}
strrev
char* strrev(char *str)
{
assert(str != NULL);
char *s = str, *t = str, c;
while (*t != ‘\0′)
++ t;
for (– t; s < t; ++ s, — t)
{
c = *s;
*s = *t;
*t = c;
}
return str;
}
strnset
char *strnset(char *str, int c, int count)
{
assert(str != NULL);
char *s = str;
for (; *s != ‘\0′ && s – str < count; ++ s)
*s = (char) c;
return str;
}
strset
char *strset(char *str, int c)
{
assert(str != NULL);
char *s = str;
for (; *s != ‘\0′; ++ s)
*s = (char) c;
return str;
}
strtok
char *strtok(char *strToken, const char *str)
{
assert(strToken != NULL && str != NULL);
char *s = strToken;
const char *t = str;
while (*s != ‘\0′)
{
t = str;
while (*t != ‘\0′)
{
if (*s == *t)
{
*(strToken + (s – strToken)) = ‘\0′;
return strToken;
}
++ t;
}
++ s;
}
return NULL;
}
strupr
char *strupr(char *str)
{
assert(str != NULL);
char *s = str;
while (*s != ‘\0′)
{
if (*s >= ‘a’ && *s <= ‘z’)
*s -= 0×20;
s ++;
}
return str;
}
strlwr
char *strlwr(char *str)
{
assert(str != NULL);
char *s = str;
while (*s != ‘\0′)
{
if (*s >= ‘A’ && *s <= ‘Z’)
*s += 0×20;
s ++;
}
return str;
}
memcpy
void *memcpy(void *dest, const void *src, int count)
{
assert((dest != NULL) && (src != NULL));
void *address = dest;
while (count –)
{
*(char *) dest = *(char *) src;
dest = (char *) dest + 1;
src = (char *) src + 1;
}
return address;
}
memccpy
void *memccpy(void *dest, const void *src, int c, unsigned int count)
{
assert((dest != NULL) && (src != NULL));
while (count –)
{
*(char *) dest = *(char *) src;
if (* (char *) src == (char) c)
return ((char *)dest + 1);
dest = (char *) dest + 1;
src = (char *) src + 1;
}
return NULL;
}
memchr
void *memchr(const void *buf, int c, int count)
{
assert(buf != NULL);
while (count –)
{
if (*(char *) buf == c)
return (void&n