misc.c

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/*
 * PROJECT:         ReactOS DiskPart
 * LICENSE:         GPL - See COPYING in the top level directory
 * FILE:            base/system/diskpart/misc.c
 * PURPOSE:         Manages all the partitions of the OS in an interactive way.
 * PROGRAMMERS:     Eric Kohl
 */
 
#include "diskpart.h"
 
/* FUNCTIONS ******************************************************************/
 
BOOL
IsDecString(
    _In_ PWSTR pszDecString)
{
    PWSTR ptr;
 
    if ((pszDecString == NULL) || (*pszDecString == UNICODE_NULL))
        return FALSE;
 
    ptr = pszDecString;
    while (*ptr != UNICODE_NULL)
    {
        if (!iswdigit(*ptr))
            return FALSE;
 
        ptr++;
    }
 
    return TRUE;
}
 
 
BOOL
IsHexString(
    _In_ PWSTR pszHexString)
{
    PWSTR ptr;
 
    if ((pszHexString == NULL) || (*pszHexString == UNICODE_NULL))
        return FALSE;
 
    ptr = pszHexString;
    while (*ptr != UNICODE_NULL)
    {
        if (!iswxdigit(*ptr))
            return FALSE;
 
        ptr++;
    }
 
    return TRUE;
}
 
 
BOOL
HasPrefix(
    _In_ PWSTR pszString,
    _In_ PWSTR pszPrefix,
    _Out_opt_ PWSTR *ppszSuffix)
{
    INT nPrefixLength, ret;
 
    nPrefixLength = wcslen(pszPrefix);
    ret = _wcsnicmp(pszString, pszPrefix, nPrefixLength);
    if ((ret == 0) && (ppszSuffix != NULL))
        *ppszSuffix = &pszString[nPrefixLength];
 
    return (ret == 0);
}
 
 
ULONGLONG
RoundingDivide(
    _In_ ULONGLONG Dividend,
    _In_ ULONGLONG Divisor)
{
    return (Dividend + Divisor / 2) / Divisor;
}
 
 
PWSTR
DuplicateQuotedString(
    _In_ PWSTR pszInString)
{
    PWSTR pszOutString = NULL;
    PWSTR pStart, pEnd;
    INT nLength;
 
    if ((pszInString == NULL) || (pszInString[0] == UNICODE_NULL))
        return NULL;
 
    if (pszInString[0] == L'"')
    {
        if (pszInString[1] == UNICODE_NULL)
            return NULL;
 
        pStart = &pszInString[1];
        pEnd = wcschr(pStart, '"');
        if (pEnd == NULL)
        {
            nLength = wcslen(pStart);
        }
        else
        {
            nLength = (pEnd - pStart);
        }
    }
    else
    {
        pStart = pszInString;
        nLength = wcslen(pStart);
    }
 
    pszOutString = RtlAllocateHeap(RtlGetProcessHeap(),
                                   HEAP_ZERO_MEMORY,
                                   (nLength + 1) * sizeof(WCHAR));
    if (pszOutString == NULL)
        return NULL;
 
    wcsncpy(pszOutString, pStart, nLength);
 
    return pszOutString;
}
 
 
PWSTR
DuplicateString(
    _In_ PWSTR pszInString)
{
    PWSTR pszOutString = NULL;
    INT nLength;
 
    if ((pszInString == NULL) || (pszInString[0] == UNICODE_NULL))
        return NULL;
 
    nLength = wcslen(pszInString);
    pszOutString = RtlAllocateHeap(RtlGetProcessHeap(),
                                   HEAP_ZERO_MEMORY,
                                   (nLength + 1) * sizeof(WCHAR));
    if (pszOutString == NULL)
        return NULL;
 
    wcscpy(pszOutString, pszInString);
 
    return pszOutString;
}