0dbeaf7cbf
C preprocessor macros beginning/ending with underscores are
reserved for system use as well as macros containing a double
underscore anywhere, so application software macros are
supposed to be named differently.
For a header file gphoto2-abilities-list.h, this
consistently uses a macro name
LIBGPHOTO2_GPHOTO2_ABILITIES_LIST_H
for the usual
#ifndef LIBGPHOTO2_GPHOTO2_ABILITIES_LIST_H
#define LIBGPHOTO2_GPHOTO2_ABILITIES_LIST_H
... content of the header file ...
#endif /* !defined(LIBGPHOTO2_GPHOTO2_ABILITIES_LIST_H) */
Found using "clang -Weverything".
This should work, unless when run with an ancient C preprocessor
which might only the first 8 or 10 characters to distinguish
macro names and ignores the remainder of the name.
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/* lowlevel.h
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*
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* Copyright 2001 Lutz Mueller <lutz@users.sourceforge.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#ifndef CAMLIBS_KONICA_LOWLEVEL_H
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#define CAMLIBS_KONICA_LOWLEVEL_H
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#include <gphoto2/gphoto2-port.h>
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#include <gphoto2/gphoto2-context.h>
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int l_ping (GPPort *, GPContext *);
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int l_init (GPPort *, GPContext *);
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/*
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* Some comments on the structure of send_buffer, image_buffer,
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* and receive_buffer:
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*
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* send_buffer: The first two bytes are low order and high
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* byte of the command, followed by at least two
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* more bytes. The number of sent bytes has to be
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* even.
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*
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* image_buffer: This buffer will contain raw data like
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* jpeg or exif data.
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*
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* receive_buffer: The first two bytes will be the same as
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* in send_buffer. This will be checked
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* here. Then will follow low and high
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* order byte of the return status. After
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* that, depending on command and return
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* status, other bytes will follow.
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*/
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int l_send_receive (GPPort *, GPContext *,
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unsigned char *send_buffer, unsigned int send_buffer_size,
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unsigned char **receive_buffer, unsigned int *receive_buffer_size,
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unsigned int timeout,
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unsigned char **image_buffer, unsigned int *image_buffer_size);
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#endif /* !defined(CAMLIBS_KONICA_LOWLEVEL_H) */
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