/*

 * Copyright (C) Max Dymond, <cmeister2@gmail.com>, et al.

 *

 * SPDX-License-Identifier: curl

 */

#include "full_coverage/dynamic_formatting.h"

#include <cstdarg>

#include <cstring>

// Use curl's real private layout, including its debug-build fields.

extern "C" {

#include "curl_setup.h"

#include "curlx/dynbuf.h"

}

namespace full_coverage {

namespace {

/** Call the va_list formatter with an independently bounded destination. */

void ExerciseFormat(size_t limit, const char *format, ...)

{

  dynbuf buffer;

  curlx_dyn_init(&buffer, limit);

  va_list args;

  va_start(args, format);

  volatile int result = curlx_dyn_vprintf(&buffer, format, args);

  va_end(args);

  (void)result;

  curlx_dyn_free(&buffer);

}

}  // namespace

void ExerciseDynamicFormattingCoverage()

{

  // Exact fit and the first byte above the limit cover the staged formatter's

  // normal size-limit handling without relying on failed allocations.

  ExerciseFormat(8, "%s", "1234567");

  ExerciseFormat(8, "%s", "12345678");

  ExerciseFormat(8, "%08d", 1);

  ExerciseFormat(8, "%c", 'x');

  ExerciseFormat(8, "%s", "");

  char text[601];

  std::memset(text, 'x', sizeof(text) - 1);

  text[sizeof(text) - 1] = '\0';

  // Cross the staging buffer boundary both with room and at a small limit.

  ExerciseFormat(1024, "%s", text);

  ExerciseFormat(512, "%s", text);

}

}  // namespace full_coverage