mirror of
https://github.com/zint/zint
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7c1bdba8ae
and `out_colour_get_cmyk()`, to lessen chances of rounding errors (in particular for VC6) test_large: fix regression in change to test for formatting `uint64_t` for `printf()` win32/README: update MinGW/MSYS Qt version
96 lines
4.4 KiB
C
96 lines
4.4 KiB
C
/* filemem.h - write to file/memory abstraction */
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/*
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libzint - the open source barcode library
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Copyright (C) 2023-2024 Robin Stuart <rstuart114@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the project nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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/* SPDX-License-Identifier: BSD-3-Clause */
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#ifndef Z_FILEMEM_H
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#define Z_FILEMEM_H
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#include <stdio.h>
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#include "common.h"
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/* Whether `vsnprintf()` available */
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#if (defined(_MSC_VER) && _MSC_VER < 1900) || defined(ZINT_IS_C89) /* Pre-MSVC 2015 (C++ 14.0) or C89 */
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#define FM_NO_VSNPRINTF
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#endif
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struct filemem {
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FILE *fp;
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unsigned char *mem;
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size_t memsize; /* Size of `mem` buffer (capacity) */
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size_t mempos; /* Current position */
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size_t memend; /* For use by `fm_seek()`, points to highest `mempos` reached */
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int flags; /* BARCODE_MEMORY_FILE or BARCODE_STDOUT */
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int err; /* `errno` values, reset only on `fm_open()` */
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#ifdef FM_NO_VSNPRINTF
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FILE *fp_null; /* Only used for BARCODE_MEMORY_FILE */
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#endif
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};
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/* `fopen()` if file, setup memory buffer if BARCODE_MEMORY_FILE, returning 1 on success, 0 on failure */
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INTERNAL int fm_open(struct filemem *restrict const fmp, struct zint_symbol *symbol, const char *mode);
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/* `fwrite()` to file or memory, returning 1 on success, 0 on failure */
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INTERNAL int fm_write(const void *restrict ptr, const size_t size, const size_t nitems,
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struct filemem *restrict const fmp);
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/* `fputc()` to file or memory, returning 1 on success, 0 on failure */
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INTERNAL int fm_putc(const int ch, struct filemem *restrict const fmp);
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/* `fputs()` to file or memory, returning 1 on success, 0 on failure */
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INTERNAL int fm_puts(const char *str, struct filemem *restrict const fmp);
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/* `fprintf()` to file or memory, returning 1 on success, 0 on failure */
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INTERNAL int fm_printf(struct filemem *restrict const fmp, const char *format, ...);
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/* Output float without trailing zeroes to `fmp` with decimal pts `dp` (precision), returning 1 on success, 0 on
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failure */
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INTERNAL int fm_putsf(const char *prefix, const int dp, const float arg, struct filemem *restrict const fmp);
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/* `fclose()` if file, set `symbol->memfile` & `symbol->memfile_size` if memory, returning 1 on success, 0 on
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failure */
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INTERNAL int fm_close(struct filemem *restrict const fmp, struct zint_symbol *symbol);
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/* `fseek()` to file/memory offset, returning 1 on success, 0 on failure */
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INTERNAL int fm_seek(struct filemem *restrict const fmp, const long offset, const int whence);
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/* `ftell()` returns current file/memory offset if successful, -1 on failure */
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INTERNAL long fm_tell(struct filemem *restrict const fmp);
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/* Return `err`, which uses `errno` values; if file and `err` not set, test `ferror()` also */
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INTERNAL int fm_error(struct filemem *restrict const fmp);
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/* `fflush()` if file, no-op if memory, returning 1 on success, 0 on failure
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NOTE: don't use, included only for libpng compatibility */
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INTERNAL int fm_flush(struct filemem *restrict const fmp);
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/* vim: set ts=4 sw=4 et : */
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#endif /* Z_FILEMEM_H */
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