Return to stream.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / lighttpd / src

Initial revision

    1: #include "stream.h"
    2: 
    3: #include <sys/types.h>
    4: #include <sys/stat.h>
    5: 
    6: #include <unistd.h>
    7: #include <fcntl.h>
    8: 
    9: #include "sys-mmap.h"
   10: 
   11: #ifndef O_BINARY
   12: # define O_BINARY 0
   13: #endif
   14: 
   15: int stream_open(stream *f, buffer *fn) {
   16: 	struct stat st;
   17: #ifdef HAVE_MMAP
   18: 	int fd;
   19: #elif defined __WIN32
   20: 	HANDLE *fh, *mh;
   21: 	void *p;
   22: #endif
   23: 
   24: 	f->start = NULL;
   25: 
   26: 	if (-1 == stat(fn->ptr, &st)) {
   27: 		return -1;
   28: 	}
   29: 
   30: 	f->size = st.st_size;
   31: 
   32: #ifdef HAVE_MMAP
   33: 	if (-1 == (fd = open(fn->ptr, O_RDONLY | O_BINARY))) {
   34: 		return -1;
   35: 	}
   36: 
   37: 	f->start = mmap(NULL, f->size, PROT_READ, MAP_SHARED, fd, 0);
   38: 
   39: 	close(fd);
   40: 
   41: 	if (MAP_FAILED == f->start) {
   42: 		return -1;
   43: 	}
   44: 
   45: #elif defined __WIN32
   46: 	fh = CreateFile(fn->ptr,
   47: 			GENERIC_READ,
   48: 			FILE_SHARE_READ,
   49: 			NULL,
   50: 			OPEN_EXISTING,
   51: 			FILE_ATTRIBUTE_READONLY,
   52: 			NULL);
   53: 
   54: 	if (!fh) return -1;
   55: 
   56: 	mh = CreateFileMapping( fh,
   57: 			NULL,
   58: 			PAGE_READONLY,
   59: 			(sizeof(off_t) > 4) ? f->size >> 32 : 0,
   60: 			f->size & 0xffffffff,
   61: 			NULL);
   62: 
   63: 	if (!mh) {
   64: /*
   65: 		LPVOID lpMsgBuf;
   66: 		FormatMessage(
   67: 		        FORMAT_MESSAGE_ALLOCATE_BUFFER |
   68: 		        FORMAT_MESSAGE_FROM_SYSTEM,
   69: 		        NULL,
   70: 		        GetLastError(),
   71: 		        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
   72: 		        (LPTSTR) &lpMsgBuf,
   73: 		        0, NULL );
   74: */
   75: 		return -1;
   76: 	}
   77: 
   78: 	p = MapViewOfFile(mh,
   79: 			FILE_MAP_READ,
   80: 			0,
   81: 			0,
   82: 			0);
   83: 	CloseHandle(mh);
   84: 	CloseHandle(fh);
   85: 
   86: 	f->start = p;
   87: #else
   88: # error no mmap found
   89: #endif
   90: 
   91: 	return 0;
   92: }
   93: 
   94: int stream_close(stream *f) {
   95: #ifdef HAVE_MMAP
   96: 	if (f->start) munmap(f->start, f->size);
   97: #elif defined(__WIN32)
   98: 	if (f->start) UnmapViewOfFile(f->start);
   99: #endif
  100: 
  101: 	f->start = NULL;
  102: 
  103: 	return 0;
  104: }