mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-17 04:08:28 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

O_cwrite(): rewrote for clarity, replacing all the (Oobject *)self

Browse source 
casts with a variable oself that has the proper type.  A smart
compiler may put this thing into a register.

(I'm not sure what good this does except satisfy my desire to
understand this function; I got a report about an uninitialized read
from Insure++ about this function and it hurt my eyes to even look at
it.  I gotta run away or I'll get tempted to reformat the entire
file...)
This commit is contained in:
Guido van Rossum 2001-12-07 20:20:28 +00:00
parent f70590f990
commit 2f09812efa
1 changed files with 16 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

31
Modules/cStringIO.c
View file

@ -394,31 +394,32 @@ static char O_write__doc__[] =
static int
O_cwrite(PyObject *self, char *c, int l) {
int newl;
Oobject *oself;
UNLESS (IO__opencheck(IOOOBJECT(self))) return -1;
oself = (Oobject *)self;
newl=((Oobject*)self)->pos+l;
if (newl >= ((Oobject*)self)->buf_size) {
((Oobject*)self)->buf_size*=2;
if (((Oobject*)self)->buf_size <= newl)
((Oobject*)self)->buf_size=newl+1;
UNLESS (((Oobject*)self)->buf=
(char*)realloc(
((Oobject*)self)->buf,
(((Oobject*)self)->buf_size) *sizeof(char))) {
newl = oself->pos+l;
if (newl >= oself->buf_size) {
oself->buf_size *= 2;
if (oself->buf_size <= newl)
oself->buf_size = newl+1;
UNLESS (oself->buf =
(char*)realloc(oself->buf,
(oself->buf_size) * sizeof(char))) {
PyErr_SetString(PyExc_MemoryError,"out of memory");
((Oobject*)self)->buf_size=((Oobject*)self)->pos=0;
oself->buf_size = oself->pos = 0;
return -1;
}
}
memcpy(((Oobject*)((Oobject*)self))->buf+((Oobject*)self)->pos,c,l);
memcpy(oself->buf+oself->pos,c,l);
((Oobject*)self)->pos += l;
oself->pos += l;
if (((Oobject*)self)->string_size < ((Oobject*)self)->pos) {
((Oobject*)self)->string_size = ((Oobject*)self)->pos;
}
if (oself->string_size < oself->pos) {
oself->string_size = oself->pos;
}
return l;
}