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121 lines
2.4 KiB
C
121 lines
2.4 KiB
C
/*
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* PROJECT: ReactOS CRT library
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* LICENSE: See COPYING in the top level directory
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* FILE: lib/sdk/crt/stdlib/makepath_s.c
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* PURPOSE: Creates a path
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* PROGRAMMERS: Wine team
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* Copyright 1996,1998 Marcus Meissner
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* Copyright 1996 Jukka Iivonen
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* Copyright 1997,2000 Uwe Bonnes
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* Copyright 2000 Jon Griffiths
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*
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*/
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#include <precomp.h>
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#include <stdlib.h>
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#include <string.h>
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/*********************************************************************
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* _makepath_s (MSVCRT.@)
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*
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* Safe version of _makepath.
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*/
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int CDECL _makepath_s(char *path, size_t size, const char *drive,
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const char *directory, const char *filename,
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const char *extension)
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{
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char *p = path;
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if (!path || !size)
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{
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*_errno() = EINVAL;
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return EINVAL;
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}
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if (drive && drive[0])
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{
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if (size <= 2)
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goto range;
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*p++ = drive[0];
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*p++ = ':';
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size -= 2;
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}
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if (directory && directory[0])
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{
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size_t len = strlen(directory);
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unsigned int needs_separator = directory[len - 1] != '/' && directory[len - 1] != '\\';
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size_t copylen = min(size - 1, len);
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if (size < 2)
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goto range;
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memmove(p, directory, copylen);
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if (size <= len)
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goto range;
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p += copylen;
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size -= copylen;
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if (needs_separator)
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{
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if (size < 2)
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goto range;
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*p++ = '\\';
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size -= 1;
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}
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}
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if (filename && filename[0])
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{
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size_t len = strlen(filename);
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size_t copylen = min(size - 1, len);
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if (size < 2)
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goto range;
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memmove(p, filename, copylen);
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if (size <= len)
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goto range;
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p += len;
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size -= len;
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}
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if (extension && extension[0])
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{
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size_t len = strlen(extension);
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unsigned int needs_period = extension[0] != '.';
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size_t copylen;
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if (size < 2)
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goto range;
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if (needs_period)
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{
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*p++ = '.';
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size -= 1;
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}
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copylen = min(size - 1, len);
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memcpy(p, extension, copylen);
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if (size <= len)
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goto range;
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p += copylen;
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}
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*p = '\0';
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return 0;
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range:
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path[0] = '\0';
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*_errno() = ERANGE;
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return ERANGE;
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}
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