| 1 | /* |
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| 2 | * ---------------------------------------------------------------------- |
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| 3 | * INTERFACE: Octave Rappture Library Source |
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| 4 | * |
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| 5 | * [retVal,err] = rpUnitsConvertDbl(fromVal, toUnitsName) |
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| 6 | * |
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| 7 | * ====================================================================== |
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| 8 | * AUTHOR: Derrick Kearney, Purdue University |
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| 9 | * Copyright (c) 2005 |
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| 10 | * Purdue Research Foundation, West Lafayette, IN |
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| 11 | * ====================================================================== |
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| 12 | */ |
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| 13 | |
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| 14 | #include "RpOctaveInterface.h" |
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| 15 | |
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| 16 | /**********************************************************************/ |
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| 17 | // METHOD: [retVal,err] = rpUnitsConvertDbl(fromVal,toUnitsName) |
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| 18 | /// Convert between RpUnits return a double value without units |
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| 19 | /** |
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| 20 | * Convert the value and units in the string @var{fromVal} to units specified |
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| 21 | * in string @var{toUnitsName}. Units will not be shown in @var{retVal}. |
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| 22 | * The second return value @var{err} specifies whether there was an error |
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| 23 | * during conversion. |
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| 24 | * Error code, err=0 on success, anything else is failure. |
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| 25 | */ |
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| 26 | |
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| 27 | DEFUN_DLD (rpUnitsConvertDbl, args, , |
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| 28 | "-*- texinfo -*-\n\ |
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| 29 | [retVal,err] = rpUnitsConvertDbl(@var{fromVal},@var{toUnitsName})\n\ |
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| 30 | \n\ |
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| 31 | Convert the value and units in the string @var{fromVal} to units specified\n\ |
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| 32 | in string @var{toUnitsName}. Units will not be shown in @var{retVal}.\n\ |
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| 33 | The second return value @var{err} specifies whether there was an error\n\ |
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| 34 | during conversion. \n\ |
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| 35 | Error code, err=0 on success, anything else is failure.") |
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| 36 | { |
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| 37 | static std::string who = "rpUnitsConvertDbl"; |
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| 38 | |
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| 39 | // The list of values to return. |
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| 40 | octave_value_list retval; |
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| 41 | int err = 1; |
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| 42 | int nargin = args.length (); |
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| 43 | std::string fromVal = ""; |
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| 44 | std::string toUnitsName = ""; |
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| 45 | int showUnits = 0; |
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| 46 | std::string retStr = ""; |
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| 47 | double retVal = 0; |
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| 48 | |
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| 49 | if (nargin == 2) { |
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| 50 | |
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| 51 | if ( args(0).is_string () && |
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| 52 | args(1).is_string () ) { |
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| 53 | |
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| 54 | fromVal = args(0).string_value (); |
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| 55 | toUnitsName = args(1).string_value (); |
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| 56 | |
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| 57 | // Call the C++ subroutine. |
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| 58 | // we allow toUnitsName to be an empty string |
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| 59 | // to let the user not change the units of fromVal |
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| 60 | // but still remove the units from being shown. |
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| 61 | if ( !fromVal.empty() ) { |
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| 62 | |
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| 63 | retStr = RpUnits::convert(fromVal,toUnitsName,showUnits,&err); |
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| 64 | if ( !err && !retStr.empty() ) { |
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| 65 | retVal = atof(retStr.c_str()); |
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| 66 | } |
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| 67 | } |
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| 68 | else { |
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| 69 | print_usage (who.c_str()); |
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| 70 | } |
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| 71 | } |
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| 72 | else { |
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| 73 | print_usage (who.c_str()); |
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| 74 | } |
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| 75 | } |
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| 76 | else { |
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| 77 | print_usage (who.c_str()); |
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| 78 | } |
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| 79 | |
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| 80 | retval(0) = retVal; |
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| 81 | retval(1) = err; |
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| 82 | return retval; |
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| 83 | } |
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