glibc/sysdeps/i386/strtok.S
Ulrich Drepper 6ed0492f8e update from main archvie 961022
Tue Oct 22 21:38:21 1996  Ulrich Drepper  <drepper@cygnus.com>

	* version.h: Bump version number to 1.97.

	* features.h: Undo change of Sun Oct 20 22:19:58 1996.
	Include libc-version.h.
	* features.h.in: Removed.
	* Makefile: Change rules to generate libc-version.h instead of
	features.h.

	* malloc/free.c: Add cast to prevent warning.
	* malloc/malloc-walk.c: Likewise.
	* malloc/ralloc.c: Likewise.
	* malloc/realloc.c: Likewise.

	* grp/fgetgrent_r.c: Accept empty numeric field if name start with +
	or -.
	* pwd/fgetpwent_r.c: Likewise.
	* nss/nss_files/files-grp.c: Don't accept entries with names starting
	with + or - in lookup functions.
	* nss/nss_files/files-pwd.c: Likewise.

	* Makerules: Call autolock.sh using $(SHELL).

Mon Oct 21 22:52:16 1996  NIIBE Yutaka  <gniibe@mri.co.jp>

	* elf/dl-minimal.c: Don't define `dgettext' replacement but
	`dcgettext'.  When optimizing the macros in <libintl.h> define
	`dgettext' as a macro and so this function will never be called.

Mon Oct 21 15:41:59 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/sysdep.h: Define END to use .size when available.
	(PSEUDO_END): Use END.
	* sysdeps/unix/sysv/linux/i386/sysdep.h: Define PSEUDO_END to
	define SYSCALL_ERROR_HANDLER before using END.
	(SYSCALL_ERROR_HANDLER): Don't use .size directive.
	* sysdeps/unix/sysv/linux/clone.S: Don't use SYSCALL_ERROR_HANDLER
	and .size directive but PSEUDO_END.
	* sysdeps/unix/sysv/linux/mmap.S: Likewise.
	* sysdeps/unix/sysv/linux/socket.S: Likewise.
	* sysdeps/unix/sysv/linux/syscall.S: Likewise.
	* sysdeps/unix/sysv/linux/sysdep.S (__errno_location): Use END.
	* sysdeps/unix/i386/sysdep.S (__syscall_error): Likewise.
	* sysdeps/i386/__longjmp.S: Use END instead of PSEUDO_END.
	* sysdeps/i386/bsd-_setjmp.S: Likewise.
	* sysdeps/i386/bsd-setjmp.S: Likewise.
	* sysdeps/i386/memchr.S: Likewise.
	* sysdeps/i386/memcmp.S: Likewise.
	* sysdeps/i386/setjmp.S: Likewise.
	* sysdeps/i386/stpcpy.S: Likewise.
	* sysdeps/i386/stpncpy.S: Likewise.
	* sysdeps/i386/strchr.S: Likewise.
	* sysdeps/i386/strcspn.S: Likewise.
	* sysdeps/i386/strpbrk.S: Likewise.
	* sysdeps/i386/strrchr.S: Likewise.
	* sysdeps/i386/strspn.S: Likewise.
	* sysdeps/i386/strtok.S: Likewise.
	* sysdeps/i386/i486/strcat.S: Likewise.
	* sysdeps/i386/i486/strlen.S: Likewise.
	* sysdeps/i386/i586/memset.S: Likewise.
	* sysdeps/i386/i586/strchr.S: Likewise.
	* sysdeps/i386/i586/strlen.S: Likewise.

	* sysdeps/i386/strlen.c: De-ANSI-fy.

	* sysdeps/generic/_strerror.c: Undo change of Mon Oct 21 01:32:36 1996.
	Define dgettext if not defined to use dcgettext.
	* sysdeps/mach/_strerror.c: Likewise.

	* sysdeps/unix/sysv/i386/time.S: Add PSEUDO_END to get
 	__syscall_error defined..

Sat Oct 19 12:27:50 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/m68k/mmap.S: Fix braino: CALL_MCOUNT is
	already included in the ENTRY macro.  Remove SYSCALL_ERROR_HANDLER
	now provided by PSEUDO_END.
	* sysdeps/unix/sysv/linux/m68k/sigreturn.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/socket.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/syscall.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/clone.S: Likewise.  Use JUMPTARGET.

	* sysdeps/generic/sysdep.h (END): Provide default empty
	definition.
	* sysdeps/unix/sysv/linux/m68k/sysdep.h (END): Redefine to use
	size directive.
	(PSEUDO): Don't include SYSCALL_ERROR_HANDLER.
	(PSEUDO_END): Include it here instead.
	(SYSCALL_ERROR_HANDLER): Remove type directive.
	* sysdeps/m68k/bsd-_setjmp.S: Use END, not PSEUDO_END.
	* sysdeps/m68k/bsd-setjmp.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sigreturn.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise.
	(__syscall_error): Can't use ENTRY macro.

Sat Oct 19 12:13:24 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/syscalls.list (getresuid, setresuid):
	Set caller to EXTRA.

	O_SHLOCK.

