Author: Maciej Fijalkowski <[email protected]>
Branch: extradoc
Changeset: r3856:892da22e569b
Date: 2011-07-31 00:47 +0200
http://bitbucket.org/pypy/extradoc/changeset/892da22e569b/
Log: actually, 42
diff --git a/blog/draft/string-formatting.rst b/blog/draft/string-formatting.rst
--- a/blog/draft/string-formatting.rst
+++ b/blog/draft/string-formatting.rst
@@ -7,16 +7,17 @@
has an appropriae NULL byte at the end, or any other details. A C
equivilant might be::
- char x[41];
+ char x[42];
sprintf(x, "%d %d", i, i);
Note that we had to stop for a second and consider how big numbers might get
-and overestimate the size (41 = length of the biggest number on 64bit + 1 for
-the sign).
+and overestimate the size (42 surprisingly enough is also the (length of the
+biggest number on 64bit + 1 for
+the sign) * 2 + 1 for space + 1 for the NULL byte).
This is fine, except you can't even return ``x`` from this function, a more
fair comparison might be::
- char *x = malloc(41 * sizeof(char));
+ char *x = malloc(42 * sizeof(char));
sprintf(x, "%d %d", i, i);
``x`` is slightly overallocated in some situations, but that's fine.
@@ -39,7 +40,7 @@
int main() {
int i = 0;
- char x[41];
+ char x[42];
for (i = 0; i < 10000000; i++) {
sprintf(x, "%d %d", i, i);
}
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