[809] | 1 | /* |
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| 2 | * ---------------------------------------------------------------------- |
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| 3 | * rp_optimizer |
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| 4 | * |
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| 5 | * This is the C language API for the optimization package in |
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| 6 | * Rappture. It lets you set up an optimization of some fitness |
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| 7 | * function with respect to a set of inputs. |
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| 8 | * |
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| 9 | * ====================================================================== |
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| 10 | * AUTHOR: Michael McLennan, Purdue University |
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[897] | 11 | * Copyright (c) 2008 Purdue Research Foundation |
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[809] | 12 | * |
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| 13 | * See the file "license.terms" for information on usage and |
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| 14 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 15 | * ====================================================================== |
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| 16 | */ |
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| 17 | #include <math.h> |
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| 18 | #include <stdlib.h> |
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| 19 | #include <string.h> |
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| 20 | #include "rp_optimizer.h" |
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| 21 | |
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[897] | 22 | static void RpOptimCleanupParam _ANSI_ARGS_((RpOptimParam *paramPtr)); |
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| 23 | |
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[809] | 24 | /* |
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| 25 | * ---------------------------------------------------------------------- |
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| 26 | * RpOptimCreate() |
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| 27 | * |
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| 28 | * Used to create the context for an optimization. Creates an empty |
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| 29 | * context and returns a pointer to it. The context can be updated |
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| 30 | * by calling functions like RpOptimAddParamNumber to define various |
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| 31 | * input parameters. |
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| 32 | * ---------------------------------------------------------------------- |
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| 33 | */ |
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| 34 | RpOptimEnv* |
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[899] | 35 | RpOptimCreate(pluginDefn) |
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| 36 | RpOptimPlugin *pluginDefn; /* plug-in handling this optimization */ |
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[809] | 37 | { |
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| 38 | RpOptimEnv *envPtr; |
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| 39 | envPtr = (RpOptimEnv*)malloc(sizeof(RpOptimEnv)); |
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[897] | 40 | |
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[899] | 41 | envPtr->pluginDefn = pluginDefn; |
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| 42 | envPtr->pluginData = NULL; |
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| 43 | envPtr->toolData = NULL; |
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| 44 | |
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| 45 | if (pluginDefn->initProc) { |
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| 46 | envPtr->pluginData = (*pluginDefn->initProc)(); |
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| 47 | } |
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| 48 | |
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[809] | 49 | envPtr->numParams = 0; |
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[897] | 50 | envPtr->maxParams = 5; |
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[809] | 51 | envPtr->paramList = (RpOptimParam**)malloc( |
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| 52 | (size_t)(envPtr->maxParams*sizeof(RpOptimParam*)) |
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| 53 | ); |
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| 54 | |
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| 55 | return envPtr; |
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| 56 | } |
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| 57 | |
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| 58 | /* |
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| 59 | * ---------------------------------------------------------------------- |
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| 60 | * RpOptimAddParam() |
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| 61 | * |
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| 62 | * Used internally to add a new parameter into the given optimization |
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| 63 | * context. The internal list of parameters is resized, if necessary, |
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| 64 | * to accommodate the new parameter. |
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| 65 | * ---------------------------------------------------------------------- |
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| 66 | */ |
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| 67 | void |
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| 68 | RpOptimAddParam(envPtr, paramPtr) |
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| 69 | RpOptimEnv *envPtr; /* context for this optimization */ |
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| 70 | RpOptimParam *paramPtr; /* parameter being added */ |
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| 71 | { |
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| 72 | RpOptimParam **newParamList; |
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| 73 | |
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| 74 | /* |
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| 75 | * Add the new parameter at the end of the list. |
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| 76 | */ |
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| 77 | envPtr->paramList[envPtr->numParams++] = paramPtr; |
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| 78 | |
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| 79 | /* |
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| 80 | * Out of space? Then double the space available for params. |
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| 81 | */ |
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| 82 | if (envPtr->numParams >= envPtr->maxParams) { |
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| 83 | envPtr->maxParams *= 2; |
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| 84 | newParamList = (RpOptimParam**)malloc( |
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| 85 | (size_t)(envPtr->maxParams*sizeof(RpOptimParam*)) |
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| 86 | ); |
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| 87 | memcpy(newParamList, envPtr->paramList, |
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| 88 | (size_t)(envPtr->numParams*sizeof(RpOptimParam*))); |
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| 89 | free(envPtr->paramList); |
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| 90 | envPtr->paramList = newParamList; |
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| 91 | } |
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| 92 | } |
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| 93 | |
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| 94 | /* |
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| 95 | * ---------------------------------------------------------------------- |
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| 96 | * RpOptimAddParamNumber() |
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| 97 | * |
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| 98 | * Used to add a number parameter as an input to an optimization. |
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| 99 | * Each number has a name and a double precision value that can be |
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| 100 | * constrained between min/max values. Adds this number to the end |
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| 101 | * of the parameter list in the given optimization context. |
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| 102 | * ---------------------------------------------------------------------- |
