libmisc/bspcmdline/bspcmdline_getparam.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup BSPCommandLine BSP Command Line Helpers
0007  *
0008  * @brief Obtain COPY of the Entire Matching Argument
0009  */
0010
0011 /*
0012  *  COPYRIGHT (c) 1989-2009.
0013  *  On-Line Applications Research Corporation (OAR).
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <rtems/bspcmdline.h>
0042
0043 static void copy_string(
0044   const char *start,
0045   char       *value,
0046   size_t      length
0047 )
0048 {
0049   int         i;
0050   int         quotes;
0051   const char *p = start;
0052
0053   quotes=0;
0054   for (i=0 ; *p && i<length-1; ) {
0055     if ( *p == '\"' ) {
0056       quotes++;
0057     } else if ( ((quotes % 2) == 0) && *p == ' ' )
0058       break;
0059     value[i++] = *p++;
0060     value[i] = '\0';
0061   }
0062
0063 }
0064
0065 const char *rtems_bsp_cmdline_get_param(
0066   const char *name,
0067   char       *value,
0068   size_t      length
0069 )
0070 {
0071   const char *p;
0072
0073   if ( !name )
0074     return NULL;
0075
0076   if ( !value )
0077     return NULL;
0078
0079   if ( !length )
0080     return NULL;
0081
0082   value[0] = '\0';
0083
0084   p = rtems_bsp_cmdline_get_param_raw( name );
0085
0086   if ( !p )
0087     return NULL;
0088
0089   copy_string( p, value, length );
0090
0091   return value;
0092 }