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PGSQLField.m
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PGSQLField.m
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//
// PGSQLField.m
// PGSQLKit
//
// Created by Andy Satori on 6/7/07.
// Copyright 2007 Druware Software Designs. All rights reserved.
//
#import "PGSQLField.h"
#include "libpq-fe.h"
@implementation PGSQLField
-(id)initWithResult:(void *)result forColumn:(PGSQLColumn *)forColumn
atRow:(int)atRow
{
self = [super init];
if (self)
{
data = nil;
// this will default to NSUTF8StringEncoding with PG9
defaultEncoding = NSMacOSRomanStringEncoding;
if (PQgetisnull(result, atRow, [forColumn index]) != 1)
{
char* szBuf = nil;
column = [forColumn retain];
int format = PQfformat(result, [column index]);
int iLen = PQgetlength(result, atRow, [column index]); // Binary
if (format == 0)
{
iLen = PQgetlength(result, atRow, [column index]) + 1; // Text
}
// this may have to be adjust if the column type is not 0 (eg, it's binary)
szBuf = PQgetvalue(result, atRow, [column index]);
if (iLen > 0)
data = [[NSData alloc] initWithBytes:szBuf length:iLen];
}
}
return self;
}
- (void)dealloc
{
[data release];
[column release];
[super dealloc];
}
-(NSString *)asString
{
NSString* result = @"";
if (data != nil)
{
int dataLength = [data length];
if (dataLength > 0)
{
// check for null terminator
char* ptr = (char*)[data bytes];
char lastChar = ptr[dataLength - 1];
if (lastChar == '\0')
dataLength--;
if (dataLength > 0)
result = [[[NSString alloc] initWithBytes:[data bytes] length:dataLength encoding:defaultEncoding] autorelease];
}
}
return result;
}
-(NSString *)asString:(NSStringEncoding)encoding
{
NSString* result = @"";
if (data != nil)
{
int dataLength = [data length];
if (dataLength > 0)
{
// check for null terminator
char* ptr = (char*)[data bytes];
char lastChar = ptr[dataLength - 1];
if (lastChar == '\0')
dataLength--;
if (dataLength > 0)
result = [[[NSString alloc] initWithBytes:[data bytes] length:dataLength encoding:encoding] autorelease];
}
}
return result;
}
-(NSNumber *)asNumber
{
if (data != nil) {
if ([data length] <= 0)
{
return nil;
}
NSString *temp = [[[NSString alloc] initWithBytes:[data bytes] length:[data length] encoding:NSUTF8StringEncoding] autorelease];
NSNumber *value = [[[NSNumber alloc] initWithFloat:[temp floatValue]] autorelease];
return value;
}
return nil;
}
-(long)asLong
{
if (data != nil) {
if ([data length] <= 0)
{
return 0;
}
NSString *value = [[[NSString alloc] initWithBytes:[data bytes] length:[data length] encoding:NSUTF8StringEncoding] autorelease];
return (long)[[NSNumber numberWithFloat:[value floatValue]] longValue];
}
return 0;
}
-(NSDate *)asDate
{
static NSDateFormatter *formatter = nil;
if (formatter == nil) {
formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy'-'MM'-'dd HH':'mm':'ssZZ"];
}
if (data != nil) {
if ([data length] <= 0)
{
return nil;
}
NSString *value = [NSString stringWithCString:(char *)[data bytes]
encoding:NSUTF8StringEncoding];
value = [value stringByAppendingString:@"00"];
NSDate *d = [formatter dateFromString:value];
return d;
}
return nil;
if (data != nil) {
if ([data length] <= 0)
{
return nil;
}
NSString *value = [NSString stringWithCString:(char *)[data bytes]
encoding:NSUTF8StringEncoding];
if ([value rangeOfString:@"."].location != NSNotFound)
{
value = [NSString stringWithFormat:@"%@ +0000", [value substringToIndex:[value rangeOfString:@"."].location]];
} else {
value = [NSString stringWithFormat:@"%@ +0000", value];
}
NSDate *newDate = [[[NSDate alloc] initWithString:value] autorelease];
return newDate;
}
return nil;
}
-(NSData *)asData
{
if (data != nil) {
if ([data length] <= 0)
{
return nil;
}
size_t len;
const unsigned char *unescaped = PQunescapeBytea([data bytes], &len);
return [[[NSData alloc] initWithBytes:unescaped length:len] autorelease];
}
return nil;
}
-(BOOL)asBoolean
{
BOOL result = NO;
if (data != nil)
{
char charResult = *(char*)[data bytes];
result = (charResult == 't');
}
return result;
}
-(BOOL)isNull
{
return (data == nil);
}
-(NSStringEncoding)defaultEncoding
{
return defaultEncoding;
}
-(void)setDefaultEncoding:(NSStringEncoding)value
{
if (defaultEncoding != value) {
defaultEncoding = value;
}
}
@end;