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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/390223051): Remove C-library calls to fix the errors.
#pragma allow_unsafe_libc_calls
#endif
#include "base/check_op.h"
#include <string.h>
#include <algorithm>
#include <cstdio>
#include <sstream>
#include "base/containers/span.h"
#include "base/logging.h"
#include "base/strings/cstring_view.h"
namespace logging {
char* CheckOpValueStr(int v) {
char buf[50];
snprintf(buf, sizeof(buf), "%d", v);
return strdup(buf);
}
char* CheckOpValueStr(unsigned v) {
char buf[50];
snprintf(buf, sizeof(buf), "%u", v);
return strdup(buf);
}
char* CheckOpValueStr(long v) {
char buf[50];
snprintf(buf, sizeof(buf), "%ld", v);
return strdup(buf);
}
char* CheckOpValueStr(unsigned long v) {
char buf[50];
snprintf(buf, sizeof(buf), "%lu", v);
return strdup(buf);
}
char* CheckOpValueStr(long long v) {
char buf[50];
snprintf(buf, sizeof(buf), "%lld", v);
return strdup(buf);
}
char* CheckOpValueStr(unsigned long long v) {
char buf[50];
snprintf(buf, sizeof(buf), "%llu", v);
return strdup(buf);
}
char* CheckOpValueStr(const void* v) {
char buf[50];
snprintf(buf, sizeof(buf), "%p", v);
return strdup(buf);
}
char* CheckOpValueStr(std::nullptr_t v) {
return strdup("nullptr");
}
char* CheckOpValueStr(const std::string& v) {
return strdup(v.c_str());
}
char* CheckOpValueStr(std::string_view v) {
// Ideally this would be `strndup`, but `strndup` is not portable. We have to
// use malloc() instead of HeapArray in order to match strdup() in the other
// overloads. The API contract is that the caller uses free() to release the
// pointer returned here.
char* ret = static_cast<char*>(malloc(v.size() + 1u));
auto [val, nul] =
// SAFETY: We allocated `ret` as `v.size() + 1` bytes above.
UNSAFE_BUFFERS(base::span<char>(ret, v.size() + 1u)).split_at(v.size());
val.copy_from(v);
nul.copy_from(base::span_from_ref('\0'));
return ret;
}
char* CheckOpValueStr(base::cstring_view v) {
return strdup(v.c_str());
}
char* CheckOpValueStr(double v) {
char buf[50];
snprintf(buf, sizeof(buf), "%.6lf", v);
return strdup(buf);
}
char* StreamValToStr(const void* v,
void (*stream_func)(std::ostream&, const void*)) {
std::stringstream ss;
stream_func(ss, v);
return strdup(ss.str().c_str());
}
char* CreateCheckOpLogMessageString(const char* expr_str,
char* v1_str,
char* v2_str) {
std::stringstream ss;
ss << expr_str << " (" << v1_str << " vs. " << v2_str << ")";
free(v1_str);
free(v2_str);
return strdup(ss.str().c_str());
}
} // namespace logging
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