24 lines
499 B
C
24 lines
499 B
C
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#include <stdlib.h>
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#include <stdint.h>
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#include <unistd.h>
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void* calloc(size_t nmemb, size_t size)
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{
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size_t bytes = nmemb * size;
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void* ptr;
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/* Test for overflow.
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* See http://stackoverflow.com/questions/1815367/multiplication-of-large-numbers-how-to-catch-overflow
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*/
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if ((nmemb == 0) || (size == 0) || (nmemb > (SIZE_MAX / size)))
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return NULL;
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ptr = malloc(bytes);
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if (!ptr)
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return NULL;
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memset(ptr, 0, bytes);
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return ptr;
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}
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