/* * $Id$ */ /* * Harbour Project source code: * The Date API (C level) * * Copyright 1999 David G. Holm * www - http://www.harbour-project.org * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this software; see the file COPYING. If not, write to * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/). * * As a special exception, the Harbour Project gives permission for * additional uses of the text contained in its release of Harbour. * * The exception is that, if you link the Harbour libraries with other * files to produce an executable, this does not by itself cause the * resulting executable to be covered by the GNU General Public License. * Your use of that executable is in no way restricted on account of * linking the Harbour library code into it. * * This exception does not however invalidate any other reasons why * the executable file might be covered by the GNU General Public License. * * This exception applies only to the code released by the Harbour * Project under the name Harbour. If you copy code from other * Harbour Project or Free Software Foundation releases into a copy of * Harbour, as the General Public License permits, the exception does * not apply to the code that you add in this way. To avoid misleading * anyone as to the status of such modified files, you must delete * this exception notice from them. * * If you write modifications of your own for Harbour, it is your choice * whether to permit this exception to apply to your modifications. * If you do not wish that, delete this exception notice. * */ /* * The following parts are Copyright of the individual authors. * www - http://www.harbour-project.org * * Copyright 1999 David G. Holm * hb_dateFormat() * hb_dateUnformat() * * See doc/license.txt for licensing terms. * */ #include #include "hbapi.h" #include "hbdate.h" #include "hbset.h" HB_EXPORT char * hb_dateFormat( const char * szDate, char * szFormattedDate, const char * szDateFormat ) { /* * NOTE: szFormattedDate must point to a buffer of at least 11 bytes. * szDateFormat must point to a buffer holding the date format to use. */ int format_count, digit_count, size; HB_TRACE(HB_TR_DEBUG, ("hb_dateFormat(%s, %p, %s)", szDate, szFormattedDate, szDateFormat)); /* * Determine the maximum size of the formatted date string */ size = strlen( szDateFormat ); if( size > 10 ) size = 10; if( szDate && szFormattedDate && strlen( szDate ) == 8 ) /* A valid date is always 8 characters */ { const char * szPtr; int digit; BOOL used_d, used_m, used_y; format_count = 0; used_d = used_m = used_y = FALSE; szPtr = szDateFormat; while( format_count < size ) { digit = toupper( ( UCHAR ) *szPtr ); szPtr++; digit_count = 1; while( toupper( ( UCHAR ) *szPtr ) == digit && format_count < size ) { szPtr++; if( format_count + digit_count < size ) digit_count++; } switch( digit ) { case 'D': switch( digit_count ) { case 4: if( ! used_d && format_count < size ) { /* szFormattedDate[ format_count++ ] = '0'; */ szFormattedDate[ format_count++ ] = szDate[ 6 ]; digit_count--; } case 3: if( ! used_d && format_count < size ) { /* szFormattedDate[ format_count++ ] = '0'; */ szFormattedDate[ format_count++ ] = szDate[ 6 ]; digit_count--; } case 2: if( ! used_d && format_count < size ) { szFormattedDate[ format_count++ ] = szDate[ 6 ]; digit_count--; } default: if( ! used_d && format_count < size ) { szFormattedDate[ format_count++ ] = szDate[ 7 ]; digit_count--; } while( digit_count-- > 0 && format_count < size ) szFormattedDate[ format_count++ ] = digit; } used_d = TRUE; break; case 'M': switch( digit_count ) { case 4: if( ! used_m && format_count < size ) { /* szFormattedDate[ format_count++ ] = '0'; */ szFormattedDate[ format_count++ ] = szDate[ 4 ]; digit_count--; } case 3: if( ! used_m && format_count < size ) { /* szFormattedDate[ format_count++ ] = '0'; */ szFormattedDate[ format_count++ ] = szDate[ 4 ]; digit_count--; } case 2: if( ! used_m && format_count < size ) { szFormattedDate[ format_count++ ] = szDate[ 4 ]; digit_count--; } default: if( ! used_m && format_count < size ) { szFormattedDate[ format_count++ ] = szDate[ 5 ]; digit_count--; } while( digit_count-- > 0 && format_count < size ) szFormattedDate[ format_count++ ] = digit; } used_m = TRUE; break; case 'Y': switch( digit_count ) { case 4: if( ! used_y && format_count < size ) { szFormattedDate[ format_count++ ] = szDate[ 0 ]; digit_count--; } case 3: if( ! used_y && format_count < size ) { szFormattedDate[ format_count++ ] = szDate[ 1 ]; digit_count--; } case 2: if( ! used_y && format_count < size ) { szFormattedDate[ format_count++ ] = szDate[ 2 ]; digit_count--; } default: if( ! used_y && format_count < size ) { szFormattedDate[ format_count++ ] = szDate[ 3 ]; digit_count--; } while( digit_count-- > 0 && format_count < size ) szFormattedDate[ format_count++ ] = digit; } used_y = TRUE; break; default: while( digit_count-- > 0 && format_count < size ) szFormattedDate[ format_count++ ] = digit; } } } else { /* Not a valid date string, so return a blank date with separators */ format_count = size; /* size is either 8 or 10 */ strncpy( szFormattedDate, szDateFormat, size ); for( digit_count = 0; digit_count < size; digit_count++ ) { switch( szFormattedDate[ digit_count ] ) { case 'D': case 'd': case 'M': case 'm': case 'Y': case 'y': szFormattedDate[ digit_count ] = ' '; } } } szFormattedDate[ format_count ] = '\0'; return szFormattedDate; } HB_EXPORT long hb_dateUnformat( const char * szDate, const char * szDateFormat ) { int d_value = 0, m_value = 0, y_value = 0; if( szDate ) { int d_pos = 0, m_pos = 0, y_pos = 0; int count, digit, non_digit, size; if( ! szDateFormat ) szDateFormat = hb_set.HB_SET_DATEFORMAT; size = strlen( szDateFormat ); for( count = 0; count < size; count++ ) { switch( szDateFormat[ count ] ) { case 'D': case 'd': if( d_pos == 0 ) { if( m_pos == 0 && y_pos == 0 ) d_pos = 1; else if( m_pos == 0 || y_pos == 0 ) d_pos = 2; else d_pos = 3; } break; case 'M': case 'm': if( m_pos == 0 ) { if( d_pos == 0 && y_pos == 0 ) m_pos = 1; else if( d_pos == 0 || y_pos == 0 ) m_pos = 2; else m_pos = 3; } break; case 'Y': case 'y': if( y_pos == 0 ) { if( m_pos == 0 && d_pos == 0 ) y_pos = 1; else if( m_pos == 0 || d_pos == 0 ) y_pos = 2; else y_pos = 3; } } } /* If there are non-digits at the start of the date field, they are not to be treated as date field separators */ non_digit = 1; size = strlen( szDate ); for( count = 0; count < size; count++ ) { digit = szDate[ count ]; if( isdigit( digit ) ) { /* Process the digit for the current date field */ if( d_pos == 1 ) d_value = ( d_value * 10 ) + digit - '0'; else if( m_pos == 1 ) m_value = ( m_value * 10 ) + digit - '0'; else if( y_pos == 1 ) y_value = ( y_value * 10 ) + digit - '0'; /* Treat the next non-digit as a date field separator */ non_digit = 0; } else if( digit != ' ' ) { /* Process the non-digit */ if( non_digit++ == 0 ) { /* Only move to the next date field on the first consecutive non-digit that is encountered */ d_pos--; m_pos--; y_pos--; } } } if( y_value >= 0 && y_value < 100 ) { count = hb_set.HB_SET_EPOCH % 100; digit = hb_set.HB_SET_EPOCH / 100; if( y_value >= count ) y_value += ( digit * 100 ); else y_value += ( ( digit * 100 ) + 100 ); } } return hb_dateEncode( y_value, m_value, d_value ); }