WebSVN – HelenOS-historic – Diff – /uspace/trunk/libc/generic/string.c

  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
- /** @addtogroup libc
+/** @addtogroup libc
  * @{
  */
 /** @file
  */
 #include <align.h>
 /* Dummy implementation of mem/ functions */
-void * memset(void *s, int c, size_t n)
+void *memset(void *s, int c, size_t n)
+{
     char *os = s;
     while (n--)
         *(os++) = c;
     return s;
+}
+struct along {
+    unsigned long n;
-struct along {unsigned long n; } __attribute__ ((packed));
+} __attribute__ ((packed));
-static void * unaligned_memcpy(void *dst, const void *src, size_t n)
+static void *unaligned_memcpy(void *dst, const void *src, size_t n)
+{
     int i, j;
     struct along *adst = dst;
     const struct along *asrc = src;
-    for (i = 0; i < n/sizeof(unsigned long); i++)
+    for (i = 0; i < n / sizeof(unsigned long); i++)
         adst[i].n = asrc[i].n;
-    for (j = 0; j < n%sizeof(unsigned long); j++)
+    for (j = 0; j < n % sizeof(unsigned long); j++)
-        ((unsigned char *)(((unsigned long *) dst) + i))[j] = ((unsigned char *)(((unsigned long *) src) + i))[j];
+        ((unsigned char *) (((unsigned long *) dst) + i))[j] = ((unsigned char *) (((unsigned long *) src) + i))[j];
-    return (char *)src;
+    return (char *) src;
+}
-void * memcpy(void *dst, const void *src, size_t n)
+void *memcpy(void *dst, const void *src, size_t n)
+{
     int i, j;
-    if (((long)dst & (sizeof(long)-1)) || ((long)src & (sizeof(long)-1)))
+    if (((long) dst & (sizeof(long) - 1)) || ((long) src & (sizeof(long) - 1)))
         return unaligned_memcpy(dst, src, n);
-    for (i = 0; i < n/sizeof(unsigned long); i++)
+    for (i = 0; i < n / sizeof(unsigned long); i++)
         ((unsigned long *) dst)[i] = ((unsigned long *) src)[i];
-    for (j = 0; j < n%sizeof(unsigned long); j++)
+    for (j = 0; j < n % sizeof(unsigned long); j++)
-        ((unsigned char *)(((unsigned long *) dst) + i))[j] = ((unsigned char *)(((unsigned long *) src) + i))[j];
+        ((unsigned char *) (((unsigned long *) dst) + i))[j] = ((unsigned char *) (((unsigned long *) src) + i))[j];
-    return (char *)src;
+    return (char *) src;
+}
-void * memmove(void *dst, const void *src, size_t n)
+void *memmove(void *dst, const void *src, size_t n)
+{
     int i, j;
     if (src > dst)
         return memcpy(dst, src, n);
-    for (j = (n%sizeof(unsigned long))-1; j >= 0; j--)
+    for (j = (n % sizeof(unsigned long)) - 1; j >= 0; j--)
-        ((unsigned char *)(((unsigned long *) dst) + i))[j] = ((unsigned char *)(((unsigned long *) src) + i))[j];
+        ((unsigned char *) ((unsigned long *) dst))[j] = ((unsigned char *) ((unsigned long *) src))[j];
-    for (i = n/sizeof(unsigned long)-1; i >=0 ; i--)
+    for (i = n / sizeof(unsigned long) - 1; i >=0 ; i--)
         ((unsigned long *) dst)[i] = ((unsigned long *) src)[i];
-    return (char *)src;
+    return (char *) src;
+}
 /** Count the number of characters in the string, not including terminating 0.
  * @param str string
  */
 size_t strlen(const char *str)
+{
     size_t counter = 0;
-    while (str[counter] != 0) {
+    while (str[counter] != 0)
         counter++;
-    }
     return counter;
+}
-int strcmp(const char *a,const char *b)
+int strcmp(const char *a, const char *b)
+{
-    int c=0;
+    int c = 0;
-    while(a[c]&&b[c]&&(!(a[c]-b[c]))) c++;
+    while (a[c] && b[c] && (!(a[c] - b[c])))
+        c++;
-    return a[c]-b[c];
+    return (a[c] - b[c]);
+}
 /** Return pointer to the first occurence of character c in string
  * @param str scanned string
  * @param c searched character (taken as one byte)
  * @return pointer to the matched character or NULL if it is not found in given string.
  */
 char *strchr(const char *str, int c)
+{
     while (*str != '\0') {
-        if (*str == (char)c)
+        if (*str == (char) c)
-            return (char *)str;
+            return (char *) str;
         str++;
+    }
     return NULL;
+}
 char *strrchr(const char *str, int c)
+{
     char *retval = NULL;
     while (*str != '\0') {
-        if (*str == (char)c)
+        if (*str == (char) c)
-            retval = (char *)str;
+            retval = (char *) str;
         str++;
+    }
-    return (char *)retval;
+    return (char *) retval;
+}
 /** Convert string to a number.
  * Core of strtol and strtoul functions.
  * @param nptr pointer to string
     tmpptr = str;
     while (*str) {
         c = *str;
-        c = ( c >= 'a'? c-'a'+10:(c >= 'A'?c-'A'+10:(c <= '9'?c-'0':0xff)));
+        c = (c >= 'a' ? c - 'a' + 10 : (c >= 'A' ? c - 'A' + 10 : (c <= '9' ? c - '0' : 0xff)));
         if (c > base) {
             break;
+        }
         a = (result & 0xff) * base + c;
         str = nptr;
         result = 0;
+    }
     if (endptr)
-        *endptr = (char *)str;
+        *endptr = (char *) str;
     if (nptr == str) {
         /*FIXME: errno = EINVAL*/
         return 0;
+    }
     unsigned long number = 0;
     number = _strtoul(nptr, endptr, base, &sgn);
     if (number > LONG_MAX) {
-        if ((sgn) && (number == (unsigned long)(LONG_MAX) + 1)) {
+        if ((sgn) && (number == (unsigned long) (LONG_MAX) + 1)) {
             /* FIXME: set 0 to errno */
             return number;
+        }
         /* FIXME: set ERANGE to errno */
-        return (sgn?LONG_MIN:LONG_MAX);
+        return (sgn ? LONG_MIN : LONG_MAX);
+    }
-    return (sgn?-number:number);
+    return (sgn ? -number : number);
+}
 /** Convert initial part of string to unsigned long according to given base.
  * The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').
     char sgn = 0;
     unsigned long number = 0;
     number = _strtoul(nptr, endptr, base, &sgn);
-    return (sgn?-number:number);
+    return (sgn ? -number : number);
+}
 char *strcpy(char *dest, const char *src)
+{
+    char *orig = dest;
-    while (*(dest++) = *(src++))
+    while ((*(dest++) = *(src++)));
-        ;
+    return orig;
+}
 char *strncpy(char *dest, const char *src, size_t n)
+{
+    char *orig = dest;
-    while ((*(dest++) = *(src++)) && --n)
+    while ((*(dest++) = *(src++)) && --n);
-        ;
+    return orig;
+}
- /** @}
+/** @}
  */

Subversion Repositories HelenOS-historic

(root)/uspace/trunk/libc/generic/string.c @ 1244 – Rev 1653 → 1719