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simplifications.

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This commit is contained in:
Roberto Ierusalimschy 1999-06-23 10:48:39 -03:00
parent 521b38532a
commit 88b65da4d7
1 changed files with 10 additions and 17 deletions
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27
liolib.c
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@ -1,5 +1,5 @@
/* /*
** $Id: liolib.c,v 1.39 1999/05/05 19:22:26 roberto Exp roberto $ ** $Id: liolib.c,v 1.40 1999/05/14 12:24:04 roberto Exp roberto $
** Standard I/O (and system) library ** Standard I/O (and system) library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -157,9 +157,13 @@ static void setfile (FILE *f, char *name, int tag) {
static void setreturn (FILE *f, char *name) { static void setreturn (FILE *f, char *name) {
int tag = gettag(); if (f == NULL)
setfile(f, name, tag); pushresult(0);
lua_pushusertag(f, tag); else {
int tag = gettag();
setfile(f, name, tag);
lua_pushusertag(f, tag);
}
} }
@ -175,10 +179,6 @@ static void io_readfrom (void) {
else { else {
char *s = luaL_check_string(FIRSTARG); char *s = luaL_check_string(FIRSTARG);
current = (*s == '|') ? popen(s+1, "r") : fopen(s, "r"); current = (*s == '|') ? popen(s+1, "r") : fopen(s, "r");
if (current == NULL) {
pushresult(0);
return;
}
} }
setreturn(current, FINPUT); setreturn(current, FINPUT);
} }
@ -196,21 +196,14 @@ static void io_writeto (void) {
else { else {
char *s = luaL_check_string(FIRSTARG); char *s = luaL_check_string(FIRSTARG);
current = (*s == '|') ? popen(s+1,"w") : fopen(s, "w"); current = (*s == '|') ? popen(s+1,"w") : fopen(s, "w");
if (current == NULL) {
pushresult(0);
return;
}
} }
setreturn(current, FOUTPUT); setreturn(current, FOUTPUT);
} }
static void io_appendto (void) { static void io_appendto (void) {
FILE *fp = fopen(luaL_check_string(FIRSTARG), "a"); FILE *current = fopen(luaL_check_string(FIRSTARG), "a");
if (fp != NULL) setreturn(current, FOUTPUT);
setreturn(fp, FOUTPUT);
else
pushresult(0);
} }