48 lines
800 B
C
48 lines
800 B
C
#include "oswald.h"
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#include "oswald_strings.h"
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uint16_t oswald_strlen(char *string)
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{
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int i=0;
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if (string == NULL)
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return 0;
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while (string[i] != 0) i++;
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return i;
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}
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char *itoa(int16_t value, char* result, int base)
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{
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char *ptr = result, *ptr1 = result, tmp_char;
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int16_t tmp_value;
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if (result == NULL)
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return NULL;
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// check that the base if valid
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if (base < 2 || base > 36) {
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*result = '\0';
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return result;
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}
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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)
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*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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