[PARSER] Simplify EOF/newline handling in list parser
This patch simplifies the EOF and new handling in the list parser.
In particular, it eliminates a case where we may leave here-documents
unfinished upon EOF.
It also removes special EOF/newline handling from parsecmd.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/ChangeLog b/ChangeLog
index 70ccfed..8e0d276 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
2014-10-28 Herbert Xu <herbert@gondor.apana.org.au>
* Removed unnecessary pungetc on EOF from parser.
+ * Simplify EOF/newline handling in list parser.
2014-10-27 Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/src/parser.c b/src/parser.c
index f0c919d..382ddf2 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -135,19 +135,13 @@
union node *
parsecmd(int interact)
{
- int t;
-
tokpushback = 0;
+ checkkwd = 0;
+ heredoclist = 0;
doprompt = interact;
if (doprompt)
setprompt(doprompt);
needprompt = 0;
- t = readtoken();
- if (t == TEOF)
- return NEOF;
- if (t == TNL)
- return NULL;
- tokpushback++;
return list(1);
}
@@ -158,11 +152,27 @@
union node *n1, *n2, *n3;
int tok;
- checkkwd = CHKNL | CHKKWD | CHKALIAS;
- if (nlflag == 2 && tokendlist[peektoken()])
- return NULL;
n1 = NULL;
for (;;) {
+ switch (peektoken()) {
+ case TNL:
+ if (!(nlflag & 1))
+ break;
+ parseheredoc();
+ return n1;
+
+ case TEOF:
+ if (!n1 && (nlflag & 1))
+ n1 = NEOF;
+ parseheredoc();
+ return n1;
+ }
+
+ checkkwd = CHKNL | CHKKWD | CHKALIAS;
+ if (nlflag == 2 && tokendlist[peektoken()])
+ return n1;
+ nlflag |= 2;
+
n2 = andor();
tok = readtoken();
if (tok == TBACKGND) {
@@ -189,29 +199,15 @@
n1 = n3;
}
switch (tok) {
+ case TNL:
+ case TEOF:
+ tokpushback++;
+ /* fall through */
case TBACKGND:
case TSEMI:
- tok = readtoken();
- /* fall through */
- case TNL:
- if (tok == TNL) {
- parseheredoc();
- if (nlflag == 1)
- return n1;
- } else {
- tokpushback++;
- }
- checkkwd = CHKNL | CHKKWD | CHKALIAS;
- if (tokendlist[peektoken()])
- return n1;
break;
- case TEOF:
- if (heredoclist)
- parseheredoc();
- tokpushback++;
- return n1;
default:
- if (nlflag == 1)
+ if ((nlflag & 1))
synexpect(-1);
tokpushback++;
return n1;
@@ -1443,10 +1439,6 @@
#ifdef mkinit
INCLUDE "parser.h"
-RESET {
- tokpushback = 0;
- checkkwd = 0;
-}
#endif
