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Aquaria/ExternalLibs/FileAPI.cpp
2012-09-23 05:30:47 +02:00

125 lines
2.2 KiB
C++

#ifdef BBGE_BUILD_VFS
#include "FileAPI.h"
#include "ttvfs_zip/VFSZipArchiveLoader.h"
#include <stdio.h>
ttvfs::VFSHelper vfs;
VFILE *vfopen(const char *fn, const char *mode)
{
if (strchr(mode, 'w'))
{
fprintf(stderr, "FileAPI.h: File writing via VFS not yet supported!");
return NULL;
}
VFILE *vf = vfs.GetFile(fn);
if (!vf || !vf->open(mode))
return NULL;
++(vf->ref); // keep the file alive until closed.
return vf;
}
size_t vfread(void *ptr, size_t size, size_t count, VFILE *vf)
{
return vf->read(ptr, size * count) / size;
}
int vfclose(VFILE *vf)
{
bool closed = vf->close();
vf->ref--;
return closed ? 0 : EOF;
}
size_t vfwrite(const void *ptr, size_t size, size_t count, VFILE *vf)
{
return vf->write(ptr, size * count) / size;
}
// return 0 on success, -1 on error
int vfseek(VFILE *vf, long int offset, int origin)
{
bool ok = false;
switch(origin)
{
case SEEK_SET: ok = vf->seek(offset); break;
case SEEK_CUR: ok = vf->seekRel(offset); break;
case SEEK_END: ok = vf->seek((long int)(vf->size() - offset)); break;
}
return ok ? 0 : -1;
}
char *vfgets(char *str, int num, VFILE *vf)
{
char *s = str;
if (vf->iseof())
return NULL;
char *ptr = (char*)vf->getBuf() + vf->getpos();
unsigned int remain = int(vf->size() - vf->getpos());
if (remain < (unsigned int)num)
num = remain;
else
--num; // be sure to keep space for the final null char
int i = 0;
char c;
for( ; i < num && *ptr; ++i)
{
c = (*s++ = *ptr++);
if(c == '\n' || c == '\r')
{
++i;
c = *ptr++; // because windows linebreaks suck.
if(c == '\n' || c == '\r')
++i;
break;
}
}
vf->seekRel(i);
*s++ = 0;
return str;
}
void vfclear(VFILE *vf)
{
vf->dropBuf(true);
}
long int vftell(VFILE *vf)
{
return (long int)vf->getpos();
}
InStream::InStream(const std::string& fn)
: std::istringstream()
{
open(fn.c_str());
}
InStream::InStream(const char *fn)
: std::istringstream()
{
open(fn);
}
bool InStream::open(const char *fn)
{
ttvfs::VFSFile *vf = vfs.GetFile(fn);
if(vf)
{
vf->open("r");
str((char*)vf->getBuf()); // stringstream will always make a copy
vf->close();
vf->dropBuf(true);
return true;
}
setstate(std::ios::failbit);
return false;
}
#endif