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/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// TODO: add unittests for all these operations
#ifndef SkOSFile_DEFINED
#define SkOSFile_DEFINED
#include <stdio.h>
#include "SkString.h"
enum SkFILE_Flags {
kRead_SkFILE_Flag = 0x01,
kWrite_SkFILE_Flag = 0x02
};
FILE* sk_fopen(const char path[], SkFILE_Flags);
void sk_fclose(FILE*);
size_t sk_fgetsize(FILE*);
size_t sk_fwrite(const void* buffer, size_t byteCount, FILE*);
void sk_fflush(FILE*);
void sk_fsync(FILE*);
size_t sk_ftell(FILE*);
/** Maps a file into memory. Returns the address and length on success, NULL otherwise.
* The mapping is read only.
* When finished with the mapping, free the returned pointer with sk_fmunmap.
*/
void* sk_fmmap(FILE* f, size_t* length);
/** Maps a file descriptor into memory. Returns the address and length on success, NULL otherwise.
* The mapping is read only.
* When finished with the mapping, free the returned pointer with sk_fmunmap.
*/
void* sk_fdmmap(int fd, size_t* length);
/** Unmaps a file previously mapped by sk_fmmap or sk_fdmmap.
* The length parameter must be the same as returned from sk_fmmap.
*/
void sk_fmunmap(const void* addr, size_t length);
/** Returns true if the two point at the exact same filesystem object. */
bool sk_fidentical(FILE* a, FILE* b);
/** Returns the underlying file descriptor for the given file.
* The return value will be < 0 on failure.
*/
int sk_fileno(FILE* f);
/** Returns true if something (file, directory, ???) exists at this path,
* and has the specified access flags.
*/
bool sk_exists(const char *path, SkFILE_Flags = (SkFILE_Flags)0);
// Returns true if a directory exists at this path.
bool sk_isdir(const char *path);
// Like pread, but may affect the file position marker.
// Returns the number of bytes read or SIZE_MAX if failed.
size_t sk_qread(FILE*, void* buffer, size_t count, size_t offset);
// Create a new directory at this path; returns true if successful.
// If the directory already existed, this will return true.
// Description of the error, if any, will be written to stderr.
bool sk_mkdir(const char* path);
class SkOSFile {
public:
class Iter {
public:
Iter();
Iter(const char path[], const char suffix[] = nullptr);
~Iter();
void reset(const char path[], const char suffix[] = nullptr);
/** If getDir is true, only returns directories.
Results are undefined if true and false calls are
interleaved on a single iterator.
*/
bool next(SkString* name, bool getDir = false);
static const size_t kStorageSize = 40;
private:
SkAlignedSStorage<kStorageSize> fSelf;
};
};
#endif
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