From fbb4007ac88656122f9319dea4563a3a4fd40e82 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Sat, 7 Oct 2000 23:37:03 +0000
Subject: Update and simplification.

---
 libc/string/strstr.c | 156 ++++++++++++++++++++++++---------------------------
 1 file changed, 74 insertions(+), 82 deletions(-)

(limited to 'libc/string/strstr.c')

diff --git a/libc/string/strstr.c b/libc/string/strstr.c
index 03d6c8e5f..b1890559b 100644
--- a/libc/string/strstr.c
+++ b/libc/string/strstr.c
@@ -38,88 +38,80 @@ typedef unsigned chartype;
 
 #undef strstr
 
-char *
-strstr (phaystack, pneedle)
-     const char *phaystack;
-     const char *pneedle;
+char *strstr( const char *phaystack, const char *pneedle)
 {
-  register const unsigned char *haystack, *needle;
-  register chartype b, c;
-
-  haystack = (const unsigned char *) phaystack;
-  needle = (const unsigned char *) pneedle;
-
-  b = *needle;
-  if (b != '\0')
-    {
-      haystack--;				/* possible ANSI violation */
-      do
-	{
-	  c = *++haystack;
-	  if (c == '\0')
-	    goto ret0;
+	register const unsigned char *haystack, *needle;
+	register chartype b, c;
+
+	haystack = (const unsigned char *) phaystack;
+	needle = (const unsigned char *) pneedle;
+
+	b = *needle;
+	if (b != '\0') {
+		haystack--;				/* possible ANSI violation */
+		do {
+			c = *++haystack;
+			if (c == '\0')
+				goto ret0;
+		}
+		while (c != b);
+
+		c = *++needle;
+		if (c == '\0')
+			goto foundneedle;
+		++needle;
+		goto jin;
+
+		for (;;) {
+			register chartype a;
+			register const unsigned char *rhaystack, *rneedle;
+
+			do {
+				a = *++haystack;
+				if (a == '\0')
+					goto ret0;
+				if (a == b)
+					break;
+				a = *++haystack;
+				if (a == '\0')
+					goto ret0;
+		  shloop:}
+			while (a != b);
+
+		  jin:a = *++haystack;
+			if (a == '\0')
+				goto ret0;
+
+			if (a != c)
+				goto shloop;
+
+			rhaystack = haystack-- + 1;
+			rneedle = needle;
+			a = *rneedle;
+
+			if (*rhaystack == a)
+				do {
+					if (a == '\0')
+						goto foundneedle;
+					++rhaystack;
+					a = *++needle;
+					if (*rhaystack != a)
+						break;
+					if (a == '\0')
+						goto foundneedle;
+					++rhaystack;
+					a = *++needle;
+				}
+				while (*rhaystack == a);
+
+			needle = rneedle;	/* took the register-poor approach */
+
+			if (a == '\0')
+				break;
+		}
 	}
-      while (c != b);
-
-      c = *++needle;
-      if (c == '\0')
-	goto foundneedle;
-      ++needle;
-      goto jin;
-
-      for (;;)
-        {
-          register chartype a;
-	  register const unsigned char *rhaystack, *rneedle;
-
-	  do
-	    {
-	      a = *++haystack;
-	      if (a == '\0')
-		goto ret0;
-	      if (a == b)
-		break;
-	      a = *++haystack;
-	      if (a == '\0')
-		goto ret0;
-shloop:	    }
-          while (a != b);
-
-jin:	  a = *++haystack;
-	  if (a == '\0')
-	    goto ret0;
-
-	  if (a != c)
-	    goto shloop;
-
-	  rhaystack = haystack-- + 1;
-	  rneedle = needle;
-	  a = *rneedle;
-
-	  if (*rhaystack == a)
-	    do
-	      {
-		if (a == '\0')
-		  goto foundneedle;
-		++rhaystack;
-		a = *++needle;
-		if (*rhaystack != a)
-		  break;
-		if (a == '\0')
-		  goto foundneedle;
-		++rhaystack;
-		a = *++needle;
-	      }
-	    while (*rhaystack == a);
-
-	  needle = rneedle;		/* took the register-poor approach */
-
-	  if (a == '\0')
-	    break;
-        }
-    }
-foundneedle:
-  return (char*) haystack;
-ret0:
-  return 0;
+  foundneedle:
+	return (char *) haystack;
+  ret0:
+	return 0;
 }
-- 
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