Mercurial > hg > truffle
diff src/share/vm/runtime/os.cpp @ 2477:3449f5e02cc4
Merge
author | coleenp |
---|---|
date | Tue, 12 Apr 2011 14:18:53 -0700 |
parents | 677234770800 |
children | 0654ee04b214 bf6481e5f96d |
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--- a/src/share/vm/runtime/os.cpp Sat Apr 09 21:16:12 2011 -0700 +++ b/src/share/vm/runtime/os.cpp Tue Apr 12 14:18:53 2011 -0700 @@ -1291,3 +1291,41 @@ } return result; } + +// Read file line by line, if line is longer than bsize, +// skip rest of line. +int os::get_line_chars(int fd, char* buf, const size_t bsize){ + size_t sz, i = 0; + + // read until EOF, EOL or buf is full + while ((sz = (int) read(fd, &buf[i], 1)) == 1 && i < (bsize-1) && buf[i] != '\n') { + ++i; + } + + if (buf[i] == '\n') { + // EOL reached so ignore EOL character and return + + buf[i] = 0; + return (int) i; + } + + buf[i+1] = 0; + + if (sz != 1) { + // EOF reached. if we read chars before EOF return them and + // return EOF on next call otherwise return EOF + + return (i == 0) ? -1 : (int) i; + } + + // line is longer than size of buf, skip to EOL + int ch; + while (read(fd, &ch, 1) == 1 && ch != '\n') { + // Do nothing + } + + // return initial part of line that fits in buf. + // If we reached EOF, it will be returned on next call. + + return (int) i; +}