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R3704/2.3.0/hadoop-2.3.0-src/hadoop-tools/hadoop-pipes/src/main/native/utils/impl/StringUtils.cc
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StringUtils.cc
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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 "hadoop/StringUtils.hh"
#include "hadoop/SerialUtils.hh"
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/time.h>
using std::string;
using std::vector;
namespace HadoopUtils {
string toString(int32_t x) {
char str[100];
sprintf(str, "%d", x);
return str;
}
int toInt(const string& val) {
int result;
char trash;
int num = sscanf(val.c_str(), "%d%c", &result, &trash);
HADOOP_ASSERT(num == 1,
"Problem converting " + val + " to integer.");
return result;
}
float toFloat(const string& val) {
float result;
char trash;
int num = sscanf(val.c_str(), "%f%c", &result, &trash);
HADOOP_ASSERT(num == 1,
"Problem converting " + val + " to float.");
return result;
}
bool toBool(const string& val) {
if (val == "true") {
return true;
} else if (val == "false") {
return false;
} else {
HADOOP_ASSERT(false,
"Problem converting " + val + " to boolean.");
}
}
/**
* Get the current time in the number of milliseconds since 1970.
*/
uint64_t getCurrentMillis() {
struct timeval tv;
struct timezone tz;
int sys = gettimeofday(&tv, &tz);
HADOOP_ASSERT(sys != -1, strerror(errno));
return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
vector<string> splitString(const std::string& str,
const char* separator) {
vector<string> result;
string::size_type prev_pos=0;
string::size_type pos=0;
while ((pos = str.find_first_of(separator, prev_pos)) != string::npos) {
if (prev_pos < pos) {
result.push_back(str.substr(prev_pos, pos-prev_pos));
}
prev_pos = pos + 1;
}
if (prev_pos < str.size()) {
result.push_back(str.substr(prev_pos));
}
return result;
}
string quoteString(const string& str,
const char* deliminators) {
string result(str);
for(int i=result.length() -1; i >= 0; --i) {
char ch = result[i];
if (!isprint(ch) ||
ch == '\\' ||
strchr(deliminators, ch)) {
switch (ch) {
case '\\':
result.replace(i, 1, "\\\\");
break;
case '\t':
result.replace(i, 1, "\\t");
break;
case '\n':
result.replace(i, 1, "\\n");
break;
case ' ':
result.replace(i, 1, "\\s");
break;
default:
char buff[4];
sprintf(buff, "\\%02x", static_cast<unsigned char>(result[i]));
result.replace(i, 1, buff);
}
}
}
return result;
}
string unquoteString(const string& str) {
string result(str);
string::size_type current = result.find('\\');
while (current != string::npos) {
if (current + 1 < result.size()) {
char new_ch;
int num_chars;
if (isxdigit(result[current+1])) {
num_chars = 2;
HADOOP_ASSERT(current + num_chars < result.size(),
"escape pattern \\<hex><hex> is missing second digit in '"
+ str + "'");
char sub_str[3];
sub_str[0] = result[current+1];
sub_str[1] = result[current+2];
sub_str[2] = '\0';
char* end_ptr = NULL;
long int int_val = strtol(sub_str, &end_ptr, 16);
HADOOP_ASSERT(*end_ptr == '\0' && int_val >= 0,
"escape pattern \\<hex><hex> is broken in '" + str + "'");
new_ch = static_cast<char>(int_val);
} else {
num_chars = 1;
switch(result[current+1]) {
case '\\':
new_ch = '\\';
break;
case 't':
new_ch = '\t';
break;
case 'n':
new_ch = '\n';
break;
case 's':
new_ch = ' ';
break;
default:
string msg("unknow n escape character '");
msg += result[current+1];
HADOOP_ASSERT(false, msg + "' found in '" + str + "'");
}
}
result.replace(current, 1 + num_chars, 1, new_ch);
current = result.find('\\', current+1);
} else {
HADOOP_ASSERT(false, "trailing \\ in '" + str + "'");
}
}
return result;
}
}
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