Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/zint/backend/filemem.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 /* filemem.h - write to file/memory abstraction */
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2 /*
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3 libzint - the open source barcode library
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4 Copyright (C) 2023-2024 Robin Stuart <rstuart114@gmail.com>
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5
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6 Redistribution and use in source and binary forms, with or without
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7 modification, are permitted provided that the following conditions
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8 are met:
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9
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10 1. Redistributions of source code must retain the above copyright
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11 notice, this list of conditions and the following disclaimer.
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12 2. Redistributions in binary form must reproduce the above copyright
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13 notice, this list of conditions and the following disclaimer in the
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14 documentation and/or other materials provided with the distribution.
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15 3. Neither the name of the project nor the names of its contributors
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16 may be used to endorse or promote products derived from this software
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17 without specific prior written permission.
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19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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20 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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23 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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24 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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25 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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26 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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28 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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29 SUCH DAMAGE.
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30 */
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31 /* SPDX-License-Identifier: BSD-3-Clause */
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33 #ifndef Z_FILEMEM_H
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34 #define Z_FILEMEM_H
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36 #ifdef __cplusplus
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37 extern "C" {
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38 #endif /* __cplusplus */
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40 #include <stdio.h>
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41 #include "common.h"
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43 /* Whether `vsnprintf()` available */
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44 #if (defined(_MSC_VER) && _MSC_VER < 1900) || defined(ZINT_IS_C89) /* Pre-MSVC 2015 (C++ 14.0) or C89 */
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45 #define FM_NO_VSNPRINTF
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46 #endif
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48 struct filemem {
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49 FILE *fp;
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50 unsigned char *mem;
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51 size_t memsize; /* Size of `mem` buffer (capacity) */
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52 size_t mempos; /* Current position */
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53 size_t memend; /* For use by `fm_seek()`, points to highest `mempos` reached */
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54 int flags; /* BARCODE_MEMORY_FILE or BARCODE_STDOUT */
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55 int err; /* `errno` values, reset only on `fm_open()` */
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56 #ifdef FM_NO_VSNPRINTF
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57 FILE *fp_null; /* Only used for BARCODE_MEMORY_FILE */
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58 #endif
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59 };
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61 /* `fopen()` if file, setup memory buffer if BARCODE_MEMORY_FILE, returning 1 on success, 0 on failure */
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62 INTERNAL int fm_open(struct filemem *restrict const fmp, struct zint_symbol *symbol, const char *mode);
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64 /* `fwrite()` to file or memory, returning 1 on success, 0 on failure */
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65 INTERNAL int fm_write(const void *restrict ptr, const size_t size, const size_t nitems,
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66 struct filemem *restrict const fmp);
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68 /* `fputc()` to file or memory, returning 1 on success, 0 on failure */
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69 INTERNAL int fm_putc(const int ch, struct filemem *restrict const fmp);
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71 /* `fputs()` to file or memory, returning 1 on success, 0 on failure */
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72 INTERNAL int fm_puts(const char *str, struct filemem *restrict const fmp);
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74 /* `fprintf()` to file or memory, returning 1 on success, 0 on failure */
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75 INTERNAL int fm_printf(struct filemem *restrict const fmp, const char *format, ...) ZINT_FORMAT_PRINTF(2, 3);
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77 /* Output float without trailing zeroes to `fmp` with decimal pts `dp` (precision), returning 1 on success, 0 on
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78 failure */
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79 INTERNAL int fm_putsf(const char *prefix, const int dp, const float arg, struct filemem *restrict const fmp);
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81 /* `fclose()` if file, set `symbol->memfile` & `symbol->memfile_size` if memory, returning 1 on success, 0 on
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82 failure */
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83 INTERNAL int fm_close(struct filemem *restrict const fmp, struct zint_symbol *symbol);
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85 /* `fseek()` to file/memory offset, returning 1 on success, 0 on failure */
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86 INTERNAL int fm_seek(struct filemem *restrict const fmp, const long offset, const int whence);
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88 /* `ftell()` returns current file/memory offset if successful, -1 on failure */
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89 INTERNAL long fm_tell(struct filemem *restrict const fmp);
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91 /* Return `err`, which uses `errno` values; if file and `err` not set, test `ferror()` also */
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92 INTERNAL int fm_error(struct filemem *restrict const fmp);
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94 /* `fflush()` if file, no-op if memory, returning 1 on success, 0 on failure
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95 NOTE: don't use, included only for libpng compatibility */
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parents:
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96 INTERNAL int fm_flush(struct filemem *restrict const fmp);
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97
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98 #ifdef __cplusplus
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99 }
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parents:
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100 #endif /* __cplusplus */
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parents:
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101
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parents:
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102 /* vim: set ts=4 sw=4 et : */
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parents:
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103 #endif /* Z_FILEMEM_H */