mirror of
https://github.com/aaru-dps/aaruremote.git
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59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* This file is part of the Aaru Remote Server.
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* Copyright (c) 2019-2020 Natalia Portillo.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <malloc.h>
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#include <stddef.h>
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#include <string.h>
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int Hexchr2Bin(const char hex, char* out)
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{
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if(out == NULL) return 0;
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if(hex >= '0' && hex <= '9') *out = hex - '0';
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else if(hex >= 'A' && hex <= 'F')
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*out = hex - 'A' + 10;
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else if(hex >= 'a' && hex <= 'f')
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*out = hex - 'a' + 10;
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else
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return 0;
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return 1;
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}
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size_t Hexs2Bin(const char* hex, unsigned char** out)
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{
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size_t len;
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char b1;
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char b2;
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size_t i;
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if(hex == NULL || *hex == '\0' || out == NULL) return 0;
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len = strlen(hex);
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if(len % 2 != 0) return 0;
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len /= 2;
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*out = malloc(len);
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memset(*out, 'A', len);
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for(i = 0; i < len; i++)
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{
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if(!Hexchr2Bin(hex[i * 2], &b1) || !Hexchr2Bin(hex[i * 2 + 1], &b2)) return 0;
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(*out)[i] = (b1 << 4) | b2;
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}
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return len;
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} |