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DHxlsReader.m
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DHxlsReader.m
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* This file is part of DHlibxls -- permitting code to read Excel(TM) files.
*
* Copyright 2012 David Hoerl All Rights Reserved.
*
* 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. Only the ObjectiveC code is under this license - separate license may apply to libxls source.
* Read the documents and source headers in the libxls files which you downloaded earlier.
*
* THIS SOFTWARE IS PROVIDED BY David Hoerl ''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 David Hoerl 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.
*/
#import "DHxlsReader.h"
#import "DHcell-Private.h"
#import "xls.h"
#if ! __has_feature(objc_arc)
#error THIS CODE MUST BE COMPILED WITH ARC ENABLED!
#endif
@interface DHxlsReader ()
- (void)setWorkBook:(xlsWorkBook *)wb;
- (void)openSheet:(uint32_t)sheetNum;
- (void)formatContent:(DHcell *)content withCell:(xlsCell *)cell;
@end
@implementation DHxlsReader
{
xlsWorkBook *_workBook;
uint32_t _numSheets;
uint32_t _activeWorkSheetID; // keep last one active
xlsWorkSheet *_activeWorkSheet; // keep last one active
xlsSummaryInfo *_summary;
BOOL _iterating;
uint32_t _lastRowIndex;
uint32_t _lastColIndex;
NSStringEncoding _encoding;
}
+ (DHxlsReader *)xlsReaderWithPath:(NSString *)filePath
{
return [self xlsReaderWithPath:filePath encoding:NSUTF8StringEncoding];
}
+ (DHxlsReader *)xlsReaderWithPath:(NSString *)filePath encoding:(NSStringEncoding)encoding
{
DHxlsReader *reader;
xlsWorkBook *workBook;
// NSLog(@"sizeof FORMULA=%zd LABELSST=%zd", sizeof(FORMULA), sizeof(LABELSST) );
const char *file = [filePath cStringUsingEncoding:encoding];
if((workBook = xls_open(file, "UTF-8"))) {
reader = [DHxlsReader new];
[reader setWorkBook:workBook];
}
return reader;
}
+ (DHxlsReader *)xlsReaderFromFile:(NSString *)filePath
{
return [self xlsReaderWithPath:filePath encoding:NSUTF8StringEncoding];
}
- (id)init
{
if((self = [super init])) {
_activeWorkSheetID = DHWorkSheetNotFound;
_encoding = NSUTF8StringEncoding;
}
return self;
}
- (void)dealloc
{
xls_close_summaryInfo(_summary);
xls_close_WS(_activeWorkSheet);
xls_close_WB(_workBook);
}
- (void)setWorkBook:(xlsWorkBook *)wb
{
_workBook = wb;
xls_parseWorkBook(_workBook);
_numSheets = _workBook->sheets.count;
_summary = xls_summaryInfo(_workBook);
}
- (NSString *)libaryVersion
{
return [NSString stringWithCString:xls_getVersion() encoding:NSASCIIStringEncoding];
}
// Sheet Information
- (uint32_t)numberOfSheets
{
return _numSheets;
}
- (NSString *)sheetNameAtIndex:(uint32_t)idx
{
return idx < _numSheets ? [NSString stringWithCString:(char *)_workBook->sheets.sheet[idx].name encoding:_encoding] : nil;
}
- (uint16_t)rowsForSheetAtIndex:(uint32_t)idx
{
[self openSheet:idx];
NSUInteger numRows = _activeWorkSheet->rows.lastrow + 1;
return idx < _numSheets ? numRows : 0;
}
- (BOOL)isSheetVisibleAtIndex:(NSUInteger)idx
{
return idx < _numSheets ? (BOOL)_workBook->sheets.sheet[idx].visibility : NO;
}
- (void)openSheet:(uint32_t)sheetNum
{
if(sheetNum >= _numSheets) {
_iterating = true;
_lastColIndex = UINT32_MAX;
_lastRowIndex = UINT32_MAX;
} else
if(sheetNum != _activeWorkSheetID) {
_activeWorkSheetID = sheetNum;
xls_close_WS(_activeWorkSheet);
_activeWorkSheet = xls_getWorkSheet(_workBook, sheetNum);
xls_parseWorkSheet(_activeWorkSheet);
}
}
- (uint16_t)numberOfRowsInSheet:(uint32_t)sheetIndex
{
[self openSheet:sheetIndex];
return _activeWorkSheet->rows.lastrow + 1;
}
- (uint16_t)numberOfColsInSheet:(uint32_t)sheetIndex
{
[self openSheet:sheetIndex];
return _activeWorkSheet->rows.lastcol + 1;
}
// Random Access
- (DHcell *)cellInWorkSheetIndex:(uint32_t)sheetNum row:(uint16_t)row col:(uint16_t)col
{
DHcell *content = [DHcell blankCell];
assert(row && col);
[self startIterator:DHWorkSheetNotFound];
[self openSheet:sheetNum];
--row, --col;
NSUInteger numRows = _activeWorkSheet->rows.lastrow + 1;
NSUInteger numCols = _activeWorkSheet->rows.lastcol + 1;
for (NSUInteger t=0; t<numRows; t++)
{
xlsRow *rowP = &_activeWorkSheet->rows.row[t];
for (NSUInteger tt=0; tt<numCols; tt++)
{
xlsCell *cell = &rowP->cells.cell[tt];
// NSLog(@"Looking for %d:%d:%d - testing %d:%d Type: 0x%4.4x [t=%d tt=%d]", sheetNum, row, col, cell->row, cell->col, cell->id, t, tt);
if(cell->row < row) break;
if(cell->row > row) return content;
if(cell->id == 0x201) continue; // "Blank" filler cell created by libxls
if(cell->col == col) {
