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modp_bjavascript.c
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97 lines (92 loc) · 3.21 KB
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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
/* vi: set expandtab shiftwidth=4 tabstop=4: */
/**
* \file
* <pre>
* modp_bjavascript.c High performance URL encoder/decoder
* http://code.google.com/p/stringencoders/
*
* Copyright © 2006, 2007 Nick Galbreath -- nickg [at] modp [dot] com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of the modp.com nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This is the standard "new" BSD license:
* http://www.opensource.org/licenses/bsd-license.php
* </PRE>
*/
#include "modp_bjavascript.h"
#include "modp_stdint.h"
#include "modp_bjavascript_data.h"
size_t modp_bjavascript_encode(char* dest, const char* src, size_t len)
{
const char* deststart = dest;
const uint8_t* s = (const uint8_t*) src;
const uint8_t* srcend = s + len;
uint8_t x;
uint8_t val;
/* if 0, do nothing
* if 'A', hex escape
* else, \\ + value
*/
while (s < srcend) {
x = *s++;
val = gsJavascriptEncodeMap[x];
if (val == 0) {
*dest++ = (char) x;
} else if (val == 'A') {
*dest++ = '\\';
*dest++ = 'x';
*dest++ = (char)(gsHexEncodeMap1[x]);
*dest++ = (char)(gsHexEncodeMap2[x]);
} else {
*dest++ = '\\';
*dest++ = (char)val;
}
}
*dest = '\0';
return (size_t)(dest - deststart);
}
size_t modp_bjavascript_encode_strlen(const char* src, size_t len)
{
const uint8_t* s = (const uint8_t*)src;
const uint8_t* srcend = s + len;
size_t count = 0;
uint8_t val;
while (s < srcend) {
val = gsJavascriptEncodeMap[*s++];
if (val == 0) {
count++;
} else if (val == 'A') {
count += 4;
} else {
count += 2;
}
}
return count;
}