49 lines
865 B
C
49 lines
865 B
C
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#include <stdio.h>
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#include "swapper.h"
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#define ABS(val) ( (val) >= 0 ? (val) : -(val) )
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#define ALIGN8(val) ( (((val) >> 3) << 3) )
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union tmp {
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long int l;
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char c;
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};
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static int strlen_c(char *a)
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{
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int len;
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for (len = 0; len < __SWAPPER_MAX_STR_LENGTH; len++) {
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if (a[len] == '\0')
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break;
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}
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return len;
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}
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int swapper_length_difference(char *a, char *b)
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{
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int len_a = strlen_c(a);
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int len_b = strlen_c(b);
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return ABS(len_a - len_b);
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}
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void swapper_swap(char *a, char *b) {
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int len = strlen_c(a);
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union tmp t;
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for (int i = 0; i < (len >> 3); i++) {
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t.l = ((long int*) a)[i];
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((long int*) a)[i] = ((long int*) b)[i];
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((long int*) b)[i] = t.l;
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}
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for (int i = ALIGN8(len); i < len; i++) {
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t.c = a[i];
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a[i] = b[i];
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b[i] = t.c;
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}
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}
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