84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
//_atosize.h
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//
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/*
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This is the HDiffPatch copyright.
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Copyright (c) 2012-2017 HouSisong All Rights Reserved.
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following
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conditions:
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The above copyright notice and this permission notice shall be
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included in all copies of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef HDiffPatch_atosize_h
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#define HDiffPatch_atosize_h
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#include "libHDiffPatch/HPatch/patch_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define _kSizeMax (~(size_t)0)
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hpatch_inline static
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hpatch_BOOL a_to_size(const char* pnum,size_t slen,size_t* out_size){
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const size_t _kSizeMaxDiv10=_kSizeMax/10;
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const size_t _kSizeMaxMod10=_kSizeMax-_kSizeMaxDiv10*10;
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size_t v=0;
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size_t s;
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if (slen==0) return hpatch_FALSE;
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if ((slen>=2)&(pnum[0]=='0')) return hpatch_FALSE;
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for (s=0; s<slen; ++s) {
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size_t c=pnum[s];
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if (('0'<=c)&(c<='9'))
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;//empty ok
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else
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return hpatch_FALSE;
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c-='0';
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if (v<_kSizeMaxDiv10)
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;//empty ok
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else if ((v>_kSizeMaxDiv10)|(c>_kSizeMaxMod10))
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return hpatch_FALSE;
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v=v*10+c;
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}
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*out_size=v;
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return hpatch_TRUE;
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}
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hpatch_inline static
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hpatch_BOOL kmg_to_size(const char* pkmgnum,size_t slen,size_t* out_size){
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size_t shl;
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size_t v;
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if (slen==0) return hpatch_FALSE;
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switch (pkmgnum[slen-1]) {
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case 'k': case 'K': { shl=10; --slen;} break;
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case 'm': case 'M': { shl=20; --slen;} break;
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case 'g': case 'G': { shl=30; --slen;} break;
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default: { shl= 0; } break;
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}
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if (!a_to_size(pkmgnum,slen,&v)) return hpatch_FALSE;
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if (v>(_kSizeMax>>shl)) return hpatch_FALSE;
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*out_size=v<<shl;
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return hpatch_TRUE;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif //HDiffPatch_atosize_h
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