52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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#include "xtoa.h"
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char* itoa(int value, int base) {
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char* result;
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// check that the base if valid
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if (base < 2 || base > 36) { *result = '\0'; return result; }
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char* ptr = result, *ptr1 = result, tmp_char;
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int tmp_value;
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do {
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tmp_value = value;
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value /= base;
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*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * base)];
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} while ( value );
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// Apply negative sign
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if (tmp_value < 0) *ptr++ = '-';
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*ptr-- = '\0';
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while(ptr1 < ptr) {
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tmp_char = *ptr;
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*ptr--= *ptr1;
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*ptr1++ = tmp_char;
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}
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return result;
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}
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char* ltoa(long value, int base) {
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char* result;
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// check that the base if valid
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if (base < 2 || base > 36) { *result = '\0'; return result; }
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char* ptr = result, *ptr1 = result, tmp_char;
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int tmp_value;
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do {
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tmp_value = value;
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value /= base;
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*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * base)];
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} while ( value );
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// Apply negative sign
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if (tmp_value < 0) *ptr++ = '-';
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*ptr-- = '\0';
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while(ptr1 < ptr) {
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tmp_char = *ptr;
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*ptr--= *ptr1;
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*ptr1++ = tmp_char;
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}
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return result;
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}
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