| 1 | /* |
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| 2 | * ---------------------------------------------------------------------- |
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| 3 | * INTERFACE: R Rappture Units Source |
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| 4 | * |
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| 5 | * ====================================================================== |
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| 6 | * AUTHOR: Derrick Kearney, Purdue University |
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| 7 | * Copyright (c) 2004-2012 HUBzero Foundation, LLC |
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| 8 | * |
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| 9 | * See the file "license.terms" for information on usage and |
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| 10 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 11 | * ====================================================================== |
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| 12 | */ |
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| 13 | |
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| 14 | #include "RpUnits.h" |
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| 15 | #include "RpBindingsDict.h" |
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| 16 | |
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| 17 | # include "RpUnitsRInterface.h" |
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| 18 | |
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| 19 | #ifdef __cplusplus |
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| 20 | extern "C" { |
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| 21 | #endif |
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| 22 | |
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| 23 | /**********************************************************************/ |
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| 24 | // FUNCTION: RPRUnitsConvertDouble(fromVal,toUnitsName) |
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| 25 | /// Perform units convertion on fromVal, return a double |
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| 26 | /** |
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| 27 | */ |
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| 28 | |
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| 29 | SEXP |
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| 30 | RPRUnitsConvertDouble( |
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| 31 | SEXP fromVal, |
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| 32 | SEXP toUnitsName) |
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| 33 | { |
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| 34 | SEXP ans; |
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| 35 | std::string convStr = ""; |
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| 36 | int showUnitsFlag = 0; |
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| 37 | double convResult = 0.0; |
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| 38 | int err = 0; |
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| 39 | |
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| 40 | ans = allocVector(REALSXP,1); |
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| 41 | PROTECT(ans); |
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| 42 | |
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| 43 | REAL(ans)[0] = 0.0; |
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| 44 | |
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| 45 | if (!isString(fromVal) || length(fromVal) != 1) { |
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| 46 | error("fromVal is not a string"); |
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| 47 | UNPROTECT(1); |
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| 48 | return ans; |
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| 49 | } |
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| 50 | |
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| 51 | if (!isString(toUnitsName) || length(toUnitsName) != 1) { |
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| 52 | error("toUnitsName is not a string"); |
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| 53 | UNPROTECT(1); |
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| 54 | return ans; |
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| 55 | } |
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| 56 | |
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| 57 | // the call to RpUnits::convert() populates the result flag |
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| 58 | convStr = RpUnits::convert(CHAR(STRING_ELT(fromVal,0)), |
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| 59 | CHAR(STRING_ELT(toUnitsName,0)), |
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| 60 | showUnitsFlag, |
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| 61 | &err); |
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| 62 | |
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| 63 | if (err) { |
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| 64 | error("unrecognized unit conversion"); |
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| 65 | UNPROTECT(1); |
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| 66 | return ans; |
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| 67 | } |
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| 68 | |
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| 69 | REAL(ans)[0] = atof(convStr.c_str()); |
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| 70 | |
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| 71 | UNPROTECT(1); |
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| 72 | |
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| 73 | return ans; |
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| 74 | } |
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| 75 | |
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| 76 | |
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| 77 | /**********************************************************************/ |
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| 78 | // FUNCTION: RPRUnitsConvertString(fromVal,toUnitsName,showUnits) |
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| 79 | /// Perform units convertion on fromVal, return a string |
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| 80 | /** |
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| 81 | */ |
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| 82 | |
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| 83 | SEXP |
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| 84 | RPRUnitsConvertString( |
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| 85 | SEXP fromVal, |
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| 86 | SEXP toUnitsName, |
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| 87 | SEXP showUnits) |
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| 88 | { |
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| 89 | SEXP ans; |
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| 90 | std::string convStr = ""; |
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| 91 | int showUnitsFlag = 1; |
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| 92 | double convResult = 0.0; |
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| 93 | int err = 0; |
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| 94 | |
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| 95 | ans = allocVector(STRSXP,1); |
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| 96 | PROTECT(ans); |
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| 97 | |
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| 98 | SET_STRING_ELT(ans,0,mkChar("")); |
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| 99 | |
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| 100 | if (!isString(fromVal) || length(fromVal) != 1) { |
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| 101 | error("fromVal is not a string"); |
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| 102 | UNPROTECT(1); |
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| 103 | return ans; |
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| 104 | } |
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| 105 | |
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| 106 | if (!isString(toUnitsName) || length(toUnitsName) != 1) { |
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| 107 | error("toUnitsName is not a string"); |
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| 108 | UNPROTECT(1); |
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| 109 | return ans; |
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| 110 | } |
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| 111 | |
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| 112 | if (!isLogical(showUnits) || length(showUnits) != 1) { |
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| 113 | error("showUnits is not a logical"); |
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| 114 | UNPROTECT(1); |
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| 115 | return ans; |
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| 116 | } |
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| 117 | |
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| 118 | showUnitsFlag = asLogical(showUnits); |
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| 119 | if (showUnitsFlag == 1) { |
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| 120 | showUnitsFlag = RPUNITS_UNITS_ON; |
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| 121 | } else { |
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| 122 | showUnitsFlag = RPUNITS_UNITS_OFF; |
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| 123 | } |
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| 124 | |
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| 125 | // the call to RpUnits::convert() populates the result flag |
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| 126 | convStr = RpUnits::convert(CHAR(STRING_ELT(fromVal,0)), |
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| 127 | CHAR(STRING_ELT(toUnitsName,0)), |
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| 128 | showUnitsFlag, |
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| 129 | &err); |
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| 130 | |
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| 131 | if (err) { |
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| 132 | error("unrecognized unit conversion"); |
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| 133 | UNPROTECT(1); |
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| 134 | return ans; |
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| 135 | } |
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| 136 | |
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| 137 | SET_STRING_ELT(ans,0,mkChar(convStr.c_str())); |
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| 138 | |
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| 139 | UNPROTECT(1); |
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| 140 | |
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| 141 | return ans; |
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| 142 | } |
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| 143 | |
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| 144 | #ifdef __cplusplus |
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| 145 | } |
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| 146 | #endif // ifdef __cplusplus |
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| 147 | |
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