char *DEH_ReadLine(deh_context_t *context)
{
int c;
int pos;
for (pos = 0;;)
{
c = DEH_GetChar(context);
if (c < 0)
{
// end of file
return NULL;
}
// cope with lines of any length: increase the buffer size
if (pos >= context->readbuffer_size)
{
IncreaseReadBuffer(context);
}
if (c == '\n')
{
// end of line: a full line has been read
context->readbuffer[pos] = '\0';
break;
}
else if (c != '\0')
{
// normal character; don't allow NUL characters to be
// added.
context->readbuffer[pos] = (char) c;
++pos;
}
}
return context->readbuffer;
}
char *DEH_ReadLine(deh_context_t *context, boolean extended)
{
int c;
int pos;
boolean escaped = false;
for (pos = 0;;)
{
c = DEH_GetChar(context);
if (c < 0 && pos == 0)
{
// end of file
return NULL;
}
// cope with lines of any length: increase the buffer size
if (pos >= context->readbuffer_size)
{
IncreaseReadBuffer(context);
}
// extended string support
if (extended && c == '\\')
{
c = DEH_GetChar(context);
// "\n" in the middle of a string indicates an internal linefeed
if (c == 'n')
{
context->readbuffer[pos] = '\n';
++pos;
continue;
}
// values to be assigned may be split onto multiple lines by ending
// each line that is to be continued with a backslash
if (c == '\n')
{
escaped = true;
continue;
}
}
// blanks before the backslash are included in the string
// but indentation after the linefeed is not
if (escaped && c >= 0 && isspace(c) && c != '\n')
{
continue;
}
else
{
escaped = false;
}
if (c == '\n' || c < 0)
{
// end of line: a full line has been read
context->readbuffer[pos] = '\0';
break;
}
else if (c != '\0')
{
// normal character; don't allow NUL characters to be
// added.
context->readbuffer[pos] = (char) c;
++pos;
}
}
return context->readbuffer;
}
