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-rw-r--r--whiteboard.cpp26
1 files changed, 17 insertions, 9 deletions
diff --git a/whiteboard.cpp b/whiteboard.cpp
index 09674b5..b3367cf 100644
--- a/whiteboard.cpp
+++ b/whiteboard.cpp
@@ -36,23 +36,31 @@ namespace {
return result & 0x7FFFFFFF;
}
+ fs::path data_path;
+
std::string generate_id()
{
static std::random_device r;
static std::default_random_engine e1(r());
static std::uniform_int_distribution<int> uniform_dist(0, 15);
- std::string result;
- for (int i = 0; i < 6; i++) {
- char c{static_cast<char>('0' + uniform_dist(e1))};
- if (c > '9')
- c = c - '9' + 'a';
- result.push_back(c);
+ // limit tries
+ for (int j = 0; j < 100000; j++) {
+ std::string result;
+ for (int i = 0; i < 6; i++) {
+ char c{static_cast<char>('0' + uniform_dist(e1))};
+ if (c > '9')
+ c = c - '9' + 'a';
+ result.push_back(c);
+ }
+ fs::path path{data_path / result};
+
+ if (!fs::exists(path))
+ return result;
}
- return result;
- }
- fs::path data_path;
+ return "endofcodes";
+ }
void setFileById(const std::string& data, const std::string& id)
{