gecko-dev/mozglue/tests/TestPrintf.cpp

/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/Printf.h"

#include <cfloat>
#include <stdarg.h>

// A simple implementation of PrintfTarget, just for testing
// PrintfTarget::print.
class TestPrintfTarget : public mozilla::PrintfTarget
{
public:

  static const char *test_string;

  TestPrintfTarget() : mOut(0) {
    memset(mBuffer, '\0', sizeof(mBuffer));
  }

  ~TestPrintfTarget() {
    MOZ_RELEASE_ASSERT(mOut == strlen(test_string));
    MOZ_RELEASE_ASSERT(strncmp(mBuffer, test_string, strlen (test_string)) == 0);
  }

  bool append(const char *sp, size_t len) override {
    if (mOut + len < sizeof(mBuffer)) {
      memcpy(&mBuffer[mOut], sp, len);
    }
    mOut += len;
    return true;
  }

private:

  char mBuffer[100];
  size_t mOut;
};

const char *TestPrintfTarget::test_string = "test string";

static void
TestPrintfTargetPrint()
{
  TestPrintfTarget checker;
  checker.print("test string");
}

static bool MOZ_FORMAT_PRINTF(2, 3)
print_one (const char *expect, const char *fmt, ...)
{
  va_list ap;

  va_start(ap, fmt);
  mozilla::SmprintfPointer output = mozilla::Vsmprintf (fmt, ap);
  va_end(ap);

  return output && !strcmp(output.get(), expect);
}

static const char *
zero()
{
  return nullptr;
}

static void
TestPrintfFormats()
{
  MOZ_RELEASE_ASSERT(print_one("0", "%d", 0));
  MOZ_RELEASE_ASSERT(print_one("23", "%d", 23));
  MOZ_RELEASE_ASSERT(print_one("+23", "%+d", 23));
  MOZ_RELEASE_ASSERT(print_one("-23", "%+d", -23));
  MOZ_RELEASE_ASSERT(print_one("0023", "%04d", 23));
  MOZ_RELEASE_ASSERT(print_one("777777", "%04d", 777777));
  MOZ_RELEASE_ASSERT(print_one("  23", "% 4d", 23));
  MOZ_RELEASE_ASSERT(print_one("23  ", "%-4d", 23));
  MOZ_RELEASE_ASSERT(print_one("  23", "%*d", 4, 23));
  MOZ_RELEASE_ASSERT(print_one("-23    ", "%*d", -7, -23));
  MOZ_RELEASE_ASSERT(print_one("  077", "%5.3d", 77));
  MOZ_RELEASE_ASSERT(print_one("  077", "%5.*d", 3, 77));
  MOZ_RELEASE_ASSERT(print_one("  077", "%*.*d", 5, 3, 77));
  MOZ_RELEASE_ASSERT(print_one("077  ", "%*.*d", -5, 3, 77));
  MOZ_RELEASE_ASSERT(print_one("77   ", "%*.*d", -5, -3, 77));
  MOZ_RELEASE_ASSERT(print_one("-1", "%d", -1));
  MOZ_RELEASE_ASSERT(print_one("23", "%u", 23u));
  MOZ_RELEASE_ASSERT(print_one("0x17", "0x%x", 23u));
  MOZ_RELEASE_ASSERT(print_one("0xFF", "0x%X", 255u));
  MOZ_RELEASE_ASSERT(print_one("027", "0%o", 23u));
  MOZ_RELEASE_ASSERT(print_one("-1", "%hd", (short) -1));
  // A funny special case.
  MOZ_RELEASE_ASSERT(print_one("", "%.*d", 0, 0));
  // This could be expanded if need be, it's just convenient to do
  // it this way.
  if (sizeof(short) == 2) {
    MOZ_RELEASE_ASSERT(print_one("8000", "%hx", (unsigned short) 0x8000));
  }
  MOZ_RELEASE_ASSERT(print_one("2305", "%ld", 2305l));
  MOZ_RELEASE_ASSERT(print_one("-2305", "%ld", -2305l));
  MOZ_RELEASE_ASSERT(print_one("0xf0f0", "0x%lx", 0xf0f0ul));
  MOZ_RELEASE_ASSERT(print_one("0", "%lld", 0ll));
  MOZ_RELEASE_ASSERT(print_one("2305", "%lld", 2305ll));
  MOZ_RELEASE_ASSERT(print_one("-2305", "%lld", -2305ll));
  // A funny special case.
  MOZ_RELEASE_ASSERT(print_one("", "%.*lld", 0, 0ll));
  MOZ_RELEASE_ASSERT(print_one("0xF0F0", "0x%llX", 0xf0f0ull));
  MOZ_RELEASE_ASSERT(print_one("27270", "%zu", (size_t) 27270));
  MOZ_RELEASE_ASSERT(print_one("27270", "%zu", (size_t) 27270));
  MOZ_RELEASE_ASSERT(print_one("hello", "he%so", "ll"));
  MOZ_RELEASE_ASSERT(print_one("(null)", "%s", zero()));
  MOZ_RELEASE_ASSERT(print_one("hello   ", "%-8s", "hello"));
  MOZ_RELEASE_ASSERT(print_one("   hello", "%8s", "hello"));
  MOZ_RELEASE_ASSERT(print_one("hello   ", "%*s", -8, "hello"));
  MOZ_RELEASE_ASSERT(print_one("hello", "%.*s", 5, "hello there"));
  MOZ_RELEASE_ASSERT(print_one("", "%.*s", 0, "hello there"));
  MOZ_RELEASE_ASSERT(print_one("%%", "%%%%"));
  MOZ_RELEASE_ASSERT(print_one("0", "%p", (char *) 0));
  MOZ_RELEASE_ASSERT(print_one("h", "%c", 'h'));
  MOZ_RELEASE_ASSERT(print_one("1.500000", "%f", 1.5f));
  MOZ_RELEASE_ASSERT(print_one("1.5", "%g", 1.5));
  MOZ_RELEASE_ASSERT(print_one("1.50000", "%.5f", 1.5));

