WillAyd commented on code in PR #587:
URL: https://github.com/apache/arrow-adbc/pull/587#discussion_r1178015472
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c/driver/common/utils.c:
##########
@@ -124,19 +124,27 @@ void StringBuilderInit(struct StringBuilder* builder,
size_t initial_size) {
builder->size = 0;
builder->capacity = initial_size;
}
-void StringBuilderAppend(struct StringBuilder* builder, const char* value) {
- size_t length = strlen(value);
- size_t new_size = builder->size + length;
- if (new_size > builder->capacity) {
- size_t new_capacity = builder->size + length - builder->capacity;
- if (builder->size == 0) new_capacity++;
-
- builder->buffer = realloc(builder->buffer, new_capacity);
- builder->capacity = new_capacity;
+void StringBuilderAppend(struct StringBuilder* builder, const char* fmt, ...) {
+ va_list argptr;
+ int bytes_available = builder->capacity - builder->size;
+
+ va_start(argptr, fmt);
+ int n = vsnprintf(builder->buffer + builder->size, bytes_available, fmt,
argptr);
+ va_end(argptr);
+
+ if (n < 0) { // TODO: handle error
Review Comment:
Yea we should. Ideally these aren't void functions but return an integer to
indicate success / failure.
Without trying to do too much at once I am thinking of that as a follow up,
but can try to tackle within this too if it doesn't make the diff too large
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