mirror of
https://github.com/gnustep/libs-sqlclient.git
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some optimisations
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/sqlclient/trunk@38466 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Richard Frith-MacDonald
parent
fe1d368d66
commit
19a68d1abd
1 changed files with 219 additions and 41 deletions
246
Postgres.m
246
Postgres.m
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@ -41,6 +41,7 @@
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#import <Foundation/NSProcessInfo.h>
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#import <Foundation/NSString.h>
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#import <Foundation/NSThread.h>
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#import <Foundation/NSTimeZone.h>
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#import <Foundation/NSUserDefaults.h>
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#import <Foundation/NSValue.h>
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@ -72,6 +73,8 @@ typedef struct {
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static NSDate *future = nil;
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static NSNull *null = nil;
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static NSTimeZone *zones[47]; // For -23 to +23 hours
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@implementation SQLClientPostgres
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+ (void) initialize
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@ -84,6 +87,10 @@ static NSNull *null = nil;
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[future retain];
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null = [NSNull null];
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[null retain];
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for (int i = -23; i <= 23; i++)
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{
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zones[i + 23] = [[NSTimeZone timeZoneForSecondsFromGMT: i * 60 * 60] retain];
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}
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}
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}
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@ -471,28 +478,13 @@ connectQuote(NSString *str)
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}
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}
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static unsigned int trim(char *str)
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static inline unsigned int trim(char *str, unsigned len)
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{
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char *start = str;
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while (isspace(*str))
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while (len > 0 && isspace(str[len - 1]))
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{
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str++;
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len--;
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}
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if (str != start)
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{
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strcpy(start, str);
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}
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str = start;
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while (*str != '\0')
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{
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str++;
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}
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while (str > start && isspace(str[-1]))
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{
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*--str = '\0';
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}
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return (str - start);
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return len;
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}
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- (char*) parseIntoArray: (NSMutableArray *)a type: (int)t from: (char*)p
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@ -589,7 +581,7 @@ static unsigned int trim(char *str)
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}
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save = *p;
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*p = '\0';
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len = trim(start);
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len = trim(start, p - start);
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if (strcmp(start, "NULL") == 0)
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{
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v = null;
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@ -632,22 +624,24 @@ static unsigned int trim(char *str)
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return p;
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}
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- (id) parseField: (char *)p type: (int)t
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- (id) newParseField: (char *)p type: (int)t size: (int)s
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{
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char arrayType = 0;
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switch (t)
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{
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case 1082: // Date
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return [self dbToDateFromBuffer: p length: trim(p)];
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return [self newDateFromBuffer: p length: trim(p, s)];
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case 1083: // Time (treat as string)
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trim(p);
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return [NSString stringWithUTF8String: p];
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s = trim(p, s);
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return [[NSString alloc] initWithBytes: p
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length: s
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encoding: NSASCIIStringEncoding];
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case 1114: // Timestamp without time zone.
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case 1184: // Timestamp with time zone.
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return [self dbToDateFromBuffer: p length: trim(p)];
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return [self newDateFromBuffer: p length: trim(p, s)];
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case 16: // BOOL
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if (*p == 't')
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@ -660,16 +654,20 @@ static unsigned int trim(char *str)
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}
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case 17: // BYTEA
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return [self dataFromBLOB: p];
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return [[self dataFromBLOB: p] retain];
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case 18: // "char"
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return [NSString stringWithUTF8String: p];
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return [[NSString alloc] initWithBytes: p
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length: s
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encoding: NSUTF8StringEncoding];
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case 20: // INT8
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case 21: // INT2
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case 23: // INT4
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trim(p);
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return [NSString stringWithUTF8String: p];
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s = trim(p, s);
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return [[NSString alloc] initWithBytes: p
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length: s
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encoding: NSASCIIStringEncoding];
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break;
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case 1182: // DATE ARRAY
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@ -693,7 +691,7 @@ static unsigned int trim(char *str)
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{
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NSMutableArray *a;
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a = [NSMutableArray arrayWithCapacity: 10];
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a = [[NSMutableArray alloc] initWithCapacity: 10];
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p = [self parseIntoArray: a type: arrayType from: p];
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if ([self debugging] > 2)
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{
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@ -706,9 +704,11 @@ static unsigned int trim(char *str)
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default:
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if (YES == _shouldTrim)
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{
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trim(p);
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s = trim(p, s);
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}
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return [NSString stringWithUTF8String: p];
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return [[NSString alloc] initWithBytes: p
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length: s
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encoding: NSUTF8StringEncoding];
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}
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}
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@ -773,6 +773,7 @@ static unsigned int trim(char *str)
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int fmod[fieldCount];
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int fformat[fieldCount];
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SQLRecordKeys *k = nil;
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int d = [self debugging];
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int i;
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for (i = 0; i < fieldCount; i++)
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@ -784,6 +785,20 @@ static unsigned int trim(char *str)
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}
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records = [[ltype alloc] initWithCapacity: recordCount];
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/* Create buffers to store the previous row from the
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* database and the previous objc values.