  MOZ_RELEASE_ASSERT(print_one("z      ", "%-7s", "z"));
  MOZ_RELEASE_ASSERT(print_one("z      ", "%*s", -7, "z"));
  MOZ_RELEASE_ASSERT(print_one("hello", "%*s", -3, "hello"));

  MOZ_RELEASE_ASSERT(print_one("  q", "%3c", 'q'));
  MOZ_RELEASE_ASSERT(print_one("q  ", "%-3c", 'q'));
  MOZ_RELEASE_ASSERT(print_one("  q", "%*c", 3, 'q'));
  MOZ_RELEASE_ASSERT(print_one("q  ", "%*c", -3, 'q'));

  // Regression test for bug#1350097.  The bug was an assertion
  // failure caused by printing a very long floating point value.
  print_one("ignore", "%lf", DBL_MAX);

  MOZ_RELEASE_ASSERT(print_one("2727", "%" PRIu32, (uint32_t) 2727));
  MOZ_RELEASE_ASSERT(print_one("aa7", "%" PRIx32, (uint32_t) 2727));
  MOZ_RELEASE_ASSERT(print_one("2727", "%" PRIu64, (uint64_t) 2727));
  MOZ_RELEASE_ASSERT(print_one("aa7", "%" PRIx64, (uint64_t) 2727));

  int n1, n2;
  MOZ_RELEASE_ASSERT(print_one(" hi ", "%n hi %n", &n1, &n2));
  MOZ_RELEASE_ASSERT(n1 == 0);
  MOZ_RELEASE_ASSERT(n2 == 4);

  MOZ_RELEASE_ASSERT(print_one("23 % 24", "%2$ld %% %1$d", 24, 23l));
  MOZ_RELEASE_ASSERT(print_one("7 8 9 10", "%4$lld %3$ld %2$d %1$hd",
                               (short) 10, 9, 8l, 7ll));

  MOZ_RELEASE_ASSERT(print_one("0 ", "%2$p %1$n", &n1, zero()));
  MOZ_RELEASE_ASSERT(n1 == 2);

  MOZ_RELEASE_ASSERT(print_one("23 % 024", "%2$-3ld%%%1$4.3d", 24, 23l));
  MOZ_RELEASE_ASSERT(print_one("23 1.5", "%2$d %1$g", 1.5, 23));
  MOZ_RELEASE_ASSERT(print_one("ff number FF", "%3$llx %1$s %2$lX", "number", 255ul, 255ull));
  MOZ_RELEASE_ASSERT(print_one("7799 9977", "%2$zu %1$zu",
                               (size_t) 9977, (size_t) 7799));
}

int main()
{
  TestPrintfFormats();
  TestPrintfTargetPrint();

  return 0;
}