Changeset 8666 for trunk/src/kernel32/unicode/string.c

Timestamp:

Jun 15, 2002, 12:41:44 PM (23 years ago)

Author:

sandervl

Message:

added strtolW & strtoulW

File:

• trunk/src/kernel32/unicode/string.c (modified) (2 diffs)

trunk/src/kernel32/unicode/string.c

@@ -5 +5 @@
  */
 
+#include <windows.h>
+#include <limits.h>
+
 #include "wine/unicode.h"
 
@@ -37 +40 @@
     return NULL;
 }
+
+/* strtolW and strtoulW implementation based on the GNU C library code */
+/* Copyright (C) 1991,92,94,95,96,97,98,99,2000,2001 Free Software Foundation, Inc. */
+
+long int strtolW( const WCHAR *nptr, WCHAR **endptr, int base )
+{
+  int negative;
+  register unsigned long int cutoff;
+  register unsigned int cutlim;
+  register unsigned long int i;
+  register const WCHAR *s;
+  register WCHAR c;
+  const WCHAR *save, *end;
+  int overflow;
+
+  if (base < 0 || base == 1 || base > 36) return 0;
+
+  save = s = nptr;
+
+  /* Skip white space.  */
+  while (isspaceW (*s))
+    ++s;
+  if (!*s) goto noconv;
+
+  /* Check for a sign.  */
+  negative = 0;
+  if (*s == '-')
+    {
+      negative = 1;
+      ++s;
+    }
+  else if (*s == '+')
+    ++s;
+
+  /* Recognize number prefix and if BASE is zero, figure it out ourselves.  */
+  if (*s == '0')
+    {
+      if ((base == 0 || base == 16) && toupperW(s[1]) == 'X')
+        {
+          s += 2;
+          base = 16;
+        }
+      else if (base == 0)
+        base = 8;
+    }
+  else if (base == 0)
+    base = 10;
+
+  /* Save the pointer so we can check later if anything happened.  */
+  save = s;
+  end = NULL;
+
+  cutoff = ULONG_MAX / (unsigned long int) base;
+  cutlim = ULONG_MAX % (unsigned long int) base;
+
+  overflow = 0;
+  i = 0;
+  c = *s;
+  for (;c != '\0'; c = *++s)
+  {
+      if (s == end)
+          break;
+      if (c >= '0' && c <= '9')
+          c -= '0';
+      else if (isalphaW (c))
+          c = toupperW (c) - 'A' + 10;
+      else
+          break;
+      if ((int) c >= base)
+          break;
+      /* Check for overflow.  */
+      if (i > cutoff || (i == cutoff && c > cutlim))
+          overflow = 1;
+      else
+      {
+          i *= (unsigned long int) base;
+          i += c;
+      }
+  }
+
+  /* Check if anything actually happened.  */
+  if (s == save)
+    goto noconv;
+
+  /* Store in ENDPTR the address of one character
+     past the last character we converted.  */
+  if (endptr != NULL)
+    *endptr = (WCHAR *)s;
+
+  /* Check for a value that is within the range of
+     `unsigned LONG int', but outside the range of `LONG int'.  */
+  if (overflow == 0
+      && i > (negative
+              ? -((unsigned long int) (LONG_MIN + 1)) + 1
+              : (unsigned long int) LONG_MAX))
+    overflow = 1;
+
+  if (overflow)
+    {
+      return negative ? LONG_MIN : LONG_MAX;
+    }
+
+  /* Return the result of the appropriate sign.  */
+  return negative ? -i : i;
+
+noconv:
+  /* We must handle a special case here: the base is 0 or 16 and the
+     first two characters are '0' and 'x', but the rest are no
+     hexadecimal digits.  This is no error case.  We return 0 and
+     ENDPTR points to the `x`.  */
+  if (endptr != NULL)
+    {
+      if (save - nptr >= 2 && toupperW (save[-1]) == 'X'
+          && save[-2] == '0')
+        *endptr = (WCHAR *)&save[-1];
+      else
+        /*  There was no number to convert.  */
+        *endptr = (WCHAR *)nptr;
+    }
+
+  return 0L;
+}
+
+unsigned long int strtoulW( const WCHAR *nptr, WCHAR **endptr, int base )
+{
+  int negative;
+  register unsigned long int cutoff;
+  register unsigned int cutlim;
+  register unsigned long int i;
+  register const WCHAR *s;
+  register WCHAR c;
+  const WCHAR *save, *end;
+  int overflow;
+
+  if (base < 0 || base == 1 || base > 36) return 0;
+
+  save = s = nptr;
+
+  /* Skip white space.  */
+  while (isspaceW (*s))
+    ++s;
+  if (!*s) goto noconv;
+
+  /* Check for a sign.  */
+  negative = 0;
+  if (*s == '-')
+    {
+      negative = 1;
+      ++s;
+    }
+  else if (*s == '+')
+    ++s;
+
+  /* Recognize number prefix and if BASE is zero, figure it out ourselves.  */
+  if (*s == '0')
+    {
+      if ((base == 0 || base == 16) && toupperW(s[1]) == 'X')
+        {
+          s += 2;
+          base = 16;
+        }
+      else if (base == 0)
+        base = 8;
+    }
+  else if (base == 0)
+    base = 10;
+
+  /* Save the pointer so we can check later if anything happened.  */
+  save = s;
+  end = NULL;
+
+  cutoff = ULONG_MAX / (unsigned long int) base;
+  cutlim = ULONG_MAX % (unsigned long int) base;
+
+  overflow = 0;
+  i = 0;
+  c = *s;
+  for (;c != '\0'; c = *++s)
+  {
+      if (s == end)
+          break;
+      if (c >= '0' && c <= '9')
+          c -= '0';
+      else if (isalphaW (c))
+          c = toupperW (c) - 'A' + 10;
+      else
+          break;
+      if ((int) c >= base)
+          break;
+      /* Check for overflow.  */
+      if (i > cutoff || (i == cutoff && c > cutlim))
+          overflow = 1;
+      else
+      {
+          i *= (unsigned long int) base;
+          i += c;
+      }
+  }
+
+  /* Check if anything actually happened.  */
+  if (s == save)
+    goto noconv;
+
+  /* Store in ENDPTR the address of one character
+     past the last character we converted.  */
+  if (endptr != NULL)
+    *endptr = (WCHAR *)s;
+
+  if (overflow)
+    {
+      return ULONG_MAX;
+    }
+
+  /* Return the result of the appropriate sign.  */
+  return negative ? -i : i;
+
+noconv:
+  /* We must handle a special case here: the base is 0 or 16 and the
+     first two characters are '0' and 'x', but the rest are no
+     hexadecimal digits.  This is no error case.  We return 0 and
+     ENDPTR points to the `x`.  */
+  if (endptr != NULL)
+    {
+      if (save - nptr >= 2 && toupperW (save[-1]) == 'X'
+          && save[-2] == '0')
+        *endptr = (WCHAR *)&save[-1];
+      else
+        /*  There was no number to convert.  */
+        *endptr = (WCHAR *)nptr;
+    }
+
+  return 0L;
+}