Author: Alex Gaynor <[email protected]>
Branch: extradoc
Changeset: r3858:9b50137bded4
Date: 2011-07-30 15:49 -0700
http://bitbucket.org/pypy/extradoc/changeset/9b50137bded4/
Log: Update text.
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 +7,15 @@
has an appropriae NULL byte at the end, or any other details. A C
equivilant might be::
- char x[41];
+ char x[44];
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).
-This is fine, except you can't even return ``x`` from this function, a more
-fair comparison might be::
+and overestimate the size (42 = length of the biggest number on 64bit (20) +
+1 for the sign * 2 + 1 (for the space) + 1 (NUL 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(44 * sizeof(char));
sprintf(x, "%d %d", i, i);
``x`` is slightly overallocated in some situations, but that's fine.
@@ -39,7 +38,7 @@
int main() {
int i = 0;
- char x[41];
+ char x[44];
for (i = 0; i < 10000000; i++) {
sprintf(x, "%d %d", i, i);
}
@@ -61,7 +60,7 @@
int main() {
int i = 0;
for (i = 0; i < 10000000; i++) {
- char *x = malloc(23 * sizeof(char));
+ char *x = malloc(44 * sizeof(char));
sprintf(x, "%d %d", i, i);
free(x);
}
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