1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | #include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include <string.h>
char* strdup(const char* src) {
// Get the length of the src string (and the copy).
int src_length_bytes = strlen(src) + 1; // + 1 is for the '\0'
// Allocate memory for copy.
char* copy = malloc(src_length_bytes * sizeof(*copy));
// Copy each character, one by one.
for(int i = 0; i < src_length_bytes; i++) {
copy[i] = src[i];
}
return copy;
}
int main(int argc, char* argv[]) {
char* s1 = "Goldat";
char* s2 = strdup(s1);
printf("s1 == \"%s\"\n", s1);
printf("s2 == \"%s\"\n", s2);
free(s1);
free(s2);
return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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