ref: b1d957de163081057eac05c26d502f6c28fc6dc8
dir: /common/id3lib/src/utils.cpp/
// $Id: utils.cpp,v 1.1 2002/01/21 08:16:22 menno Exp $ // id3lib: a C++ library for creating and manipulating id3v1/v2 tags // Copyright 1999, 2000 Scott Thomas Haug // This 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. // // This 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 this library; if not, write to the Free Software Foundation, // Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // The id3lib authors encourage improvements and optimisations to be sent to // the id3lib coordinator. Please see the README file for details on where to // send such submissions. See the AUTHORS file for a list of people who have // contributed to id3lib. See the ChangeLog file for a list of changes to // id3lib. These files are distributed with id3lib at // http://download.sourceforge.net/id3lib/ #include "utils.h" #if defined HAVE_CONFIG_H #include <config.h> #endif #if defined ID3_UNDEFINED namespace id3 { #endif /* ID3_UNDEFINED */ // Extract a 32-bit number from a 4-byte character array uint32 ParseNumber(const uchar *buffer, size_t size) { size_t num = 0; for (size_t nIndex = 0; nIndex < size; nIndex++) { num <<= 8; num |= buffer[nIndex]; } return num; } size_t RenderNumber(uchar *buffer, uint32 val, size_t size) { uint32 num = val; for (size_t i = 0; i < size; i++) { buffer[size - i - 1] = (uchar)(num & MASK8); num >>= 8; } return size; } // converts an ASCII string into a Unicode one void mbstoucs(unicode_t *unicode, const char *ascii, size_t len) { if (NULL != ascii && NULL != unicode) { for (index_t i = 0; i < len; i++) { unicode[i] = ascii[i] & 0xFF; } } } // converts a Unicode string into ASCII void ucstombs(char *ascii, const unicode_t *unicode, size_t len) { if (NULL != unicode && NULL != ascii) { for (index_t i = 0; i < len; i++) { ascii[i] = unicode[i] & 0x00FF; } } } size_t ucslen(const unicode_t *unicode) { if (NULL != unicode) { for (size_t size = 0; true; size++) { if (NULL_UNICODE == unicode[size]) { return size; } } } return 0; } void ucscpy(unicode_t *dest, const unicode_t *src) { if (NULL != dest && NULL != src) { size_t i; for (i = 0; NULL_UNICODE != src[i]; i++) { dest[i] = src[i]; } dest[i] = NULL_UNICODE; } } void ucsncpy(unicode_t *dest, const unicode_t *src, size_t len) { if (NULL != dest && NULL != src) { size_t i; for (i = 0; i < len && NULL_UNICODE != src[i]; i++) { dest[i] = src[i]; } for (; i < len; i++) { dest[i] = NULL_UNICODE; } } } int ucscmp(const unicode_t *s1, const unicode_t *s2) { return ucsncmp(s1, s2, (size_t) -1); } int ucsncmp(const unicode_t *s1, const unicode_t *s2, size_t len) { if (NULL == s1 && NULL == s2) { return 0; } if (NULL == s1) { return 1; } if (NULL == s2) { return -1; } for (size_t i = 0; true; i++) { if ((NULL_UNICODE == s1[i]) || (NULL_UNICODE == s2[i]) || (s1[i] != s2[i]) || (i + 1 == len)) { return s2[i] - s1[i]; } } } #if defined ID3_UNDEFINED } #endif /* ID3_UNDEFINED */