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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /stdlib/getenv.c
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'stdlib/getenv.c')
-rw-r--r--stdlib/getenv.c98
1 files changed, 0 insertions, 98 deletions
diff --git a/stdlib/getenv.c b/stdlib/getenv.c
deleted file mode 100644
index 6cdfe2b266..0000000000
--- a/stdlib/getenv.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/* Copyright (C) 1991,92,94,96,98,99,2002,2005 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <endian.h>
-#include <errno.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-/* Return the value of the environment variable NAME. This implementation
- is tuned a bit in that it assumes no environment variable has an empty
- name which of course should always be true. We have a special case for
- one character names so that for the general case we can assume at least
- two characters which we can access. By doing this we can avoid using the
- `strncmp' most of the time. */
-char *
-getenv (name)
- const char *name;
-{
- size_t len = strlen (name);
- char **ep;
- uint16_t name_start;
-
- if (__environ == NULL || name[0] == '\0')
- return NULL;
-
- if (name[1] == '\0')
- {
- /* The name of the variable consists of only one character. Therefore
- the first two characters of the environment entry are this character
- and a '=' character. */
-#if __BYTE_ORDER == __LITTLE_ENDIAN || !_STRING_ARCH_unaligned
- name_start = ('=' << 8) | *(const unsigned char *) name;
-#else
-# if __BYTE_ORDER == __BIG_ENDIAN
- name_start = '=' | ((*(const unsigned char *) name) << 8);
-# else
- #error "Funny byte order."
-# endif
-#endif
- for (ep = __environ; *ep != NULL; ++ep)
- {
-#if _STRING_ARCH_unaligned
- uint16_t ep_start = *(uint16_t *) *ep;
-#else
- uint16_t ep_start = (((unsigned char *) *ep)[0]
- | (((unsigned char *) *ep)[1] << 8));
-#endif
- if (name_start == ep_start)
- return &(*ep)[2];
- }
- }
- else
- {
-#if _STRING_ARCH_unaligned
- name_start = *(const uint16_t *) name;
-#else
- name_start = (((const unsigned char *) name)[0]
- | (((const unsigned char *) name)[1] << 8));
-#endif
- len -= 2;
- name += 2;
-
- for (ep = __environ; *ep != NULL; ++ep)
- {
-#if _STRING_ARCH_unaligned
- uint16_t ep_start = *(uint16_t *) *ep;
-#else
- uint16_t ep_start = (((unsigned char *) *ep)[0]
- | (((unsigned char *) *ep)[1] << 8));
-#endif
-
- if (name_start == ep_start && !strncmp (*ep + 2, name, len)
- && (*ep)[len + 2] == '=')
- return &(*ep)[len + 3];
- }
- }
-
- return NULL;
-}
-libc_hidden_def (getenv)