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add truncate parameter to open_write

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This commit is contained in:
David Rose 2002-10-30 23:36:02 +00:00
parent 1e38e768d5
commit 35afd13237
2 changed files with 15 additions and 10 deletions
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23
dtool/src/dtoolutil/filename.cxx
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@ -1199,21 +1199,26 @@ open_read(ifstream &stream) const {
// or set_binary().
////////////////////////////////////////////////////////////////////
bool Filename::
open_write(ofstream &stream) const {
open_write(ofstream &stream, bool truncate) const {
assert(is_text() || is_binary());
int open_mode = ios::out;
if (truncate) {
open_mode |= ios::trunc;
} else {
#ifdef WIN32_VC
// Windows insists on having this set to prevent the file from being
// truncated when we open it. Makes ios::trunc kind of pointless,
// doesn't it? On the other hand, setting ios::in also seems to
// imply ios::nocreate (!), so we should only set this if the file
// already exists.
if (exists()) {
open_mode |= ios::in;
}
// Windows insists on having ios::in set to prevent the file from
// being truncated when we open it. Makes ios::trunc kind of
// pointless, doesn't it? On the other hand, setting ios::in also
// seems to imply ios::nocreate (!), so we should only set this if
// the file already exists.
if (exists()) {
open_mode |= ios::in;
}
#endif
}
#ifdef HAVE_IOS_BINARY
// For some reason, some systems (like Irix) don't define

2
dtool/src/dtoolutil/filename.h
View File

@ -150,7 +150,7 @@ PUBLISHED:
bool scan_directory(vector_string &contents) const;
bool open_read(ifstream &stream) const;
bool open_write(ofstream &stream) const;
bool open_write(ofstream &stream, bool truncate = false) const;
bool open_append(ofstream &stream) const;
bool open_read_write(fstream &stream) const;