Tue Oct 15 14:37:40 1996  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* sysdeps/mach/hurd/fcntlbits.h (O_HURD): Add O_EXLOCK and
1996-10-22 23:29:26 +00:00

286 lines
7.0 KiB
ArmAsm

/* strtok (str, delim) -- Return next DELIM separated token from STR.
For Intel 80x86, x>=3.
Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <sysdep.h>
/* This file can be used for three variants of the strtok function:
strtok:
INPUT PARAMETER:
str (sp + 4)
delim (sp + 8)
strtok_r:
INPUT PARAMETER:
str (sp + 4)
delim (sp + 8)
save_ptr (sp + 12)
We do a common implementation here. */
#ifndef USE_AS_STRTOK_R
.bss
.local save_ptr
ASM_TYPE_DIRECTIVE (save_ptr, @object)
.size save_ptr, 4
save_ptr:
.space 4
#define FUNCTION strtok
#endif
.text
ENTRY (FUNCTION)
movl 4(%esp), %edx /* Get start of string. */
movl 8(%esp), %eax /* Get start of delimiter set. */
#if !defined (USE_AS_STRTOK_R) && defined (PIC)
pushl %ebx /* Save PIC register. */
call Lhere
Lhere: popl %ebx
addl $_GLOBAL_OFFSET_TABLE_+[.-Lhere], %ebx
#endif
/* If the pointer is NULL we have to use the stored value of
the last run. */
cmpl $0, %edx
jne L0
#ifdef USE_AS_STRTOK_R
/* The value is stored in the third argument. */
movl 12(%esp), %edx
movl (%edx), %edx
#else
/* The value is in the local variable defined above. But
we have to take care for PIC code. */
# ifndef PIC
movl save_ptr, %edx
# else
movl save_ptr@GOTOFF(%ebx), %edx
# endif
#endif
L0:
/* First we create a table with flags for all possible characters.
For the ASCII (7bit/8bit) or ISO-8859-X character sets which are
supported by the C string functions we have 256 characters.
Before inserting marks for the stop characters we clear the whole
table. The unrolled form is much faster than a loop. */
xorl %ecx, %ecx /* %ecx = 0 !!! */
pushl %ecx /* make a 256 bytes long block filled with 0 */
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
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pushl %ecx
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pushl %ecx
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pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl $0 /* These immediate values make the label 2 */
pushl $0 /* to be aligned on a 16 byte boundary to */
pushl $0 /* get a better performance of the loop. */
pushl $0
pushl $0
pushl $0
/* For understanding the following code remember that %ecx == 0 now.
Although all the following instruction only modify %cl we always
have a correct zero-extended 32-bit value in %ecx. */
L2: movb (%eax), %cl /* get byte from stopset */
testb %cl, %cl /* is NUL char? */
jz L1 /* yes => start compare loop */
movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
movb 1(%eax), %cl /* get byte from stopset */
testb $0xff, %cl /* is NUL char? */
jz L1 /* yes => start compare loop */
movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
movb 2(%eax), %cl /* get byte from stopset */
testb $0xff, %cl /* is NUL char? */
jz L1 /* yes => start compare loop */
movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
movb 3(%eax), %cl /* get byte from stopset */
addl $4, %eax /* increment stopset pointer */
movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
testb $0xff, %cl /* is NUL char? */
jnz L2 /* no => process next dword from stopset */
L1: leal -4(%edx), %eax /* prepare loop */
/* We use a neat trick for the following loop. Normally we would
have to test for two termination conditions
1. a character in the stopset was found
and
2. the end of the string was found
As a sign that the character is in the stopset we store its
value in the table. The value of NUL is NUL so the loop
terminates for NUL in every case. */
L3: addl $4, %eax /* adjust pointer for full loop round */
movb (%eax), %cl /* get byte from string */
testb %cl, (%esp,%ecx) /* is it contained in stopset? */
jz L4 /* no => start of token */
movb 1(%eax), %cl /* get byte from string */
testb %cl, (%esp,%ecx) /* is it contained in stopset? */
jz L5 /* no => start of token */
movb 2(%eax), %cl /* get byte from string */
testb %cl, (%esp,%ecx) /* is it contained in stopset? */
jz L6 /* no => start of token */
movb 3(%eax), %cl /* get byte from string */
testb %cl, (%esp,%ecx) /* is it contained in stopset? */
jnz L3 /* yes => start of loop */
incl %eax /* adjust pointer */
L6: incl %eax
L5: incl %eax
/* Now we have to terminate the string. */
L4: leal -4(%eax), %edx /* We use %EDX for the next run. */
L7: addl $4, %edx /* adjust pointer for full loop round */
movb (%edx), %cl /* get byte from string */
cmpb %cl, (%esp,%ecx) /* is it contained in skipset? */
je L8 /* yes => return */
movb 1(%edx), %cl /* get byte from string */
cmpb %cl, (%esp,%ecx) /* is it contained in skipset? */
je L9 /* yes => return */
movb 2(%edx), %cl /* get byte from string */
cmpb %cl, (%esp,%ecx) /* is it contained in skipset? */
je L10 /* yes => return */
movb 3(%edx), %cl /* get byte from string */
cmpb %cl, (%esp,%ecx) /* is it contained in skipset? */
jne L7 /* no => start loop again */
incl %edx /* adjust pointer */
L10: incl %edx
L9: incl %edx
L8: /* Remove the stopset table. */
addl $256, %esp
cmpl %eax, %edx
je LreturnNULL /* There was no token anymore. */
movb $0, (%edx) /* Terminate string. */
/* Are we at end of string? */
cmpb $0, %cl
je L11
incl %edx
L11:
/* Store the pointer to the next character. */
#ifdef USE_AS_STRTOK_R
movl 12(%esp), %ecx
movl %edx, (%ecx)
#else
# ifndef PIC
movl %edx, save_ptr
# else
movl %edx, save_ptr@GOTOFF(%ebx)
popl %ebx
# endif
#endif
ret
LreturnNULL:
xorl %eax, %eax
/* Store current pointer for next round. */
#ifdef USE_AS_STRTOK_R
movl 12(%esp), %ecx
movl %edx, (%ecx)
#else
# ifndef PIC
movl %edx, save_ptr
# else
movl %edx, save_ptr@GOTOFF(%ebx)
popl %ebx
# endif
#endif
ret
END (FUNCTION)