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#include "DictData.h"
#include "Parser.h"
#include "String.h"
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
@implementation DictData
-init
{
self = [super init];
numChildren = 0;
curObj = 0;
data = malloc(MALLOC_GRANULARITY * sizeof(DataObject *));
if (!data) {
fprintf(stderr, "ERROR: couldn't allocate memory: %s.\n",
strerror(errno));
return nil;
}
return self;
}
-free
{
int i;
fprintf(stderr, "DEBUG: freeing dict\n");
for (i = 0; i < numChildren; i++)
[data[i] free];
free(data);
[super free];
return nil;
}
-addChild: child
{
/* Allocate additional space for children pointers, if required. */
if (numChildren % MALLOC_GRANULARITY == 0) {
/* TODO: fail gracefully. */
data = realloc(data, (numChildren+MALLOC_GRANULARITY) *
sizeof(DictEntry *));
if (!data) {
fprintf(stderr,
"ERROR: couldn't allocate memory: %s.\n",
strerror(errno));
return nil;
}
}
data[numChildren] = child;
numChildren++;
return self;
}
-setFromBuffer: (const char *)buffer withLength: (int)len
{
Parser *parser;
String *string;
const char *offset;
self = [super init];
parser = [Parser new];
string = [[String new] init];
if (parser == nil || string == nil)
return nil;
if (buffer[len] == '\0')
len--;
/* Skip any leading white space. */
for (offset = buffer; offset <= buffer+len && isspace((int)*offset);
offset++);
/* Kill any ending white space. */
for (; len >= 0 && isspace((int)buffer[len]); len--);
/* If there's a leading brace, kill it and the ending one. */
if (offset[0] == '{') {
if (buffer[len] != '}') {
fprintf(stderr, "ERROR: Unbalanced braces.\n");
[parser free]; [string free];
return nil;
}
offset++; len--;
/* Do the whitespace shuffle again. */
for (; len >= 0 && isspace((int)buffer[len]); len--);
}
while (offset < buffer+len) {
DataObject *dataObj;
DictEntry *dictEntry;
String *key;
char *sep;
int strLen;
/* Do the whitespace shuffle. */
for (; offset <= buffer+len && isspace((int)*offset); offset++);
/* Get the key element. */
sep = strchr(offset, '=');
if (!sep) {
fprintf(stderr, "ERROR: No equals sign!\n");
return nil;
}
for (sep--; sep > offset && isspace((int)*sep); sep--);
key = [[[String new] init] setStr: offset
withLength: (sep-offset+1)];
/* Get the data element. */
offset = strchr(offset, '=');
for(offset++; offset < buffer+len && isspace((int)*offset);
offset++);
strLen = [parser getLineLenFrom: offset to: buffer+len];
[string setStr: offset withLength: strLen];
offset += strLen + 1;
/* Parse the data element, then add it to our list. */
dataObj = [parser getDataFrom: string];
if (dataObj == nil) {
fprintf(stderr,
"ERROR: Couldn't parse data for node `%s'.\n",
[key getStr]);
[parser free]; [string free];
return nil;
}
dictEntry = [[DictEntry new] setKey: key];
if (dictEntry == nil) {
fprintf(stderr,
"ERROR: Couldn't create node `%s'.\n",
[key getStr]);
[parser free]; [string free];
return nil;
}
[dictEntry setData: dataObj];
[self addChild: dictEntry];
}
[parser free]; [string free];
return self;
}
-delChild: (const char *)keyName
{
return self;
}
-findChild: (const char *)keyName
{
int i;
for (i = 0; i < numChildren; i++)
if (!strcmp([[data[i] getKey] getStr], keyName))
return data[i];
return nil;
}
-firstObject
{
curObj = 0;
return [self nextObject];
}
-nextObject
{
DictEntry *obj;
if (curObj >= numChildren)
return nil;
obj = data[curObj];
curObj++;
return obj;
}
@end
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