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copied!<p>You got homework? a generic one, tested if g++, <a href="http://effocore.googlecode.com/svn/trunk/devel/effo/codebase/addons/inl/include/impl/algo_impl.h" rel="nofollow noreferrer">http://effocore.googlecode.com/svn/trunk/devel/effo/codebase/addons/inl/include/impl/algo_impl.h</a> :</p> <pre><code>#ifdef __cplusplus static inline char *int2a_put(uintptr_t i, char *s) { do { *s++ = '0' + i % 10; i /= 10; } while (i); return s; } static inline void int2a_reverse(char *head, char *tail) { for (*tail = '\0'; --tail > head; ++head) { /* exchange */ (*head) ^= (*tail); (*tail) ^= (*head); (*head) ^= (*tail); } } template<typename t> static inline const char *int2a(t i, char *s) { char *p; char *ret = s; bool f = false; p = s; if (i < 0) { *p++ = '-'; ++ s; /* * In limits.h, INT_MAX was defined as * maximum values a `signed int' can hold. * and LONG_MAX was defined as maximum values * a `signed long int' can hold. */ switch (sizeof(t)) { case 8: { /* * Inject \p a to prevent from complaint * of compiler. */ ef64_t a = (ef64_t)i; if (-LLONG_MAX > a) { i = (t)LLONG_MAX; f = true; } } break; case 4: case 2: case 1: { /* * Inject \p a to prevent from complaint * of compiler. */ int a = (int)i; if (-INT_MAX > a) { i = (t)INT_MAX; f = true; } } break; default: break; } if (!f) { i = -i; } } p = int2a_put((uintptr_t)i, p); if (f) { ++ *s; } int2a_reverse(s, p); return ret; } /* * No "static" otherwise g++ complains * "explicit template specialization cannot have a storage class" */ template<> /*static*/ inline const char *int2a<uintptr_t>(uintptr_t i, char *s) { char *p = int2a_put(i, s); int2a_reverse(s, p); return s; } #else </code></pre>

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