Method Logv

src/dbwrapper.cpp:21–72

This code is adapted from posix_logger.h, which is why it is using vsprintf. Please do not do this in normal code

    // This code is adapted from posix_logger.h, which is why it is using vsprintf.
    // Please do not do this in normal code
    void Logv(const char * format, va_list ap) override {
            if (!LogAcceptCategory(BCLog::LEVELDB)) {
                return;
            }
            char buffer[500];
            for (int iter = 0; iter < 2; iter++) {
                char* base;
                int bufsize;
                if (iter == 0) {
                    bufsize = sizeof(buffer);
                    base = buffer;
                }
                else {
                    bufsize = 30000;
                    base = new char[bufsize];
                }
                char* p = base;
                char* limit = base + bufsize;

                // Print the message
                if (p < limit) {
                    va_list backup_ap;
                    va_copy(backup_ap, ap);
                    // Do not use vsnprintf elsewhere in bitcoin source code, see above.
                    p += vsnprintf(p, limit - p, format, backup_ap);
                    va_end(backup_ap);
                }

                // Truncate to available space if necessary
                if (p >= limit) {
                    if (iter == 0) {
                        continue;       // Try again with larger buffer
                    }
                    else {
                        p = limit - 1;
                    }
                }

                // Add newline if necessary
                if (p == base || p[-1] != '\n') {
                    *p++ = '\n';
                }

                assert(p <= limit);
                base[std::min(bufsize - 1, (int)(p - base))] = '\0';
                LogPrintf("leveldb: %s", base);  /* Continued */
                if (base != buffer) {
                    delete[] base;
                }
                break;
            }
    }
};

static void SetMaxOpenFiles(leveldb::Options *options) {