| /**************************************************************************** |
| * libs/libc/stdlib/lib_itoa.c |
| * |
| * Copyright (C) 2013 Brooks Automation, Inc. All rights reserved. |
| * Author: Ryan Sundberg <ryan.sundberg@brooks.com> |
| * |
| * This file is a part of NuttX: |
| * |
| * Copyright (C) 2010-2011 Gregory Nutt. All rights reserved. |
| * Author: Gregory Nutt <gnutt@nuttx.org> |
| * |
| * Redistribution and use in 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 in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * 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 <stdlib.h> |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| FAR char *itoa(int val, FAR char *str, int base) |
| { |
| static FAR const char *digits = "0123456789abcdefghijklmnopqrstuvwxyz"; |
| int intval = abs(val); |
| int digit; |
| int pos; |
| int len; |
| FAR char *buf = str; |
| char swap; |
| |
| if (base >= 2 && base <= 36) |
| { |
| do |
| { |
| digit = intval % base; |
| intval = intval / base; |
| *buf++ = digits[digit]; |
| } |
| while (intval > 0); |
| |
| if (val < 0) |
| { |
| *buf++ = '-'; |
| } |
| |
| for (pos = 0, len = buf - str; pos < len / 2; pos++) |
| { |
| swap = str[len - pos - 1]; |
| str[len - pos - 1] = str[pos]; |
| str[pos] = swap; |
| } |
| } |
| |
| *buf = '\0'; |
| |
| return str; |
| } |