
if ((*namptr)[1] && (sub = strchr(*namptr + 1, Equals))) {
if (assign == 1)
for (ptr = *namptr; ptr != sub; ptr++)
if (!iident(*ptr) && !INULL(*ptr))
return;
str = sub + 1;
if ((sub[1] == Tilde || sub[1] == Equals) && filesubstr(&str, assign)) {
sub[1] = '\0';
*namptr = dyncat(*namptr, str);
}
} else
return;
ptr = *namptr;
while ((sub = strchr(ptr, ':'))) {
str = sub + 1;
len = sub - *namptr;
if ((sub[1] == Tilde || sub[1] == Equals) && filesubstr(&str, assign)) {
sub[1] = '\0';
*namptr = dyncat(*namptr, str);
}
ptr = *namptr + len + 1;
}
}
/*================================================+
* evaluate_ufunc -- Evaluate user defined function
* node: [in] parsed node of function definition
* stab: [in] function's symbol table
* eflg: [out] error flag
*===============================================*/
PVALUE
evaluate_ufunc (PNODE node, SYMTAB stab, BOOLEAN *eflg)
{
STRING procname = (STRING) iname(node);
PNODE func, arg, parm;
SYMTAB newstab = NULL;
PVALUE val=NULL;
INTERPTYPE irc;
INT count=0;
*eflg = TRUE;
/* find func in local or global table */
func = get_proc_node(procname, irptinfo(node)->functab, gfunctab, &count);
if (!func) {
if (!count)
prog_error(node, _("Undefined func: %s"), procname);
else
prog_error(node, _("Ambiguous call to func: %s"), procname);
goto ufunc_leave;
}
newstab = create_symtab_proc(procname, stab);
arg = (PNODE) iargs(node);
parm = (PNODE) iargs(func);
while (arg && parm) {
BOOLEAN eflg=TRUE;
PVALUE value = evaluate(arg, stab, &eflg);
if (eflg) {
if (getlloptint("FullReportCallStack", 0) > 0)
prog_error(node, "In user function %s()", procname);
return INTERROR;
}
insert_symtab(newstab, iident(parm), value);
arg = inext(arg);
parm = inext(parm);
}
if (arg || parm) {
prog_error(node, "``%s'': mismatched args and params\n", procname);
goto ufunc_leave;
}
irc = interpret((PNODE) ibody(func), newstab, &val);
switch (irc) {
case INTRETURN:
case INTOKAY:
#ifdef DEBUG
llwprintf("Successful ufunc call -- val returned was ");
show_pvalue(val);
llwprintf("\n");
#endif
*eflg = FALSE;
goto ufunc_leave;
case INTBREAK:
case INTCONTINUE:
case INTERROR:
break;
}
if (getlloptint("FullReportCallStack", 0) > 0)
prog_error(node, "In user function %s()", procname);
*eflg = TRUE;
delete_pvalue(val);
val=NULL;
ufunc_leave:
if (newstab) {
remove_symtab(newstab);
newstab = NULL;
}
return val;
}
int
getvisrchstr(void)
{
char *sbuf = halloc(80);
int sptr = 1, ret = 0, ssbuf = 80;
int cmd;
int *obindtab = bindtab;
if (visrchstr) {
zsfree(visrchstr);
visrchstr = NULL;
}
clearlist = 1;
statusline = sbuf;
sbuf[0] = (visrchsense == -1) ? '?' : '/';
bindtab = mainbindtab;
while (sptr) {
sbuf[sptr] = '_';
statusll = sptr + 1;
refresh();
if ((cmd = getkeycmd()) < 0 || cmd == z_sendbreak) {
ret = 0;
break;
}
if(cmd == z_magicspace) {
c = ' ';
cmd = z_selfinsert;
}
switch(cmd) {
case z_redisplay:
redisplay();
break;
case z_clearscreen:
clearscreen();
break;
case z_acceptline:
case z_vicmdmode:
sbuf[sptr] = 0;
visrchstr = metafy(sbuf + 1, sptr - 1, META_DUP);
ret = 1;
sptr = 0;
break;
case z_backwarddeletechar:
case z_vibackwarddeletechar:
sptr--;
break;
case z_backwardkillword:
case z_vibackwardkillword:
while(sptr != 1 && iblank(sbuf[sptr - 1]))
sptr--;
if(iident(sbuf[sptr - 1]))
while(sptr != 1 && iident(sbuf[sptr - 1]))
sptr--;
else
while(sptr != 1 && !iident(sbuf[sptr - 1]) && !iblank(sbuf[sptr - 1]))
sptr--;
break;
case z_sendstring:
sendstring();
break;
case z_viquotedinsert:
sbuf[sptr] = '^';
refresh();
