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// Copyright 2011 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "util.h"
#ifdef _WIN32
#include <windows.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifndef _WIN32
#include <sys/time.h>
#endif
#include <vector>
#ifdef _WIN32
#include <direct.h> // _mkdir
#endif
#include "edit_distance.h"
void Fatal(const char* msg, ...) {
va_list ap;
fprintf(stderr, "ninja: FATAL: ");
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(1);
}
void Warning(const char* msg, ...) {
va_list ap;
fprintf(stderr, "ninja: WARNING: ");
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
fprintf(stderr, "\n");
}
void Error(const char* msg, ...) {
va_list ap;
fprintf(stderr, "ninja: error: ");
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
fprintf(stderr, "\n");
}
bool CanonicalizePath(string* path, string* err) {
// WARNING: this function is performance-critical; please benchmark
// any changes you make to it.
if (path->empty()) {
*err = "empty path";
return false;
}
const int kMaxPathComponents = 30;
char* components[kMaxPathComponents];
int component_count = 0;
char* start = &(*path)[0];
char* dst = start;
const char* src = start;
const char* end = start + path->size();
if (*src == '/') {
++src;
++dst;
}
while (src < end) {
const char* sep = (const char*)memchr(src, '/', end - src);
if (sep == NULL)
sep = end;
if (*src == '.') {
if (sep - src == 1) {
// '.' component; eliminate.
src += 2;
continue;
} else if (sep - src == 2 && src[1] == '.') {
// '..' component. Back up if possible.
if (component_count > 0) {
dst = components[component_count - 1];
src += 3;
--component_count;
} else {
while (src <= sep)
*dst++ = *src++;
}
continue;
}
}
if (sep > src) {
if (component_count == kMaxPathComponents)
Fatal("path has too many components");
components[component_count] = dst;
++component_count;
while (src <= sep) {
*dst++ = *src++;
}
}
src = sep + 1;
}
path->resize(dst - path->c_str() - 1);
return true;
}
int MakeDir(const string& path) {
#ifdef _WIN32
return _mkdir(path.c_str());
#else
return mkdir(path.c_str(), 0777);
#endif
}
int ReadFile(const string& path, string* contents, string* err) {
FILE* f = fopen(path.c_str(), "r");
if (!f) {
err->assign(strerror(errno));
return -errno;
}
char buf[64 << 10];
size_t len;
while ((len = fread(buf, 1, sizeof(buf), f)) > 0) {
contents->append(buf, len);
}
if (ferror(f)) {
err->assign(strerror(errno)); // XXX errno?
contents->clear();
fclose(f);
return -errno;
}
fclose(f);
return 0;
}
void SetCloseOnExec(int fd) {
#ifndef _WIN32
int flags = fcntl(fd, F_GETFD);
if (flags < 0) {
perror("fcntl(F_GETFD)");
} else {
if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0)
perror("fcntl(F_SETFD)");
}
#else
// On Windows, handles must be explicitly marked to be passed to a
// spawned process, so there's nothing to do here.
NINJA_UNUSED_ARG(fd);
#endif // ! _WIN32
}
int64_t GetTimeMillis() {
#ifdef _WIN32
// GetTickCount64 is only available on Vista or later.
return GetTickCount();
#else
timeval now;
gettimeofday(&now, NULL);
return ((int64_t)now.tv_sec * 1000) + (now.tv_usec / 1000);
#endif
}
const char* SpellcheckString(const string& text, ...) {
const bool kAllowReplacements = true;
const int kMaxValidEditDistance = 3;
va_list ap;
va_start(ap, text);
const char* correct_spelling;
int min_distance = kMaxValidEditDistance + 1;
const char* result = NULL;
while ((correct_spelling = va_arg(ap, const char*))) {
int distance = EditDistance(
correct_spelling, text, kAllowReplacements, kMaxValidEditDistance);
if (distance < min_distance) {
min_distance = distance;
result = correct_spelling;
}
}
va_end(ap);
return result;
}
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