[self formatContent:content withCell:cell];
return content;
}
}
}
return content;
}
- (DHcell *)cellInWorkSheetIndex:(uint32_t)sheetNum row:(uint16_t)row colStr:(char *)colStr
{
if(strlen(colStr) > 2 || strlen(colStr) == 0) return [DHcell blankCell];
NSInteger col = colStr[0] - 'A';
if(col < 0 || col >= 26) return [DHcell blankCell];
char c = colStr[1];
if(c) {
col *= 26;
NSInteger col2 = c - 'A';
if(col2 < 0 || col2 >= 26) return [DHcell blankCell];
col += col2;
}
col += 1;
return [self cellInWorkSheetIndex:sheetNum row:row col:(uint16_t)col];
}
// Iterate through all cells
- (void)startIterator:(uint32_t)sheetNum
{
if(sheetNum != DHWorkSheetNotFound) {
[self openSheet:sheetNum];
_iterating = true;
_lastColIndex = 0;
_lastRowIndex = 0;
} else {
_iterating = false;
}
}
- (DHcell *)nextCell
{
DHcell *content = [DHcell blankCell];
if(!_iterating) return nil;
NSUInteger numRows = _activeWorkSheet->rows.lastrow + 1;
NSUInteger numCols = _activeWorkSheet->rows.lastcol + 1;
if(_lastRowIndex >= numRows) return content;
for (NSUInteger t=_lastRowIndex; t<numRows; t++)
{
xlsRow *rowP = &_activeWorkSheet->rows.row[t];
for (uint32_t tt=_lastColIndex; tt<numCols; tt++)
{
xlsCell *cell = &rowP->cells.cell[tt];
if(cell->id == 0x201) continue;
_lastColIndex = tt + 1;
[self formatContent:content withCell:cell];
return content;
}
++_lastRowIndex;
_lastColIndex = 0;
}
// don't make iterator false - user can keep asking for cells, they all just be blank ones though
return content;
}
- (void)formatContent:(DHcell *)content withCell:(xlsCell *)cell
{
NSUInteger col = cell->col;
content.row = cell->row + 1;
{
content.col = col + 1;
char colStr[3];
if(col < 26) {
colStr[0] = 'A' + (char)col;
colStr[1] = '\0';
} else {
colStr[0] = 'A' + (char)(col/26);
colStr[1] = 'A' + (char)(col%26);
}
colStr[2] = '\0';
[content setColStr:colStr];
}
switch(cell->id) {
case 0x0006: //FORMULA
// test for formula, if
if(cell->l == 0) {
content.type = cellFloat;
content.val = [NSNumber numberWithDouble:cell->d];
} else {
if(!strcmp((char *)cell->str, "bool")) {
BOOL b = (BOOL)cell->d;
content.type = cellBool;
content.val = [NSNumber numberWithBool:b];
content.str = b ? @"YES" : @"NO";
} else
if(!strcmp((char *)cell->str, "error")) {
// FIXME: Why do we convert the double cell->d to NSInteger?
NSInteger err = (NSInteger)cell->d;
content.type = cellError;
content.val = [NSNumber numberWithInteger:err];
content.str = [NSString stringWithFormat:@"%ld", (long)err];
} else {
content.type = cellString;
}
}
break;
case 0x00FD: //LABELSST
case 0x0204: //LABEL
content.type = cellString;
content.val = [NSNumber numberWithLong:cell->l]; // possible numeric conversion done for you
break;
case 0x0203: //NUMBER
case 0x027E: //RK
content.type = cellFloat;
content.val = [NSNumber numberWithDouble:cell->d];
break;
default:
content.type = cellUnknown;
break;
}
if(!content.str) {
content.str = [NSString stringWithCString:(char *)cell->str encoding:NSUTF8StringEncoding];
}
// NSLog(@"GOING TO PRINT STRING");
// NSLog(@"Cell creator: t=%d num=%@ str=%@", content.type, content.val, content.str);
}
// Summary Information
- (NSString *)appName { return _summary->appName ? [NSString stringWithCString:(char *)_summary->appName encoding:NSUTF8StringEncoding] : @""; }
- (NSString *)author { return _summary->author ? [NSString stringWithCString:(char *)_summary->author encoding:NSUTF8StringEncoding] : @""; }
- (NSString *)category { return _summary->category ? [NSString stringWithCString:(char *)_summary->category encoding:NSUTF8StringEncoding] : @""; }
- (NSString *)comment { return _summary->comment ? [NSString stringWithCString:(char *)_summary->comment encoding:NSUTF8StringEncoding] : @""; }
- (NSString *)company { return _summary->company ? [NSString stringWithCString:(char *)_summary->company encoding:NSUTF8StringEncoding] : @""; }
- (NSString *)keywords { return _summary->keywords ? [NSString stringWithCString:(char *)_summary->keywords encoding:NSUTF8StringEncoding] : @""; }
- (NSString *)lastAuthor { return _summary->lastAuthor? [NSString stringWithCString:(char *)_summary->lastAuthor encoding:NSUTF8StringEncoding] : @""; }
- (NSString *)manager { return _summary->manager ? [NSString stringWithCString:(char *)_summary->manager encoding:NSUTF8StringEncoding] : @""; }
- (NSString *)subject { return _summary->subject ? [NSString stringWithCString:(char *)_summary->subject encoding:NSUTF8StringEncoding] : @""; }
- (NSString *)title { return _summary->title ? [NSString stringWithCString:(char *)_summary->title encoding:NSUTF8StringEncoding] : @""; }
@end