strerror.c

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// Modeled after musl libc with the use of the errid[] and errmsg[] trick

#include <errno.h>
#include <string.h>

#define E(a, b) ((unsigned char)a),
static const unsigned char errid[] = {
#include "__strerror.h"
};

#undef E
#define E(a, b) b "\0"
static const char errmsg[] =
#include "__strerror.h"
    ;

char* strerror(int err_no)
{
    const char* s = NULL;
    int i;

    for(i = 0; errid[i] && errid[i] != err_no; i++)
    {
    }

    for(s = errmsg; i; s++, i--)
    {
        for(; *s; s++)
        {
        }
    }
    return (char*)(uintptr_t)s;
}