9a9fdf5991
At present, libfdt functions returning a structure offset return a zero-or-positive offset on success, and return a negative error code on failure. Functions which only return an error code return a positive version of the error code, or 0 on success. This patch improves consistency by always returning negative error codes on failure, for both types of function. With this change, we do away with the special fdt_offset_error() macro for checking whether a returned offset value is an error and extracting the encoded error value within. Instead an explicit (ret_value < 0) is now the preferred way of checking return values for both offset-returning and error-code-returning functions. The fdt_strerror() function in the test code is updated correspondingly to make more sense with the new conventions. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
#ifndef _LIBFDT_INTERNAL_H
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#define _LIBFDT_INTERNAL_H
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/*
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* libfdt - Flat Device Tree manipulation
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* Copyright (C) 2006 David Gibson, IBM Corporation.
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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 License
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* as published by the Free Software Foundation; either version 2.1 of
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* 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, but
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* 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 Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <fdt.h>
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#define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
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#define PALIGN(p, a) ((void *)ALIGN((unsigned long)(p), (a)))
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#define memeq(p, q, n) (memcmp((p), (q), (n)) == 0)
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#define streq(p, q) (strcmp((p), (q)) == 0)
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int _fdt_check_header(const void *fdt);
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uint32_t _fdt_next_tag(const void *fdt, int startoffset, int *nextoffset);
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const char *_fdt_find_string(const char *strtab, int tabsize, const char *s);
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int _fdt_node_end_offset(void *fdt, int nodeoffset);
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static inline void *_fdt_offset_ptr(const struct fdt_header *fdt, int offset)
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{
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return (void *)fdt + fdt_off_dt_struct(fdt) + offset;
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}
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#define SW_MAGIC (~FDT_MAGIC)
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#endif /* _LIBFDT_INTERNAL_H */
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