summaryrefslogtreecommitdiff
path: root/src/lib/libast/astsa/ast.c
diff options
context:
space:
mode:
authorIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
committerIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
commit3950ffe2a485479f6561c27364d3d7df5a21d124 (patch)
tree468c6e14449d1b1e279222ec32f676b0311917d2 /src/lib/libast/astsa/ast.c
downloadksh-upstream.tar.gz
Imported Upstream version 93u+upstream
Diffstat (limited to 'src/lib/libast/astsa/ast.c')
-rw-r--r--src/lib/libast/astsa/ast.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/src/lib/libast/astsa/ast.c b/src/lib/libast/astsa/ast.c
new file mode 100644
index 0000000..6428ebf
--- /dev/null
+++ b/src/lib/libast/astsa/ast.c
@@ -0,0 +1,85 @@
+/***********************************************************************
+* *
+* This software is part of the ast package *
+* Copyright (c) 1985-2011 AT&T Intellectual Property *
+* and is licensed under the *
+* Eclipse Public License, Version 1.0 *
+* by AT&T Intellectual Property *
+* *
+* A copy of the License is available at *
+* http://www.eclipse.org/org/documents/epl-v10.html *
+* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
+* *
+* Information and Software Systems Research *
+* AT&T Research *
+* Florham Park NJ *
+* *
+* Glenn Fowler <gsf@research.att.com> *
+* David Korn <dgk@research.att.com> *
+* Phong Vo <kpv@research.att.com> *
+* *
+***********************************************************************/
+#pragma prototyped
+/*
+ * standalone mini ast+sfio implementation
+ */
+
+#include <ast.h>
+
+#define CHUNK 1024
+
+_Ast_info_t ast;
+
+int
+astwinsize(int fd, int* lines, int* columns)
+{
+ if (lines)
+ *lines = 24;
+ if (columns)
+ *columns = 80;
+ return 0;
+}
+
+char*
+sfgetr(Sfio_t* sp, int c, int z)
+{
+ register char* s;
+ register char* e;
+
+ static char* buf;
+ static unsigned long siz;
+
+ if (!buf)
+ {
+ siz = CHUNK;
+ if (!(buf = newof(0, char, siz, 0)))
+ return 0;
+ }
+ if (z < 0)
+ return *buf ? buf : (char*)0;
+ s = buf;
+ e = s + siz;
+ for (;;)
+ {
+ if (s >= e)
+ {
+ siz += CHUNK;
+ if (!(buf = newof(buf, char, siz, 0)))
+ return 0;
+ s = buf + (siz - CHUNK);
+ e = s + siz;
+ }
+ if ((c = sfgetc(sp)) == EOF)
+ {
+ *s = 0;
+ return 0;
+ }
+ if (c == '\n')
+ {
+ *s = z ? 0 : c;
+ break;
+ }
+ *s++ = c;
+ }
+ return buf;
+}