101 lines
1.9 KiB
C
101 lines
1.9 KiB
C
/*
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* convert_ops.c
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*
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* Created on: Aug 27, 2011
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* Author: Tiberiu
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*/
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#include <stdlib.h>
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const string _Numbers = "0123456789abcdefghijklmnopqrstuvwxyz";
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int32 ConvertIntToString (string buffer, int32 number, int32 base)
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{
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if (base > 36 || base < 2) return 0;
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int32 len = numlen (number, base), beg = 0, i;
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uint32 n = (uint32) number;
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// If number is negative and in base 10, we put a '-' in front
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if (number < 0 && base == 10) buffer[beg++] = '-';
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// Put every digit in string
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for (i = len-1; i>=beg; i--)
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{
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buffer[i] = _Numbers[n % base];
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n /= base;
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}
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buffer[len] = 0;
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return number;
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}
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uint32 ConvertUIntToString (string buffer, uint32 number, int32 base)
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{
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if (base > 36 || base < 2) return 0;
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int32 len = unumlen (number, base), i;
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// Put every digit in string
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for (i = len-1; i >= 0; i--)
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{
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buffer[i] = _Numbers[number % base];
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number /= base;
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}
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buffer[len] = 0;
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return number;
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}
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int32 ConvertStringToInt (string buffer)
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{
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int8 negative = (buffer[0] == '-');
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int32 pos = (buffer[0] == '-' );
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int32 number = 0;
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while (IsDigit(buffer[pos]))
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{
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number = number*10 + (buffer[pos] - '0');
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pos++;
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}
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if (negative) return -number;
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return number;
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}
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uint32 ConvertStringToUInt (string buffer)
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{
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int32 pos = 0;
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int32 number = 0;
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while (IsDigit(buffer[pos]))
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{
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number = number*10 + (buffer[pos] - '0');
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pos++;
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}
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return number;
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}
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uint32 ConvertStringToIntHex (string buffer)
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{
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int32 pos = 0;
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uint32 number = 0;
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// Skip first 2 digits if it is in format 0xXXXX...
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if (buffer[1] == 'x' || buffer[1] == 'X') pos = 2;
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while (IsHexDigit(buffer[pos]))
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{
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number = number*0x10;
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if (IsDigit(buffer[pos])) number += buffer[pos] - '0';
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else if (buffer[pos] >= 'a' && buffer[pos] <= 'f') number += 10 + buffer[pos] - 'a';
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else if (buffer[pos] >= 'A' && buffer[pos] <= 'F') number += 10 + buffer[pos] - 'A';
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pos++;
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}
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return number;
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}
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