diff options
Diffstat (limited to 'src/common/stringinfo.c')
| -rw-r--r-- | src/common/stringinfo.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/common/stringinfo.c b/src/common/stringinfo.c index 05b22b5c53c..dc97754a685 100644 --- a/src/common/stringinfo.c +++ b/src/common/stringinfo.c @@ -70,10 +70,16 @@ initStringInfo(StringInfo str) * * Reset the StringInfo: the data buffer remains valid, but its * previous content, if any, is cleared. + * + * Read-only StringInfos as initialized by initReadOnlyStringInfo cannot be + * reset. */ void resetStringInfo(StringInfo str) { + /* don't allow resets of read-only StringInfos */ + Assert(str->maxlen != 0); + str->data[0] = '\0'; str->len = 0; str->cursor = 0; @@ -284,6 +290,9 @@ enlargeStringInfo(StringInfo str, int needed) { int newlen; + /* validate this is not a read-only StringInfo */ + Assert(str->maxlen != 0); + /* * Guard against out-of-range "needed" values. Without this, we can get * an overflow or infinite loop in the following. |