linux-master/lib/string.c

80 char *strcpy(char *dest, const char *src)
82 	char *tmp = dest;
84 	while ((*dest++ = *src++) != '\0')
92 char *strncpy(char *dest, const char *src, size_t count)
94 	char *tmp = dest;
102 	return dest;
107 ssize_t sized_strscpy(char *dest, const char *src, size_t count)
127 	/* If src or dest is unaligned, don't do word-at-a-time. */
128 	if (((long) dest | (long) src) & (sizeof(long) - 1))
147 			*(unsigned long *)(dest+res) = c & zero_bytemask(data);
150 		*(unsigned long *)(dest+res) = c;
160 		dest[res] = c;
169 		dest[res-1] = '\0';
176  * stpcpy - copy a string from src to dest returning a pointer to the new end
177  *          of dest, including src's %NUL-terminator. May overrun dest.
178  * @dest: pointer to end of string being copied into. Must be large enough
181  *       dest.
184  * to the new %NUL-terminating character in @dest. (For strcpy, the return
185  * value is a pointer to the start of @dest). This interface is considered
190 char *stpcpy(char *__restrict__ dest, const char *__restrict__ src);
191 char *stpcpy(char *__restrict__ dest, const char *__restrict__ src)
193 	while ((*dest++ = *src++) != '\0')
195 	return --dest;
200 char *strcat(char *dest, const char *src)
202 	char *tmp = dest;
204 	while (*dest)
205 		dest++;
206 	while ((*dest++ = *src++) != '\0')
214 char *strncat(char *dest, const char *src, size_t count)
216 	char *tmp = dest;
219 		while (*dest)
220 			dest++;
221 		while ((*dest++ = *src++) != 0) {
223 				*dest = '\0';
234 size_t strlcat(char *dest, const char *src, size_t count)
236 	size_t dsize = strlen(dest);
243 	dest += dsize;
247 	__builtin_memcpy(dest, src, len);
248 	dest[len] = 0;
596  * @dest: Where to copy to
603 void *memcpy(void *dest, const void *src, size_t count)
605 	char *tmp = dest;
610 	return dest;
618  * @dest: Where to copy to
624 void *memmove(void *dest, const void *src, size_t count)
629 	if (dest <= src) {
630 		tmp = dest;
635 		tmp = dest;
642 	return dest;