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Optimize StringUtil::url_encode()/url_decode().

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This commit is contained in:
Xie Han
2024-11-24 01:03:28 +08:00
parent f272c0e791
commit 38d64ca2b3
2 changed files with 39 additions and 39 deletions
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77
src/util/StringUtil.cc
View File

@@ -14,6 +14,7 @@
limitations under the License.
Authors: Wu Jiaxu (wujiaxu@sogou-inc.com)
Xie Han (xiehan@sogou-inc.com)
*/
#include <ctype.h>
@@ -22,31 +23,26 @@
#include <algorithm>
#include "StringUtil.h"
static int __htoi(unsigned char *s)
static int __hex_to_int(const char s[2])
{
int value;
int c;
int value = 16;
c = s[0];
if (isupper(c))
c = tolower(c);
if (s[0] <= '9')
value *= s[0] - '0';
else
value *= toupper(s[0]) - 'A' + 10;
value = (c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10) * 16;
if (s[1] <= '9')
value += s[1] - '0';
else
value += toupper(s[1]) - 'A' + 10;
c = s[1];
if (isupper(c))
c = tolower(c);
value += (c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10);
return value;
}
static inline char __itoh(int n)
static inline char __int_to_hex(int n)
{
if (n > 9)
return n - 10 + 'A';
return n + '0';
return n <= 9 ? n + '0' : n - 10 + 'A';
}
static size_t __url_decode(char *str)
@@ -58,7 +54,7 @@ static size_t __url_decode(char *str)
{
if (*data == '%' && isxdigit(data[1]) && isxdigit(data[2]))
{
*dest = __htoi((unsigned char *)data + 1);
*dest = __hex_to_int(data + 1);
data += 2;
}
else if (*data == '+')
@@ -76,12 +72,7 @@ static size_t __url_decode(char *str)
void StringUtil::url_decode(std::string& str)
{
if (str.empty())
return;
size_t sz = __url_decode(const_cast<char *>(str.c_str()));
str.resize(sz);
str.resize(__url_decode(const_cast<char *>(str.c_str())));
}
std::string StringUtil::url_encode(const std::string& str)
@@ -92,18 +83,22 @@ std::string StringUtil::url_encode(const std::string& str)
while (cur < end)
{
if (*cur == ' ')
res += '+';
else if (isalnum(*cur) || *cur == '-' || *cur == '_' || *cur == '.' ||
*cur == '!' || *cur == '~' || *cur == '*' || *cur == '\'' ||
*cur == '(' || *cur == ')' || *cur == ':' || *cur == '/' ||
*cur == '@' || *cur == '?' || *cur == '#' || *cur == '&')
if (isalnum(*cur) || *cur == '-' || *cur == '_' || *cur == '.' ||
*cur == '!' || *cur == '~' || *cur == '*' || *cur == '\'' ||
*cur == '(' || *cur == ')' || *cur == ':' || *cur == '/' ||
*cur == '@' || *cur == '?' || *cur == '#' || *cur == '&')
{
res += *cur;
}
else if (*cur == ' ')
{
res += '+';
}
else
{
res += '%';
res += __itoh(((const unsigned char)(*cur)) >> 4);
res += __itoh(((const unsigned char)(*cur)) % 16);
res += __int_to_hex(((const unsigned char)(*cur)) >> 4);
res += __int_to_hex(((const unsigned char)(*cur)) % 16);
}
cur++;
@@ -120,17 +115,21 @@ std::string StringUtil::url_encode_component(const std::string& str)
while (cur < end)
{
if (*cur == ' ')
res += '+';
else if (isalnum(*cur) || *cur == '-' || *cur == '_' || *cur == '.' ||
*cur == '!' || *cur == '~' || *cur == '*' || *cur == '\'' ||
*cur == '(' || *cur == ')')
if (isalnum(*cur) || *cur == '-' || *cur == '_' || *cur == '.' ||
*cur == '!' || *cur == '~' || *cur == '*' || *cur == '\'' ||
*cur == '(' || *cur == ')')
{
res += *cur;
}
else if (*cur == ' ')
{
res += '+';
}
else
{
res += '%';
res += __itoh(((const unsigned char)(*cur)) >> 4);
res += __itoh(((const unsigned char)(*cur)) % 16);
res += __int_to_hex(((const unsigned char)(*cur)) >> 4);
res += __int_to_hex(((const unsigned char)(*cur)) % 16);
}
cur++;

1
src/util/StringUtil.h
View File

@@ -18,6 +18,7 @@
#ifndef _STRINGUTIL_H_
#define _STRINGUTIL_H_
#include <string>
#include <vector>