80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/****************************************************************************
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* libs/libc/misc/lib_memoryregion.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/memoryregion.h>
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#include <stdlib.h>
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#include <errno.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: parse_memory_region
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*
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* Input Parameters:
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* format - The format string to parse. <start>,<end>,<flags>,...
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* start - The start address of the memory region
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* end - The end address of the memory region
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* flags - Readable 0x1, writable 0x2, executable 0x4
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* region - The memory region to populate
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* num - The number of memory regions to parse
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*
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* example: 0x1000,0x2000,0x1,0x2000,0x3000,0x3,0x3000,0x4000,0x7
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*
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****************************************************************************/
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ssize_t parse_memory_region(FAR const char *format,
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FAR struct memory_region_s *region,
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size_t num)
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{
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FAR char *endptr;
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size_t i = 0;
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if (format == NULL || region == NULL || num == 0)
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{
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return -EINVAL;
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}
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while (*format != '\0' && i < num * 3)
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{
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if (i % 3 == 0)
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{
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region[i / 3].start = strtoul(format, &endptr, 0);
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}
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else if (i % 3 == 1)
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{
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region[i / 3].end = strtoul(format, &endptr, 0);
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}
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else if (i % 3 == 2)
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{
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region[i / 3].flags = strtoul(format, &endptr, 0);
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}
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format = endptr + 1;
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i++;
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}
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return i / 3;
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}
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