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compat_compiler: fix documentation for STRUCT_VAR_P

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Previously we had said that off_t was a reasonable type to hold the
result of offsetof().  That isn't so: ptrdiff_t is correct.
This commit is contained in:
Nick Mathewson
2019-09-04 10:56:57 -04:00
parent dc199f40fb
commit b39ee42904
1 changed files with 1 additions and 1 deletions
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src/lib/cc/compat_compiler.h
+1 -1
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@@ -195,7 +195,7 @@
* structure <b>st</b>. Example:
* <pre>
* struct a { int foo; int bar; } x;
* off_t bar_offset = offsetof(struct a, bar);
* ptrdiff_t bar_offset = offsetof(struct a, bar);
* int *bar_p = STRUCT_VAR_P(&x, bar_offset);
* *bar_p = 3;
* </pre>