psread.c
Author: cmaier@cmassoc.net

    /*====================================================================*
     *
     *   Copyright (c) 2013 Qualcomm Atheros, Inc.
     *
     *   All rights reserved.
     *
     *   Redistribution and use in source and binary forms, with or
     *   without modification, are permitted (subject to the limitations
     *   in the disclaimer below) provided that the following conditions
     *   are met:
     *
     *   * Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     *
     *   * Redistributions in binary form must reproduce the above
     *     copyright notice, this list of conditions and the following
     *     disclaimer in the documentation and/or other materials
     *     provided with the distribution.
     *
     *   * Neither the name of Qualcomm Atheros nor the names of
     *     its contributors may be used to endorse or promote products
     *     derived from this software without specific prior written
     *     permission.
     *
     *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
     *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
     *   COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
     *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     *   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
     *   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   uint16_t psread (uint16_t values [], uint16_t limit, FILE * fp);
     *
     *   pib.h
     *
     *   read a prescaler file and populate a scaler array;
     *
     *
     *--------------------------------------------------------------------*/

    #include <stdio.h>
    #include <ctype.h>
    #include <stdint.h>

    #include "../tools/chars.h"
    #include "../tools/error.h"
    #include "../tools/number.h"
    #include "../pib/pib.h"

    uint16_t psread (uint16_t values [], uint16_t limit, FILE * fp)

    {
    	uint16_t index = 0;
    	uint16_t count = 0;
    	uint32_t value = 0;
    	signed c;
    	while ((c = getc (fp)) != EOF)
    	{
    		if (isspace (c))
    		{
    			continue;
    		}
    		if ((c == '#') || (c == ';'))
    		{
    			do
    			{
    				c = getc (fp);
    			}
    			while ((c != '\n') && (c != EOF));
    			continue;
    		}
    		index = 0;
    		while (isdigit (c))
    		{
    			index *= 10;
    			index += c - '0';
    			c = getc (fp);
    		}
    		if (index != count)
    		{
    			error (1, ECANCELED, "Carrier %d out of order", index);
    		}
    		if (index >= limit)
    		{
    			error (1, EOVERFLOW, "Too many prescalers");
    		}
    		while (isblank (c))
    		{
    			c = getc (fp);
    		}
    		value = 0;
    		while (isxdigit (c))
    		{
    			value *= 16;
    			value += todigit (c);
    			c = getc (fp);
    		}
    		values [index] = value;
    		while ((c != '\n') && (c != EOF))
    		{
    			c = getc (fp);
    		};
    		count++;
    	}
    	return (count);
    }

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