Imported Upstream version 93u+upstream

1 files changed, 125 insertions, 0 deletions

diff --git a/src/lib/libast/string/strpsearch.c b/src/lib/libast/string/strpsearch.c
new file mode 100644
index 0000000..69637d5
--- /dev/null
+++ b/src/lib/libast/string/strpsearch.c
@@ -0,0 +1,125 @@
+/***********************************************************************
+*                                                                      *
+*               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
+/*
+ * Glenn Fowler
+ * AT&T Research
+ */
+
+#include <ast.h>
+#include <ccode.h>
+#include <ctype.h>
+
+#if CC_NATIVE == CC_ASCII
+#define MAP(m,c)	(c)
+#else
+#define MAP(m,c)	m[c]
+#endif
+
+/*
+ * return a pointer to the isalpha() identifier matching
+ * name in the CC_ASCII sorted tab of num elements of
+ * size siz where the first member of each
+ * element is a char*
+ *
+ * [xxx] brackets optional identifier characters
+ * * starts optional identifier characters
+ *
+ * 0 returned if name not found
+ * otherwise if next!=0 then it points to the next
+ * unmatched char in name
+ */
+
+void*
+strpsearch(const void* tab, size_t num, size_t siz, const char* name, char** next)
+{
+	register char*		lo = (char*)tab;
+	register char*		hi = lo + (num - 1) * siz;
+	register char*		mid;
+#if CC_NATIVE != CC_ASCII
+	register unsigned char*	m;
+#endif
+	register unsigned char*	s;
+	register unsigned char*	t;
+	register int		c;
+	register int		v;
+	int			sequential = 0;
+
+#if CC_NATIVE != CC_ASCII
+	m = ccmap(CC_NATIVE, CC_ASCII);
+#endif
+	c = MAP(m, *((unsigned char*)name));
+	while (lo <= hi)
+	{
+		mid = lo + (sequential ? 0 : (((hi - lo) / siz) / 2) * siz);
+		if (!(v = c - MAP(m, *(s = *((unsigned char**)mid)))) || *s == '[' && !(v = c - MAP(m, *++s)) && (v = 1))
+		{
+			t = (unsigned char*)name;
+			for (;;)
+			{
+				if (!v && (*s == '[' || *s == '*'))
+				{
+					v = 1;
+					s++;
+				}
+				else if (v && *s == ']')
+				{
+					v = 0;
+					s++;
+				}
+				else if (!isalpha(*t))
+				{
+					if (v || !*s)
+					{
+						if (next)
+							*next = (char*)t;
+						return (void*)mid;
+					}
+					if (!sequential)
+					{
+						while ((mid -= siz) >= lo && (s = *((unsigned char**)mid)) && ((c == MAP(m, *s)) || *s == '[' && c == MAP(m, *(s + 1))));
+						sequential = 1;
+					}
+					v = 1;
+					break;
+				}
+				else if (*t != *s)
+				{
+					v = MAP(m, *t) - MAP(m, *s);
+					break;
+				}
+				else
+				{
+					t++;
+					s++;
+				}
+			}
+		}
+		else if (sequential)
+			break;
+		if (v > 0)
+			lo = mid + siz;
+		else
+			hi = mid - siz;
+	}
+	return 0;
+}