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

 /*
  * Copyright (c) 2005 Martin Decky
+ * Copyright (c) 2008 Jiri Svoboda
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  */
 /** @file
  */
 #include <string.h>
-#include <unistd.h>
-#include <ctype.h>
+#include <stdlib.h>
 #include <limits.h>
-#include <align.h>
+#include <ctype.h>
-#include <sys/types.h>
+#include <malloc.h>
-/* Dummy implementation of mem/ functions */
-void *memset(void *s, int c, size_t n)
-{
-    char *os = s;
-    while (n--)
-        *(os++) = c;
-    return s;
-}
-struct along {
-    unsigned long n;
-} __attribute__ ((packed));
-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++)
-        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 *) 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)))
-        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 *) src) + i))[j];
-    return (char *) src;
-}
-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--)
-        ((unsigned char *) ((unsigned long *) dst))[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 s2    Pointer to the second area to compare.
- * @param len   Size of the first area in bytes. Both areas must have the same
- *      length.
- * @return  If len is 0, return zero. If the areas match, return 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;
     while (a[c] && b[c] && (!(a[c] - b[c])))
         c++;
     return (a[c] - b[c]);
+}
 int strncmp(const char *a, const char *b, size_t n)
+{
     size_t c = 0;
     return ( c < n ? a[c] - b[c] : 0);
+}
+int stricmp(const char *a, const char *b)
+{
+    int c = 0;
+    while (a[c] && b[c] && (!(tolower(a[c]) - tolower(b[c]))))
+        c++;
+    return (tolower(a[c]) - tolower(b[c]));
+}
-/** 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;
     while ((*dest++ = *src++))
+        ;
     return orig;
+}
+char * strdup(const char *s1)
+{
+    size_t len = strlen(s1) + 1;
+    void *ret = malloc(len);
+    if (ret == NULL)
+        return (char *) NULL;
+    return (char *) memcpy(ret, s1, len);
+}
+char *strtok(char *s, const char *delim)
+{
+    static char *next;
+    return strtok_r(s, delim, &next);
+}
+char *strtok_r(char *s, const char *delim, char **next)
+{
+    char *start, *end;
+    if (s == NULL)
+        s = *next;
+    /* Skip over leading delimiters. */
+    while (*s && (strchr(delim, *s) != NULL)) ++s;
+    start = s;
+    /* Skip over token characters. */
+    while (*s && (strchr(delim, *s) == NULL)) ++s;
+    end = s;
+    *next = (*s ? s + 1 : s);
+    if (start == end) {
+        return NULL;    /* No more tokens. */
+    }
+    /* Overwrite delimiter with NULL terminator. */
+    *end = '\0';
+    return start;
+}
 /** @}
  */

Subversion Repositories HelenOS

(root)//branches/dd/uspace/lib/libc/generic/string.c – Rev 3022 → 4055