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

     for (i = 0; i < n / sizeof(unsigned long); i++)
         adst[i].n = asrc[i].n;
     for (j = 0; j < n % sizeof(unsigned long); j++)
+        ((unsigned char *) (((unsigned long *) dst) + i))[j] =
-        ((unsigned char *) (((unsigned long *) dst) + i))[j] = ((unsigned char *) (((unsigned long *) src) + i))[j];
+            ((unsigned char *) (((unsigned long *) src) + i))[j];
     return (char *) src;
+}
 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++)
         ((unsigned long *) dst)[i] = ((unsigned long *) src)[i];
     for (j = 0; j < n % sizeof(unsigned long); j++)
+        ((unsigned char *) (((unsigned long *) dst) + i))[j] =
-        ((unsigned char *) (((unsigned long *) dst) + i))[j] = ((unsigned char *) (((unsigned long *) src) + i))[j];
+            ((unsigned char *) (((unsigned long *) src) + i))[j];
     return (char *) src;
+}
 void *memmove(void *dst, const void *src, size_t n)
     if (src > dst)
         return memcpy(dst, src, n);
     for (j = (n % sizeof(unsigned long)) - 1; j >= 0; j--)
+        ((unsigned char *) ((unsigned long *) dst))[j] =
-        ((unsigned char *) ((unsigned long *) dst))[j] = ((unsigned char *) ((unsigned long *) src))[j];
+            ((unsigned char *) ((unsigned long *) src))[j];
     for (i = n / sizeof(unsigned long) - 1; i >=0 ; i--)
         ((unsigned long *) dst)[i] = ((unsigned long *) src)[i];
     return (char *) src;
+}
 /** Compare two memory areas.
+ *
- * @param s1    Pointer to the first area to compare.
+ * @param s1        Pointer to the first area to compare.
- * @param s2    Pointer to the second area to compare.
+ * @param s2        Pointer to the second area to compare.
- * @param len   Size of the first area in bytes. Both areas must have the same
+ * @param len       Size of the first area in bytes. Both areas must have
- *      length.
+ *          the same length.
- * @return  If len is 0, return zero. If the areas match, return zero.
+ * @return      If len is 0, return zero. If the areas match, return
- *      Otherwise return non-zero.
+ *          zero. Otherwise return non-zero.
  */
 int bcmp(const char *s1, const char *s2, size_t len)
+{
     for (; len && *s1++ == *s2++; len--)
+        ;
     return len;
+}
 /** Count the number of characters in the string, not including terminating 0.
+ *
- * @param str string
+ * @param str       String.
- * @return number of characters in string.
+ * @return      Number of characters in string.
  */
 size_t strlen(const char *str)
+{
     size_t counter = 0;
     return ( c < n ? a[c] - b[c] : 0);
+}
-/** Return pointer to the first occurence of character c in string
+/** Return pointer to the first occurence of character c in string.
+ *
- * @param str scanned string
+ * @param str       Scanned string.
- * @param c searched character (taken as one byte)
+ * @param c     Searched character (taken as one byte).
- * @return pointer to the matched character or NULL if it is not found in given string.
+ * @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)
+    }
     return NULL;
+}
-/** Return pointer to the last occurence of character c in string
+/** Return pointer to the last occurence of character c in string.
+ *
- * @param str scanned string
+ * @param str       Scanned string.
- * @param c searched character (taken as one byte)
+ * @param c     Searched character (taken as one byte).
- * @return pointer to the matched character or NULL if it is not found in given string.
+ * @return      Pointer to the matched character or NULL if it is not
+ *          found in given string.
  */
 char *strrchr(const char *str, int c)
+{
     char *retval = NULL;
     return (char *) retval;
+}
 /** Convert string to a number.
  * Core of strtol and strtoul functions.
+ *
- * @param nptr pointer to string
+ * @param nptr      Pointer to string.
- * @param endptr if not NULL, function stores here pointer to the first invalid character
+ * @param endptr    If not NULL, function stores here pointer to the first
+ *          invalid character.
- * @param base zero or number between 2 and 36 inclusive
+ * @param base      Zero or number between 2 and 36 inclusive.
- * @param sgn its set to 1 if minus found
+ * @param sgn       It's set to 1 if minus found.
- * @return result of conversion.
+ * @return      Result of conversion.
  */
+static unsigned long
-static unsigned long _strtoul(const char *nptr, char **endptr, int base, char *sgn)
+_strtoul(const char *nptr, char **endptr, int base, char *sgn)
+{
     unsigned char c;
     unsigned long result = 0;
     unsigned long a, b;
     const char *str = nptr;
     if (base) {
         if ((base == 1) || (base > 36)) {
             /* FIXME: set errno to EINVAL */
             return 0;
+        }
-        if ((base == 16) && (*str == '0') && ((str[1] == 'x') || (str[1] == 'X'))) {
+        if ((base == 16) && (*str == '0') && ((str[1] == 'x') ||
+            (str[1] == 'X'))) {
             str += 2;
+        }
     } else {
         base = 10;
     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;
         result = (b << 8) + (a & 0xff);
         ++str;
+    }
     if (str == tmpptr) {
+        /*
-        /* no number was found => first invalid character is the first character of the string */
+         * No number was found => first invalid character is the first
+         * character of the string.
+         */
         /* FIXME: set errno to EINVAL */
         str = nptr;
         result = 0;
+    }
     return result;
+}
 /** Convert initial part of string to long int according to given base.
- * The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-').
+ * The number may begin with an arbitrary number of whitespaces followed by
+ * optional sign (`+' or `-'). If the base is 0 or 16, the prefix `0x' may be
- * If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.
+ * inserted and the number will be taken as hexadecimal one. If the base is 0
- * If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).
+ * and the number begin with a zero, number will be taken as octal one (as with
- * Otherwise the base 0 is taken as decimal.
+ * base 8). Otherwise the base 0 is taken as decimal.
+ *
- * @param nptr pointer to string
+ * @param nptr      Pointer to string.
- * @param endptr if not NULL, function stores here pointer to the first invalid character
+ * @param endptr    If not NULL, function stores here pointer to the first
+ *          invalid character.
- * @param base zero or number between 2 and 36 inclusive
+ * @param base      Zero or number between 2 and 36 inclusive.
- * @return result of conversion.
+ * @return      Result of conversion.
  */
 long int strtol(const char *nptr, char **endptr, int base)
+{
     char sgn = 0;
     unsigned long number = 0;
     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 `-').
+ * The number may begin with an arbitrary number of whitespaces followed by
+ * optional sign (`+' or `-'). If the base is 0 or 16, the prefix `0x' may be
- * If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one.
+ * inserted and the number will be taken as hexadecimal one. If the base is 0
- * If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8).
+ * and the number begin with a zero, number will be taken as octal one (as with
- * Otherwise the base 0 is taken as decimal.
+ * base 8). Otherwise the base 0 is taken as decimal.
+ *
- * @param nptr pointer to string
+ * @param nptr      Pointer to string.
- * @param endptr if not NULL, function stores here pointer to the first invalid character
+ * @param endptr    If not NULL, function stores here pointer to the first
+ *          invalid character
- * @param base zero or number between 2 and 36 inclusive
+ * @param base      Zero or number between 2 and 36 inclusive.
- * @return result of conversion.
+ * @return      Result of conversion.
  */
 unsigned long strtoul(const char *nptr, char **endptr, int base)
+{
     char sgn = 0;
     unsigned long number = 0;

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/string.c @ 4675 – Rev 3238 → 3261