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*/
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int len[fieldCount];
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const char *ptr[fieldCount];
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id obj[fieldCount];
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for (i = 0; i < fieldCount; i++)
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{
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len[i] = -1;
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obj[i] = nil;
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}
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for (i = 0; i < recordCount; i++)
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{
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SQLRecord *record;
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@ -799,14 +814,27 @@ static unsigned int trim(char *str)
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char *p = PQgetvalue(result, i, j);
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int size = PQgetlength(result, i, j);
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if ([self debugging] > 1)
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if (d > 1)
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{
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[self debug: @"%@ type:%d mod:%d size: %d\n",
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keys[j], ftype[j], fmod[j], size];
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}
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/* Often many rows will contain the same data in
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* one or more columns, so we check to see if the
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* value we have just read is small and identical
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* to the value in the same column of the previous
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* row. Only if it isn't do we create a new object.
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*/
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if (size != len[j] || size > 20
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|| memcmp(p, ptr[j], (size_t)len) != 0)
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{
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[obj[j] release];
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if (fformat[j] == 0) // Text
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{
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v = [self parseField: p type: ftype[j]];
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v = [self newParseField: p
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type: ftype[j]
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size: size];
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obj[j] = v;
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}
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else // Binary
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{
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@ -815,6 +843,7 @@ static unsigned int trim(char *str)
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keys[j], ftype[j], fmod[j], size);
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}
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}
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}
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values[j] = v;
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}
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if (nil == k)
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@ -839,6 +868,10 @@ static unsigned int trim(char *str)
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[records addObject: record];
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[record release];
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}
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for (i = 0; i < fieldCount; i++)
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{
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[obj[i] release];
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}
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}
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else if (PQresultStatus(result) == PGRES_COMMAND_OK)
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{
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@ -1196,6 +1229,151 @@ static unsigned int trim(char *str)
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return d;
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}
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- (NSDate*) newDateFromBuffer: (char*)b length: (int)l
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{
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NSCalendarDate *d;
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NSTimeZone *zone;
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int milliseconds = 0;
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int timezone = 0;
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int day;
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int month;
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int year;
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int hour;
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int minute;
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int second;
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int i;
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i = 0;
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if (i >= l || !isdigit(b[i])) return nil;
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year = b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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year = year * 10 + b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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year = year * 10 + b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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year = year * 10 + b[i++] - '0';
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if (i >= l || b[i++] != '-') return nil;
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if (i >= l || !isdigit(b[i])) return nil;
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month = b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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month = month * 10 + b[i++] - '0';
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if (month < 1 || month > 12) return nil;
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if (i >= l || b[i++] != '-') return nil;
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if (i >= l || !isdigit(b[i])) return nil;
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day = b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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day = day * 10 + b[i++] - '0';
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if (day < 1 || day > 31) return nil;
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if (i == l)
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{
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hour = 0;
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minute = 0;
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second = 0;
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}
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else
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{
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if (i >= l || b[i++] != ' ') return nil;
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if (i >= l || !isdigit(b[i])) return nil;
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hour = b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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hour = hour * 10 + b[i++] - '0';
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if (hour < 0 || hour > 23) return nil;
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if (i >= l || b[i++] != ':') return nil;
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if (i >= l || !isdigit(b[i])) return nil;
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minute = b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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minute = minute * 10 + b[i++] - '0';
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if (minute < 0 || minute > 59) return nil;
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if (i >= l || b[i++] != ':') return nil;
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if (i >= l || !isdigit(b[i])) return nil;
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second = b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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second = second * 10 + b[i++] - '0';
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if (second < 0 || second > 60) return nil;
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if (i < l && '.' == b[i])
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{
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i++;
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if (i >= l || !isdigit(b[i])) return nil;
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milliseconds = b[i++] - '0';
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milliseconds *=- 10;
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if (i < l && isdigit(b[i]))
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milliseconds += b[i++] - '0';
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milliseconds *=- 10;
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if (i < l && isdigit(b[i]))
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milliseconds += b[i++] - '0';
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while (i < l && isdigit(b[i]))
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i++;
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}
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if (i < l && ('+' == b[i] || '-' == b[i]))
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{
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char sign = b[i++];
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if (i >= l || !isdigit(b[i])) return nil;
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timezone = b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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timezone = timezone * 10 + b[i++] - '0';
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if (timezone < 0 || timezone > 23) return nil;
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timezone *= 60; // Convert to minutes
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if (i < l && ':' == b[i])
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{
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int tzmin;
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if (i >= l || !isdigit(b[i])) return nil;
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tzmin = b[i++] - '0';
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if (i >= l || !isdigit(b[i])) return nil;
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tzmin = tzmin * 10 + b[i++] - '0';
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if (tzmin < 0 || tzmin > 59) return nil;
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timezone += tzmin;
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}
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if ('-' == sign)
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timezone = -timezone;
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}
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}
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if (timezone % 60 == 0)
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{
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zone = zones[timezone / 60];
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}
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else
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{
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zone = [NSTimeZone timeZoneForSecondsFromGMT: timezone * 60];
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}
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d = [[NSCalendarDate alloc] initWithYear: year
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month: month
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day: day
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hour: hour
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minute: minute
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second: second
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timeZone: zone];
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if (milliseconds > 0)
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{
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NSTimeInterval ti;
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ti = milliseconds;
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ti /= 1000.0;
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ti += [d timeIntervalSinceReferenceDate];
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d = [d initWithTimeIntervalSinceReferenceDate: ti];
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[d setTimeZone: zone];
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}
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[d setCalendarFormat: @"%Y-%m-%d %H:%M:%S %z"];
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return d;
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}
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- (void) dealloc
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{
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if (extra != 0)
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