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/*
* Copyright (C) 2003 Serge van den Boom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
* Nota bene: later versions of the GNU General Public License do not apply
* to this program.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sys/types.h>
#include <string.h>
#include "uioutils.h"
#include "mem.h"
#include "paths.h"
#include "uioport.h"
/**
* Concatenate two strings into a newly allocated buffer.
*
* @param[in] first The first (left) string, '\0' terminated.
* @param[in] second The second (right) string, '\0' terminated.
*
* @returns A newly allocated string consisting of the concatenation of
* 'first' and 'second', to be freed using uio_free().
*/
char *
strcata(const char *first, const char *second) {
char *result, *resPtr;
size_t firstLen, secondLen;
firstLen = strlen(first);
secondLen = strlen(second);
result = uio_malloc(firstLen + secondLen + 1);
resPtr = result;
memcpy(resPtr, first, firstLen);
resPtr += firstLen;
memcpy(resPtr, second, secondLen);
resPtr += secondLen;
*resPtr = '\0';
return result;
}
// returns a copy of a generic array 'array' with 'element' inserted in
// position 'insertPos'
void *
insertArray(const void *array, size_t oldNumElements, int insertPos,
const void *element, size_t elementSize) {
void *newArray, *newArrayPtr;
const void *arrayPtr;
size_t preInsertSize;
newArray = uio_malloc((oldNumElements + 1) * elementSize);
preInsertSize = insertPos * elementSize;
memcpy(newArray, array, preInsertSize);
newArrayPtr = (char *) newArray + preInsertSize;
arrayPtr = (const char *) array + preInsertSize;
memcpy(newArrayPtr, element, elementSize);
newArrayPtr = (char *) newArrayPtr + elementSize;
memcpy(newArrayPtr, arrayPtr,
(oldNumElements - insertPos) * elementSize);
return newArray;
}
// returns a copy of a pointer array 'array' with 'element' inserted in
// position 'insertPos'
void **
insertArrayPointer(const void **array, size_t oldNumElements, int insertPos,
const void *element) {
void **newArray, **newArrayPtr;
const void **arrayPtr;
size_t preInsertSize;
newArray = uio_malloc((oldNumElements + 1) * sizeof (void *));
preInsertSize = insertPos * sizeof (void *);
memcpy(newArray, array, preInsertSize);
newArrayPtr = newArray + insertPos;
arrayPtr = array + insertPos;
*newArrayPtr = unconst(element);
newArrayPtr++;
memcpy(newArrayPtr, arrayPtr,
(oldNumElements - insertPos) * sizeof (void *));
return newArray;
}
// returns a copy of a generic array 'array' with 'numExclude' elements,
// starting from startpos, removed.
void *
excludeArray(const void *array, size_t oldNumElements, int startPos,
int numExclude, size_t elementSize) {
void *newArray, *newArrayPtr;
const void *arrayPtr;
size_t preExcludeSize;
newArray = uio_malloc((oldNumElements - numExclude) * elementSize);
preExcludeSize = startPos * elementSize;
memcpy(newArray, array, preExcludeSize);
newArrayPtr = (char *) newArray + preExcludeSize;
arrayPtr = (const char *) array +
(startPos + numExclude) * sizeof (elementSize);
memcpy(newArrayPtr, arrayPtr,
(oldNumElements - startPos - numExclude) * elementSize);
return newArray;
}
// returns a copy of a pointer array 'array' with 'numExclude' elements,
// starting from startpos, removed.
void **
excludeArrayPointer(const void **array, size_t oldNumElements, int startPos,
int numExclude) {
void **newArray;
newArray = uio_malloc((oldNumElements - numExclude) * sizeof (void *));
memcpy(newArray, array, startPos * sizeof (void *));
memcpy(&newArray[startPos], &array[startPos + numExclude],
(oldNumElements - startPos - numExclude) * sizeof (void *));
return newArray;
}
// If the given DOS date/time is invalid, the result is unspecified,
// but the function won't crash.
time_t
dosToUnixTime(uio_uint16 date, uio_uint16 tm) {
// DOS date has the following format:
// bits 0-4 specify the number of the day in the month (1-31).
// bits 5-8 specify the number of the month in the year (1-12).
// bits 9-15 specify the year number since 1980 (0-127)
// DOS time has the fillowing format:
// bits 0-4 specify the number of seconds/2 in the minute (0-29)
// (only accurate on 2 seconds)
// bits 5-10 specify the number of minutes in the hour (0-59)
// bits 11-15 specify the number of hours since midnight (0-23)
int year, month, day;
int hours, minutes, seconds;
long result;
static const int daysUntilMonth[] = {
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334,
334, 334, 334, 334 };
// The last 4 entries are there so that there's no
// invalid memory access if the date is invalid.
year = date >> 9;
month = ((date >> 5) - 1) & 0x0f; // Number in [0..15]
day = (date - 1) & 0x1f; // Number in [0..31]
hours = tm >> 11;
minutes = (tm >> 5) & 0x3f;
seconds = (tm & 0x1f) * 2; // Even number in [0..62]
result = year * 365 + daysUntilMonth[month] + day;
// Count the (non-leap) days in all those years
// Add a leapday for each 4th year
if (year % 4 == 0 && month <= 2) {
// The given date is a leap-year but the leapday hasn't occured yet.
result += year / 4;
} else {
result += 1 + year / 4;
}
// result now is the number of days between 1980-01-01 and the given day.
// Add the days between 1970-01-01 and 1980-01-01
// (2 leapdays in this period)
result += 365 * 10 + 2;
result = (result * 24) + hours; // days to hours
result = (result * 60) + minutes; // hours to minutes
result = (result * 60) + seconds; // minutes to seconds
return (time_t) result;
}
char *
dosToUnixPath(const char *path) {
const char *srcPtr;
char *result, *dstPtr;
size_t skip;
result = uio_malloc(strlen(path) + 1);
srcPtr = path;
dstPtr = result;
// A UNC path will look like this: "\\server\share/..."; the first two
// characters will be backslashes, and the separator between the server
// and the share too. The rest will be slashes.
// The goal is that at every forward slash, the path should be
// stat()'able.
skip = uio_skipUNCServerShare(srcPtr);
if (skip != 0) {
char *slash;
memcpy(dstPtr, srcPtr, skip);
slash = memchr(srcPtr + 2, '/', skip - 2);
if (slash != NULL)
*slash = '\\';
srcPtr += skip;
dstPtr += skip;
}
while (*srcPtr != '\0') {
if (*srcPtr == '\\') {
*dstPtr = '/';
} else
*dstPtr = *srcPtr;
srcPtr++;
dstPtr++;
}
*dstPtr = '\0';
return result;
}
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