60 lines
886 B
C++
60 lines
886 B
C++
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#include "includes.h"
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// Convert a "hex string" to an integer by Anders Molin
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int httoi(const char* value)
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{
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struct HEXMAP
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{
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byte c;
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int value;
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};
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const int nHexMap = 16;
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HEXMAP hmLookup[nHexMap] =
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{
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{'0', 0}, {'1', 1},
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{'2', 2}, {'3', 3},
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{'4', 4}, {'5', 5},
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{'6', 6}, {'7', 7},
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{'8', 8}, {'9', 9},
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{'A', 10}, {'B', 11},
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{'C', 12}, {'D', 13},
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{'E', 14}, {'F', 15}
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};
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const char* s = value;
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int result = 0;
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if (*s == '0' && *(s + 1) == 'x')
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s += 2;
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bool firsttime = true;
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while (*s != '\0')
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{
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bool found = false;
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for (int i = 0; i < nHexMap; i++)
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{
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if (*s == hmLookup[i].c)
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{
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if (!firsttime)
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result <<= 4;
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result |= hmLookup[i].value;
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found = true;
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break;
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}
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}
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if (!found)
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break;
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s++;
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firsttime = false;
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}
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return result;
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}
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