/* fall through */
case z_quotedinsert:
if ((c = getkey(0)) == EOF) {
feep();
break;
}
goto ins;
case z_selfinsertunmeta:
c &= 0x7f;
if(c == '\r')
c = '\n';
case z_selfinsert:
ins:
if(sptr == ssbuf - 1) {
char *newbuf = halloc(ssbuf *= 2);
strcpy(newbuf, sbuf);
statusline = sbuf = newbuf;
}
sbuf[sptr++] = c;
break;
default:
feep();
}
}
statusline = NULL;
bindtab = obindtab;
return ret;
}
static int
gettokstr(int c, int sub)
{
int bct = 0, pct = 0, brct = 0, fdpar = 0;
int intpos = 1, in_brace_param = 0;
int peek, inquote, unmatched = 0;
char endchar='"';
#ifdef DEBUG
int ocmdsp = cmdsp;
#endif
peek = STRING;
if (!sub) {
len = 0;
bptr = tokstr = (char *) hcalloc(bsiz = 32);
}
for (;;) {
int act;
int e;
int inbl = inblank(c);
if (fdpar && !inbl && c != ')')
fdpar = 0;
if (inbl && !in_brace_param && !pct)
act = LX2_BREAK;
else {
act = lexact2[STOUC(c)];
c = lextok2[STOUC(c)];
}
switch (act) {
case LX2_BREAK:
if (!in_brace_param && !sub)
goto brk;
break;
case LX2_META:
c = hgetc();
#ifdef DEBUG
if (lexstop) {
fputs("BUG: input terminated by Meta\n", stderr);
fflush(stderr);
goto brk;
}
#endif
add(Meta);
break;
case LX2_OUTPAR:
if (fdpar) {
/* this is a single word `( )', treat as INOUTPAR */
add(c);
*bptr = '\0';
return INOUTPAR;
}
if ((sub || in_brace_param) && isset(SHGLOB))
break;
if (!in_brace_param && !pct--) {
if (sub) {
pct = 0;
break;
} else
goto brk;
}
c = Outpar;
break;
case LX2_BAR:
if (!pct && !in_brace_param) {
if (sub)
break;
else
goto brk;
}
if (unset(SHGLOB) || (!sub && !in_brace_param))
c = Bar;
break;
case LX2_STRING:
e = hgetc();
if (e == '[') {
cmdpush(CS_MATHSUBST);
add(String);
add(Inbrack);
c = dquote_parse(']', sub);
cmdpop();
if (c) {
peek = LEXERR;
goto brk;
}
c = Outbrack;
} else if (e == '(') {
add(String);
c = cmd_or_math_sub();
if (c) {
peek = LEXERR;
goto brk;
}
c = Outpar;
} else {
if (e == '{') {
add(c);
c = Inbrace;
++bct;
cmdpush(CS_BRACEPAR);
if (!in_brace_param)
in_brace_param = bct;
} else {
hungetc(e);
lexstop = 0;
}
}
break;
case LX2_INBRACK:
if (!in_brace_param)
brct++;
c = Inbrack;
break;
case LX2_OUTBRACK:
if (!in_brace_param)
brct--;
if (brct < 0)
brct = 0;
c = Outbrack;
break;
case LX2_INPAR:
if (isset(SHGLOB)) {
if (sub || in_brace_param)
break;
if (incasepat && !len)
return INPAR;
}
if (!in_brace_param) {
if (!sub) {
e = hgetc();
hungetc(e);
lexstop = 0;
/* For command words, parentheses are only
* special at the start. But now we're tokenising
* the remaining string. So I don't see what
* the old incmdpos test here is for.
* pws 1999/6/8
*
* Oh, no.
* func1( )
* is a valid function definition in [k]sh. The best
* thing we can do, without really nasty lookahead tricks,
* is break if we find a blank after a parenthesis. At
* least this can't happen inside braces or brackets. We
* only allow this with SHGLOB (set for both sh and ksh).
*
* Things like `print @( |foo)' should still
* work, because [k]sh don't allow multiple words
* in a function definition, so we only do this
* in command position.
* pws 1999/6/14
*/
if (e == ')' || (isset(SHGLOB) && inblank(e) && !bct &&
!brct && !intpos && incmdpos))
goto brk;
}
/*
* This also handles the [k]sh `foo( )' function definition.
* Maintain a variable fdpar, set as long as a single set of
* parentheses contains only space. Then if we get to the
* closing parenthesis and it is still set, we can assume we
* have a function definition. Only do this at the start of
* the word, since the (...) must be a separate token.
