From fea48988ea866e6ef4f29247a13a8b28eb9be7ce Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Mon, 27 Jan 2003 00:16:01 +0000
Subject: [PATCH] * strings.h (strechr): New function. * uinfo.cc
 (pwdgrp::next_str): Search only for input char in string.  Return EOS on
 failure.  Don't check for NULL since it shouldn't be possible.
 (pwdgrp::add_line): Revert to replacing '\n' in input line with '\0'.
 (pwdgrp::next_num): Pass explicit separator character to next_str. * grp.cc
 (pwdgrp::parse_group): Ditto. * passwd.cc (pwdgrp::parse_passwd): Ditto. 
 Revamp test for garbage input. * pwdgrp.h (pwdgrp::next_str): Don't use
 default parameter.

---
 winsup/cygwin/ChangeLog | 13 +++++++++++++
 winsup/cygwin/grp.cc    |  4 ++--
 winsup/cygwin/passwd.cc | 17 ++++++++---------
 winsup/cygwin/pwdgrp.h  |  2 +-
 winsup/cygwin/string.h  | 21 +++++++++++++++++++++
 winsup/cygwin/uinfo.cc  | 23 +++++++++--------------
 6 files changed, 54 insertions(+), 26 deletions(-)

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 7ad151b88..b965d82fa 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,16 @@
+2003-01-26  Christopher Faylor  <cgf@redhat.com>
+
+	* strings.h (strechr): New function.
+	* uinfo.cc (pwdgrp::next_str): Search only for input char in string.
+	Return EOS on failure.  Don't check for NULL since it shouldn't be
+	possible.
+	(pwdgrp::add_line): Revert to replacing '\n' in input line with '\0'.
+	(pwdgrp::next_num): Pass explicit separator character to next_str.
+	* grp.cc (pwdgrp::parse_group): Ditto.
+	* passwd.cc (pwdgrp::parse_passwd): Ditto.  Revamp test for garbage
+	input.
+	* pwdgrp.h (pwdgrp::next_str): Don't use default parameter.
+
 2003-01-26  Christopher Faylor  <cgf@redhat.com>
 
 	* uinfo.cc (pwdgrp::load): Regularize strace output.  Add warning for
diff --git a/winsup/cygwin/grp.cc b/winsup/cygwin/grp.cc
index 44abc9745..35bba1fe2 100644
--- a/winsup/cygwin/grp.cc
+++ b/winsup/cygwin/grp.cc
@@ -37,11 +37,11 @@ bool
 pwdgrp::parse_group ()
 {
 # define grp (*group_buf)[curr_lines]
-  grp.gr_name = next_str ();
+  grp.gr_name = next_str (':');
   if (!*grp.gr_name)
     return false;
 
-  grp.gr_passwd = next_str ();
+  grp.gr_passwd = next_str (':');
 
   if (!next_num (grp.gr_gid))
     return false;
diff --git a/winsup/cygwin/passwd.cc b/winsup/cygwin/passwd.cc
index 113f92acf..c257bd640 100644
--- a/winsup/cygwin/passwd.cc
+++ b/winsup/cygwin/passwd.cc
@@ -38,18 +38,17 @@ bool
 pwdgrp::parse_passwd ()
 {
 # define res (*passwd_buf)[curr_lines]
-  res.pw_name = next_str ();
-  res.pw_passwd = next_str ();
-
-  if (res.pw_name == res.pw_passwd)
-    return false;
-
+  res.pw_name = next_str (':');
+  res.pw_passwd = next_str (':');
+  char *p = raw_ptr ();
   (void) next_num (res.pw_uid);
+  if (p == raw_ptr ())
+    return false;	/* parsing did not advance.  line is garbage */
   (void) next_num (res.pw_gid);
   res.pw_comment = NULL;
-  res.pw_gecos = next_str ();
-  res.pw_dir =  next_str ();
-  res.pw_shell = next_str ();
+  res.pw_gecos = next_str (':');
+  res.pw_dir =  next_str (':');
+  res.pw_shell = next_str (':');
   return true;
 # undef res
 }
diff --git a/winsup/cygwin/pwdgrp.h b/winsup/cygwin/pwdgrp.h
index a5fdc1953..73d41a097 100644
--- a/winsup/cygwin/pwdgrp.h
+++ b/winsup/cygwin/pwdgrp.h
@@ -46,7 +46,7 @@ class pwdgrp
   void read_group ();
   char *add_line (char *);
   char *raw_ptr () const {return lptr;}
-  char *next_str (char = 0);
+  char *next_str (char);
   bool next_num (unsigned long&);
   bool next_num (unsigned int& i)
   {
diff --git a/winsup/cygwin/string.h b/winsup/cygwin/string.h
index 6e410249b..0ac9745ad 100644
--- a/winsup/cygwin/string.h
+++ b/winsup/cygwin/string.h
@@ -38,6 +38,27 @@ strchr (const char *s, int c)
   return res;
 }
 
+#undef strechr
+#define strechr cygwin_strechr
+static inline __stdcall char *
+strechr (const char *s, int c)
+{
+  register char * res;
+  __asm__ __volatile__ ("\
+	movb	%%al,%%ah\n\
+1:	movb	(%1),%%al\n\
+	cmpb	%%ah,%%al\n\
+	je	2f\n\
+	incl	%1\n\
+	testb	%%al,%%al\n\
+	jne	1b\n\
+	decl	%1\n\
+2:	movl	%1,%0\n\
+	":"=a" (res), "=r" (s)
+	:"0" (c), "1" (s));
+  return res;
+}
+
 extern const char isalpha_array[];
 
 #undef strcasematch
diff --git a/winsup/cygwin/uinfo.cc b/winsup/cygwin/uinfo.cc
index 82712d9d4..a6831e2a9 100644
--- a/winsup/cygwin/uinfo.cc
+++ b/winsup/cygwin/uinfo.cc
@@ -394,24 +394,17 @@ cygheap_user::env_name (const char *name, size_t namelen)
 char *
 pwdgrp::next_str (char c)
 {
-  if (!lptr)
-    return NULL;
-  char search[] = ":\n\0\0";
-  search[2] = c;
   char *res = lptr;
-  char *p = strpbrk (lptr, search);
-  if (p)
-    {
-      lptr = (*p == '\n') ? p : p + 1;
-      *p = '\0';
-    }
+  lptr = strechr (lptr, c);
+  if (*lptr)
+    *lptr++ = '\0';
   return res;
 }
 
 bool
 pwdgrp::next_num (unsigned long& n)
 {
-  char *p = next_str ();
+  char *p = next_str (':');
   if (!p)
     return -1;
   char *cp;
@@ -425,11 +418,13 @@ pwdgrp::add_line (char *eptr)
   if (eptr)
     {
       lptr = eptr;
-      eptr = strchr (lptr, '\n');
-      if (eptr)
+      eptr = strechr (lptr, '\n');
+      if (*eptr)
 	{
 	  if (eptr > lptr && eptr[-1] == '\r')
-	    eptr[-1] = '\n';
+	    eptr[-1] = '\0';
+	  else
+	    *eptr = '\0';
 	  eptr++;
 	}
       if (curr_lines >= max_lines)