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Improve I/O performance on Windows (especially network drives).

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Reported by Marek Pavlik.
This commit is contained in:
Piotr Fusik 2014-09-26 16:42:54 +02:00
parent 8c6ff185af
commit 5680efc7f5
1 changed files with 24 additions and 22 deletions
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46
xasm.d
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@ -28,6 +28,13 @@ version (Windows) {
extern (Windows) HANDLE GetStdHandle(DWORD nStdHandle);
}
int readByte(File *file) {
char c;
if (file.readf("%c", &c) != 1)
return -1;
return c;
}
const string TITLE = "xasm 3.1.0";
string sourceFilename = null;
@ -1175,10 +1182,8 @@ void objectByte(ubyte b) {
if (!getOption('q'))
writeln("Writing object file...");
}
ubyte[1] buffer;
buffer[0] = b;
try {
objectStream.rawWrite(buffer);
objectStream.write(cast(char) b);
} catch (Exception e) {
throw new AssemblyError("Error writing object file");
}
@ -2288,17 +2293,13 @@ void assemblyIns() {
if (inOpcode)
length = 1;
while (length != 0) {
ubyte[1] buffer;
try {
if (stream.rawRead(buffer) == null) {
if (length > 0)
throw new AssemblyError("File is too short");
break;
}
} catch (Exception e) {
throw new AssemblyError("Error reading file");
int b = readByte(&stream);
if (b < 0) {
if (length > 0)
throw new AssemblyError("File is too short");
break;
}
putByte(buffer[0]);
putByte(cast(ubyte) b);
if (length > 0) length--;
}
}
@ -2793,25 +2794,26 @@ void assemblyFile(string filename) {
foundEnd = false;
line = "";
readChar: while (!foundEnd) {
ubyte[1] buffer;
if (stream.rawRead(buffer) == null)
break;
switch (buffer[0]) {
int b = readByte(&stream);
switch (b) {
case -1:
break readChar;
case '\r':
assemblyLine();
line = "";
if (stream.rawRead(buffer) == null)
b = readByte(&stream);
if (b < 0)
break readChar;
if (buffer[0] != '\n')
line ~= cast(char) buffer[0];
if (b != '\n')
line ~= cast(char) b;
break;
case '\n':
case '\x9b':
case 0x9b:
assemblyLine();
line = "";
break;
default:
line ~= cast(char) buffer[0];
line ~= cast(char) b;
break;
}
}