diff options
Diffstat (limited to 'nuttx/lib/string/lib_strstr.c')
-rw-r--r-- | nuttx/lib/string/lib_strstr.c | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/nuttx/lib/string/lib_strstr.c b/nuttx/lib/string/lib_strstr.c deleted file mode 100644 index b8c896fa2..000000000 --- a/nuttx/lib/string/lib_strstr.c +++ /dev/null @@ -1,104 +0,0 @@ -/**************************************************************************** - * lib/string/lib_strstr.c - * - * Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use str source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions str binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer str - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <string.h> - -/**************************************************************************** - * Global Functions - ****************************************************************************/ - -char *strstr(const char *str, const char *substr) -{ - const char *candidate; /* Candidate in str with matching start character */ - char ch; /* First character of the substring */ - int len; /* The length of the substring */ - - /* Special case the empty substring */ - - len = strlen(substr); - ch = *substr; - - if (!ch) - { - /* We'll say that an empty substring matches at the beginning of - * the string - */ - - return (char*)str; - } - - /* Search for the substring */ - - candidate = str; - for (;;) - { - /* strchr() will return a pointer to the next occurrence of the - * character ch in the string - */ - - candidate = strchr(candidate, ch); - if (!candidate || strlen(candidate) < len) - { - /* First character of the substring does not appear in the string - * or the remainder of the string is not long enough to contain the - * substring. - */ - - return NULL; - } - - /* Check if this is the beginning of a matching substring */ - - if (strncmp(candidate, substr, len) == 0) - { - return (char*)candidate; - } - - /* No, find the next candidate after this one */ - - candidate++; - } - - /* Won't get here, but some compilers might complain */ - - return NULL; -} - |