*/
if (!pct++ && isset(SHGLOB) && intpos && !bct && !brct)
fdpar = 1;
}
c = Inpar;
break;
case LX2_INBRACE:
if (isset(IGNOREBRACES) || sub)
c = '{';
else {
if (!len && incmdpos) {
add('{');
*bptr = '\0';
return STRING;
}
if (in_brace_param) {
cmdpush(CS_BRACE);
}
bct++;
}
break;
case LX2_OUTBRACE:
if ((isset(IGNOREBRACES) || sub) && !in_brace_param)
break;
if (!bct)
break;
if (in_brace_param) {
cmdpop();
}
if (bct-- == in_brace_param)
in_brace_param = 0;
c = Outbrace;
break;
case LX2_COMMA:
if (unset(IGNOREBRACES) && !sub && bct > in_brace_param)
c = Comma;
break;
case LX2_OUTANG:
if (!intpos) {
if (in_brace_param || sub)
break;
else
goto brk;
}
e = hgetc();
if (e != '(') {
hungetc(e);
lexstop = 0;
goto brk;
}
add(Outang);
if (skipcomm()) {
peek = LEXERR;
goto brk;
}
c = Outpar;
break;
case LX2_INANG:
if (isset(SHGLOB) && sub)
break;
e = hgetc();
if(e == '(' && intpos) {
add(Inang);
if (skipcomm()) {
peek = LEXERR;
goto brk;
}
c = Outpar;
break;
}
hungetc(e);
if(isnumglob()) {
add(Inang);
while ((c = hgetc()) != '>')
add(c);
c = Outang;
break;
}
lexstop = 0;
if (in_brace_param || sub)
break;
goto brk;
case LX2_EQUALS:
if (intpos) {
e = hgetc();
if (e != '(') {
hungetc(e);
lexstop = 0;
c = Equals;
} else {
add(Equals);
if (skipcomm()) {
peek = LEXERR;
goto brk;
}
c = Outpar;
}
} else if (!sub && peek != ENVSTRING &&
incmdpos && !bct && !brct) {
char *t = tokstr;
if (idigit(*t))
while (++t < bptr && idigit(*t));
else {
while (iident(*t) && ++t < bptr);
if (t < bptr) {
*bptr = '\0';
skipparens(Inbrack, Outbrack, &t);
}
}
if (*t == '+')
t++;
if (t == bptr) {
e = hgetc();
if (e == '(' && incmdpos) {
*bptr = '\0';
return ENVARRAY;
}
hungetc(e);
lexstop = 0;
peek = ENVSTRING;
intpos = 2;
} else
c = Equals;
} else
c = Equals;
break;
#ifndef __SYMBIAN32__
case LX2_BKSLASH:
c = hgetc();
if (c == '\n') {
c = hgetc();
if (!lexstop)
continue;
} else
add(Bnull);
if (lexstop)
goto brk;
break;
#endif
case LX2_QUOTE: {
int strquote = (len && bptr[-1] == String);
add(Snull);
cmdpush(CS_QUOTE);
for (;;) {
STOPHIST
while ((c = hgetc()) != '\'' && !lexstop) {
if (strquote && c == '\\') {
add(c);
c = hgetc();
if (lexstop)
break;
} else if (!sub && isset(CSHJUNKIEQUOTES) && c == '\n') {
if (bptr[-1] == '\\')
bptr--, len--;
else
break;
}
add(c);
}
ALLOWHIST
if (c != '\'') {
unmatched = '\'';
peek = LEXERR;
cmdpop();
goto brk;
}
e = hgetc();
if (e != '\'' || unset(RCQUOTES) || strquote)
break;
add(c);
}
cmdpop();
hungetc(e);
lexstop = 0;
c = Snull;
break;
}
case LX2_DQUOTE:
add(Dnull);
cmdpush(CS_DQUOTE);
c = dquote_parse('"', sub);
cmdpop();
if (c) {
unmatched = '"';
peek = LEXERR;
goto brk;
}
c = Dnull;
break;
case LX2_BQUOTE:
add(Tick);
cmdpush(CS_BQUOTE);
SETPARBEGIN
inquote = 0;
while ((c = hgetc()) != '`' && !lexstop) {
if (c == '\\') {
c = hgetc();
if (c != '\n') {
add(c == '`' || c == '\\' || c == '$' ? Bnull : '\\');
add(c);
}
else if (!sub && isset(CSHJUNKIEQUOTES))
add(c);
} else {
if (!sub && isset(CSHJUNKIEQUOTES) && c == '\n') {
break;
}
add(c);
if (c == '\'') {
if ((inquote = !inquote))
STOPHIST
else
ALLOWHIST
}
}
}
if (inquote)
ALLOWHIST
cmdpop();
if (c != '`') {
unmatched = '`';
peek = LEXERR;
goto brk;
}
c = Tick;
SETPAREND
break;
}
#ifdef __SYMBIAN32__
if(c=='\\')
{
c = hgetc();
if (c != '\n') {
if (c == endchar)
add(Bnull);
else {
/* lexstop is implicitly handled here */
add('\\');
}
}
}
#endif
add(c);
c = hgetc();
if (intpos)
intpos--;
if (lexstop)
break;
}
brk:
hungetc(c);
if (unmatched)
zerr("unmatched %c", NULL, unmatched);
if (in_brace_param) {
while(bct-- >= in_brace_param)
cmdpop();
zerr("closing brace expected", NULL, 0);
} else if (unset(IGNOREBRACES) && !sub && len > 1 &&
peek == STRING && bptr[-1] == '}' && bptr[-2] != Bnull) {
/* hack to get {foo} command syntax work */
bptr--;
len--;
lexstop = 0;
hungetc('}');
}
*bptr = '\0';
DPUTS(cmdsp != ocmdsp, "BUG: gettok: cmdstack changed.");
return peek;
}