#include <algorithm>
#include <cstring>
+#include <msp/core/except.h>
#include "handle.h"
#include "memory.h"
namespace Msp {
namespace IO {
-Memory::Memory(char *d, unsigned s)
-{
- init(d, d+s, M_RDWR);
-}
+Memory::Memory(char *d, std::size_t s, Mode m):
+ Memory(d, d+s, m)
+{ }
-Memory::Memory(char *b, char *e)
+Memory::Memory(char *b, char *e, Mode m):
+ begin(b),
+ end(e),
+ pos(begin)
{
- init(b, e, M_RDWR);
+ mode = m;
}
-Memory::Memory(const char *cd, unsigned s)
-{
- char *d = const_cast<char *>(cd);
- init(d, d+s, M_READ);
-}
+Memory::Memory(const char *d, std::size_t s):
+ Memory(const_cast<char *>(d), const_cast<char *>(d+s), M_READ)
+{ }
+
+Memory::Memory(const char *b, const char *e):
+ Memory(const_cast<char *>(b), const_cast<char *>(e), M_READ)
+{ }
-Memory::Memory(const char *b, const char *e)
+void Memory::set_block(bool)
{
- init(const_cast<char *>(b), const_cast<char *>(e), M_READ);
+ throw unsupported("Memory::set_block");
}
-void Memory::init(char *b, char *e, Mode m)
+void Memory::set_inherit(bool)
{
- begin = b;
- end = e;
- pos = begin;
- mode = m;
+ throw unsupported("Memory::set_inherit");
}
-unsigned Memory::do_write(const char *buf, unsigned size)
+size_t Memory::do_write(const char *buf, size_t size)
{
- check_mode(M_WRITE);
+ check_access(M_WRITE);
- size = min<unsigned>(size, end-pos);
+ size = min<size_t>(size, end-pos);
memcpy(pos, buf, size);
pos += size;
return size;
}
-unsigned Memory::do_read(char *buf, unsigned size)
+size_t Memory::do_read(char *buf, size_t size)
{
+ check_access(M_READ);
+
if(pos==end)
{
- eof_flag = true;
+ set_eof();
return 0;
}
- size = min<unsigned>(size, end-pos);
+ size = min<size_t>(size, end-pos);
memcpy(buf, pos, size);
pos += size;
return size;
}
-unsigned Memory::put(char c)
+size_t Memory::put(char c)
{
- check_mode(M_WRITE);
+ check_access(M_WRITE);
+
+ if(pos==end)
+ return 0;
+
*pos++ = c;
return 1;
}
bool Memory::getline(string &line)
{
+ check_access(M_READ);
+
+ if(pos==end)
+ {
+ set_eof();
+ return false;
+ }
+
char *nl = find(pos, end, '\n');
line.assign(pos, nl);
- bool result = (nl!=pos);
- pos = nl;
- return result;
+ pos = (nl==end ? end : nl+1);
+ return true;
}
int Memory::get()
{
+ check_access(M_READ);
+
if(pos==end)
{
- eof_flag = true;
+ set_eof();
return -1;
}
return static_cast<unsigned char>(*pos++);
}
+const Handle &Memory::get_handle(Mode)
+{
+ throw unsupported("Memory::get_handle");
+}
+
SeekOffset Memory::seek(SeekOffset off, SeekType type)
{
char *new_pos;
throw invalid_argument("Memory::seek");
if(new_pos<begin || new_pos>end)
- throw out_of_range("Memory::seek");
+ throw bad_seek(off, type);
pos = new_pos;
+ eof_flag = false;
return pos-begin;
}
-void Memory::check_mode(Mode m) const
-{
- if(m==M_WRITE && !(mode&M_WRITE))
- throw invalid_access(M_WRITE);
-}
-
} // namespace IO
} // namespace Msp