/usr/include/poppler/goo/GooHash.h is in libpoppler-dev 0.18.4-1ubuntu3.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// GooHash.h
//
// Copyright 2001-2003 Glyph & Cog, LLC
//
//========================================================================
#ifndef GHASH_H
#define GHASH_H
#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
#include "gtypes.h"
class GooString;
struct GooHashBucket;
struct GooHashIter;
//------------------------------------------------------------------------
class GooHash {
public:
GooHash(GBool deleteKeysA = gFalse);
~GooHash();
void add(GooString *key, void *val);
void add(GooString *key, int val);
void replace(GooString *key, void *val);
void replace(GooString *key, int val);
void *lookup(GooString *key);
int lookupInt(GooString *key);
void *lookup(char *key);
int lookupInt(char *key);
void *remove(GooString *key);
int removeInt(GooString *key);
void *remove(char *key);
int removeInt(char *key);
int getLength() { return len; }
void startIter(GooHashIter **iter);
GBool getNext(GooHashIter **iter, GooString **key, void **val);
GBool getNext(GooHashIter **iter, GooString **key, int *val);
void killIter(GooHashIter **iter);
private:
void expand();
GooHashBucket *find(GooString *key, int *h);
GooHashBucket *find(char *key, int *h);
int hash(GooString *key);
int hash(char *key);
GBool deleteKeys; // set if key strings should be deleted
int size; // number of buckets
int len; // number of entries
GooHashBucket **tab;
};
#define deleteGooHash(hash, T) \
do { \
GooHash *_hash = (hash); \
{ \
GooHashIter *_iter; \
GooString *_key; \
void *_p; \
_hash->startIter(&_iter); \
while (_hash->getNext(&_iter, &_key, &_p)) { \
delete (T*)_p; \
} \
delete _hash; \
} \
} while(0)
#endif
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