6 #include <msp/strings/format.h>
7 #include <msp/core/systemerror.h>
9 #include "handle_private.h"
16 File::File(const string &fn, Mode m, CreateMode cm)
19 throw invalid_argument("File::File mode");
20 if(cm&~(C_CREATE|C_TRUNCATE|C_EXCLUSIVE))
21 throw invalid_argument("File::File create");
22 if((cm&C_EXCLUSIVE) && (!(cm&C_CREATE) || (cm&C_TRUNCATE)))
23 throw invalid_argument("File::File create");
29 int create_flags = OPEN_EXISTING;
32 flags |= GENERIC_READ;
35 flags |= GENERIC_WRITE;
37 switch(static_cast<int>(cm))
39 case C_NONE: create_flags = OPEN_EXISTING; break;
40 case C_CREATE: create_flags = OPEN_ALWAYS; break;
41 case C_TRUNCATE: create_flags = TRUNCATE_EXISTING; break;
42 case C_CREATE+C_TRUNCATE: create_flags = CREATE_ALWAYS; break;
43 case C_CREATE+C_EXCLUSIVE: create_flags = CREATE_NEW; break;
47 *handle = CreateFile(fn.c_str(), flags, 0, 0, create_flags, FILE_ATTRIBUTE_NORMAL, 0);
50 int err = GetLastError();
51 if(err==ERROR_FILE_NOT_FOUND)
52 throw file_not_found(fn);
53 else if(err==ERROR_FILE_EXISTS)
54 throw file_already_exists(fn);
56 throw system_error(format("CreateFile(%s)", fn), err);
62 case M_READ: flags |= O_RDONLY; break;
63 case M_WRITE: flags |= O_WRONLY; break;
64 case M_RDWR: flags |= O_RDWR; break;
82 *handle = ::open(fn.c_str(), flags, 0666);
87 throw file_not_found(fn);
89 throw file_already_exists(fn);
91 throw system_error(format("open(%s)", fn), err);
98 signal_flush_required.emit();
102 void File::set_block(bool b)
104 mode = (mode&~M_NONBLOCK);
106 mode = (mode|M_NONBLOCK);
108 int flags = fcntl(*handle, F_GETFD);
109 fcntl(*handle, F_SETFL, (flags&O_NONBLOCK)|(b?0:O_NONBLOCK));
113 unsigned File::do_write(const char *buf, unsigned size)
115 check_access(M_WRITE);
125 return sys_write(handle, buf, size);
128 unsigned File::do_read(char *buf, unsigned size)
130 check_access(M_READ);
135 unsigned ret = sys_read(handle, buf, size);
145 signal_flush_required.emit();
151 SeekOffset File::seek(SeekOffset off, SeekType type)
153 signal_flush_required.emit();
154 off = sys_seek(handle, off, type);
160 SeekOffset File::tell() const
162 return sys_seek(const_cast<Handle &>(handle), 0, S_CUR);
165 const Handle &File::get_handle(Mode m)