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// Copyright (c) 1994, 1995 James Clark
// See the file COPYING for copying permission.
#ifdef __GNUG__
#pragma implementation
#endif
#include "splib.h"
#include "StdioStorage.h"
#include "Message.h"
#include "types.h"
#include "ErrnoMessageArg.h"
#include "StringOf.h"
#include "StringC.h"
#include "CodingSystem.h"
#include "StdioStorageMessages.h"
#include <stdio.h>
#include <string.h>
#include <stddef.h>
#include <errno.h>
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
#ifdef SP_NAMESPACE
namespace SP_NAMESPACE {
#endif
class StdioStorageObject : public StorageObject {
public:
StdioStorageObject(FILE *fp, const StringC &filename);
~StdioStorageObject();
Boolean read(char *buf, size_t bufSize, Messenger &mgr, size_t &nread);
Boolean rewind(Messenger &mgr);
size_t getBlockSize() const;
private:
enum ErrorIndex {
invalidErrorIndex,
fopenFailed,
readError,
seekError
};
void error(Messenger &mgr, const MessageType2 &, int err);
FILE *fp_;
StringC filename_;
String<char> filenameBytes_;
};
StdioStorageManager::StdioStorageManager(const char *type,
const CharsetInfo *filenameCharset,
const OutputCodingSystem *filenameCodingSystem)
: IdStorageManager(filenameCharset),
type_(type),
filenameCodingSystem_(filenameCodingSystem)
{
}
StorageObject *StdioStorageManager::makeStorageObject(const StringC &str,
const StringC &,
Boolean,
Boolean,
Messenger &mgr,
StringC &filename)
{
filename = str;
String<char> filenameBytes = filenameCodingSystem_->convertOut(filename);
errno = 0;
FILE *fp = fopen(filenameBytes.data(), "r");
if (!fp) {
ParentLocationMessenger(mgr).message(StdioStorageMessages::openFailed,
StringMessageArg(filename),
ErrnoMessageArg(errno));
return 0;
}
return new StdioStorageObject(fp, filename);
}
const char *StdioStorageManager::type() const
{
return type_;
}
StdioStorageObject::StdioStorageObject(FILE *fp, const StringC &filename)
: fp_(fp), filename_(filename)
{
}
StdioStorageObject::~StdioStorageObject()
{
if (fp_) {
fclose(fp_);
fp_ = 0;
}
}
Boolean StdioStorageObject::rewind(Messenger &mgr)
{
if (fp_) {
errno = 0;
if (fseek(fp_, 0L, SEEK_SET) < 0) {
error(mgr, StdioStorageMessages::seekFailed, errno);
return 0;
}
return 1;
}
return 1;
}
size_t StdioStorageObject::getBlockSize() const
{
return BUFSIZ;
}
Boolean StdioStorageObject::read(char *buf, size_t bufSize, Messenger &mgr,
size_t &nread)
{
if (!fp_)
return 0;
errno = 0;
size_t n = 0;
FILE *fp = fp_;
while (n < bufSize) {
int c = getc(fp);
if (c == EOF) {
if (ferror(fp)) {
error(mgr, StdioStorageMessages::readFailed, errno);
(void)fclose(fp);
return 0;
}
fclose(fp);
fp_ = 0;
break;
}
buf[n++] = c;
}
nread = n;
return n > 0;
}
void StdioStorageObject::error(Messenger &mgr,
const MessageType2 &msg,
int err)
{
ParentLocationMessenger(mgr).message(msg,
StringMessageArg(filename_),
ErrnoMessageArg(err));
}
#ifdef SP_NAMESPACE
}
#endif
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