This is useful for determining how big of a buffer to allocate.
---
lib/util/stringutils.c | 5 ++++-
lib/util/stringutils.h | 7 ++++---
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/lib/util/stringutils.c b/lib/util/stringutils.c
index e13bbd4..89cbeda 100644
--- a/lib/util/stringutils.c
+++ b/lib/util/stringutils.c
@@ -309,7 +309,10 @@ char *scrub_for_print(
// which point it is set to 'dst_sz'
size_t used = 0;
- dst[0] = '\0';
+ if (dst_sz)
+ {
+ dst[0] = '\0';
+ }
for (i = 0; src[i]; i++)
{
diff --git a/lib/util/stringutils.h b/lib/util/stringutils.h
index 6db8663..f8831b5 100644
--- a/lib/util/stringutils.h
+++ b/lib/util/stringutils.h
@@ -145,12 +145,13 @@ int expand_by_doubling(
* @note dst will be null terminated, at or before index dst_sz-1.
*
* @param[out] dst
- * Location of the buffer to hold the output string. This must
- * not be NULL.
+ * Location of the buffer to hold the output string. This may be
+ * NULL, but only if @p dst_sz is 0.
* @param[in] src
* The input string to escape. This must not be NULL.
* @param[in] dst_sz
- * Size of the buffer at @p dst. This must not be 0.
+ * Size of the buffer at @p dst. This may be 0, in which case @p
+ * dst is ignored.
* @param[out] dst_len_out
* On successful return, the value at this location will be set to
* the length of the escaped string (excluding the nul terminator)
--
2.4.3
------------------------------------------------------------------------------
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