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[Base] Add sanity checks in StringBuffer.

This commit is contained in:
gibbed 2020-04-13 10:28:24 -05:00 committed by Rick Gibbed
parent 60681eeb23
commit 96067fb293
1 changed files with 11 additions and 3 deletions
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14
src/xenia/base/string_buffer.cc
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@ -12,13 +12,15 @@
#include <algorithm>
#include <cstdarg>
#include "xenia/base/assert.h"
#include "xenia/base/math.h"
namespace xe {
StringBuffer::StringBuffer(size_t initial_capacity) {
buffer_capacity_ = std::max(initial_capacity, static_cast<size_t>(16 * 1024));
buffer_ = reinterpret_cast<char*>(malloc(buffer_capacity_));
buffer_ = reinterpret_cast<char*>(std::malloc(buffer_capacity_));
assert_not_null(buffer_);
buffer_[0] = 0;
}
@ -40,7 +42,9 @@ void StringBuffer::Grow(size_t additional_length) {
size_t new_capacity =
std::max(xe::round_up(buffer_offset_ + additional_length, 16 * 1024),
old_capacity * 2);
buffer_ = reinterpret_cast<char*>(realloc(buffer_, new_capacity));
auto new_buffer = std::realloc(buffer_, new_capacity);
assert_not_null(new_buffer);
buffer_ = reinterpret_cast<char*>(new_buffer);
buffer_capacity_ = new_capacity;
}
@ -57,7 +61,11 @@ void StringBuffer::Append(const std::string_view value) {
}
void StringBuffer::AppendVarargs(const char* format, va_list args) {
int length = vsnprintf(nullptr, 0, format, args);
int result = vsnprintf(nullptr, 0, format, args);
if (result <= 0) {
return;
}
auto length = static_cast<size_t>(result);
Grow(length + 1);
vsnprintf(buffer_ + buffer_offset_, buffer_capacity_, format, args);
buffer_offset_ += length;