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annotate src/libmlk-port/port/fmemopen.c @ 349:99d9b6a7e3db

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port: implement a mort temporary friendly fmemopen function
author David Demelier <markand@malikania.fr>
date Wed, 20 Oct 2021 13:55:41 +0200
parents 7d7991f97acf
children 66ad82bc592a
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1 /*
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2 * fmemopen.h -- fmemopen polyfill
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3 *
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4 * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #if defined(_WIN32)
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20
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21 #include <sys/stat.h>
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22 #include <sys/types.h>
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23 #include <fcntl.h>
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24 #include <io.h>
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25 #include <share.h>
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26 #include <stdio.h>
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27 #include <string.h>
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28 #include <windows.h>
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29
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30 FILE *
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31 port_fmemopen(void *buf, size_t size, const char *mode)
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32 {
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33 char temppath[MAX_PATH + 1], filename[MAX_PATH + 1];
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34 FILE *fp;
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35 int fd, flags;
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36
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37 flags = _O_CREAT |
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38 _O_SHORT_LIVED |
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39 _O_TEMPORARY |
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40 _O_RDWR |
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41 _O_NOINHERIT;
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42
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43 if (strchr(mode, 'b'))
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44 flags |= _O_BINARY;
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45
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46 if (!GetTempPath(sizeof (temppath), temppath))
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47 return NULL;
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48 if (!GetTempFileName(temppath, "MLK", 0, filename))
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49 return NULL;
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50 if ((fd = _sopen(temppath, flags, _SH_DENYRW, _S_IREAD | _S_IWRITE)) < 0)
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51 return NULL;
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52 if (!(fp = fdopen(fd, mode))) {
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53 _close(fd);
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54 return NULL;
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55 }
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56
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57 fwrite(buf, size, 1, fp);
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58 rewind(fp);
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59
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60 return fopen(filename, mode);
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61 }
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62
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63 #else /* !_WIN32 */
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64
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65 #include <stdio.h>
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66
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67 FILE *
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68 port_fmemopen(void *buf, size_t len, const char *type)
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69 {
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70 return fmemopen(buf, len, type);
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71 }
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72
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73 #endif