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| 103 | */ |
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[897] | 104 | RpOptimParam* |
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| 105 | RpOptimAddParamNumber(envPtr, name) |
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[809] | 106 | RpOptimEnv *envPtr; /* context for this optimization */ |
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| 107 | char *name; /* name of this parameter */ |
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| 108 | { |
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| 109 | RpOptimParamNumber *numPtr; |
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| 110 | numPtr = (RpOptimParamNumber*)malloc(sizeof(RpOptimParamNumber)); |
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| 111 | numPtr->base.name = strdup(name); |
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| 112 | numPtr->base.type = RP_OPTIMPARAM_NUMBER; |
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[898] | 113 | numPtr->base.value.dval = 0.0; |
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[897] | 114 | numPtr->min = -DBL_MAX; |
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| 115 | numPtr->max = DBL_MAX; |
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[1070] | 116 | numPtr->mutnrate = PARAM_NUM_UNSPEC_MUTN_RATE; /*Unspecified by default, should result in global mutn rate being applied*/ |
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| 117 | numPtr->randdist = RAND_NUMBER_DIST_GAUSSIAN ;/*Gaussian by default*/ |
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| 118 | numPtr->stddev = 1; |
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| 119 | numPtr->mean = 0; |
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[1154] | 120 | numPtr->strictmax = 0; /*no strictmax truncation by default*/ |
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| 121 | numPtr->strictmin = 0; /*no strict minimum truncation by default*/ |
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| 122 | numPtr->units = ""; /* Blank Units by default*/ |
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[809] | 123 | RpOptimAddParam(envPtr, (RpOptimParam*)numPtr); |
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[897] | 124 | |
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| 125 | return (RpOptimParam*)numPtr; |
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[809] | 126 | } |
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| 127 | |
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| 128 | /* |
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| 129 | * ---------------------------------------------------------------------- |
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| 130 | * RpOptimAddParamString() |
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| 131 | * |
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| 132 | * Used to add a string parameter as an input to an optimization. |
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| 133 | * Each string has a name and a list of allowed values terminated |
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| 134 | * by a NULL. Adds this string to the end of the parameter list |
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| 135 | * in the given optimization context. |
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| 136 | * ---------------------------------------------------------------------- |
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| 137 | */ |
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[897] | 138 | RpOptimParam* |
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| 139 | RpOptimAddParamString(envPtr, name) |
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[809] | 140 | RpOptimEnv *envPtr; /* context for this optimization */ |
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| 141 | char *name; /* name of this parameter */ |
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| 142 | { |
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| 143 | RpOptimParamString *strPtr; |
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| 144 | strPtr = (RpOptimParamString*)malloc(sizeof(RpOptimParamString)); |
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| 145 | strPtr->base.name = strdup(name); |
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| 146 | strPtr->base.type = RP_OPTIMPARAM_STRING; |
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[898] | 147 | strPtr->base.value.sval.num = -1; |
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| 148 | strPtr->base.value.sval.str = NULL; |
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[897] | 149 | strPtr->values = NULL; |
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[898] | 150 | strPtr->numValues = 0; |
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[809] | 151 | |
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[897] | 152 | RpOptimAddParam(envPtr, (RpOptimParam*)strPtr); |
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| 153 | |
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| 154 | return (RpOptimParam*)strPtr; |
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| 155 | } |
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| 156 | |
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| 157 | /* |
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| 158 | * ---------------------------------------------------------------------- |
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| 159 | * RpOptimFindParam() |
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| 160 | * |
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| 161 | * Used to look for an existing parameter with the specified name. |
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| 162 | * Returns a pointer to the parameter, or NULL if not found. |
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| 163 | * ---------------------------------------------------------------------- |
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| 164 | */ |
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| 165 | RpOptimParam* |
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| 166 | RpOptimFindParam(envPtr, name) |
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| 167 | RpOptimEnv *envPtr; /* context for this optimization */ |
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| 168 | char *name; /* name of this parameter */ |
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| 169 | { |
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| 170 | int n; |
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| 171 | for (n=0; envPtr->numParams; n++) { |
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| 172 | if (strcmp(name, envPtr->paramList[n]->name) == 0) { |
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| 173 | return envPtr->paramList[n]; |
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| 174 | } |
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[809] | 175 | } |
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[897] | 176 | return NULL; |
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| 177 | } |
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[809] | 178 | |
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[897] | 179 | /* |
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| 180 | * ---------------------------------------------------------------------- |
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| 181 | * RpOptimDeleteParam() |
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| 182 | * |
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| 183 | * Used to delete a parameter from the environment. This is especially |
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| 184 | * useful when an error is found while configuring the parameter, just |
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| 185 | * after it was created. If the name is not recognized, this function |
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| 186 | * does nothing. |
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| 187 | * ---------------------------------------------------------------------- |
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| 188 | */ |
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| 189 | void |
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| 190 | RpOptimDeleteParam(envPtr, name) |
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| 191 | RpOptimEnv *envPtr; /* context for this optimization */ |
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| 192 | char *name; /* name of this parameter */ |
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| 193 | { |
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| 194 | int n, j; |
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| 195 | for (n=0; envPtr->numParams; n++) { |
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| 196 | if (strcmp(name, envPtr->paramList[n]->name) == 0) { |
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| 197 | RpOptimCleanupParam(envPtr->paramList[n]); |
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| 198 | for (j=n+1; j < envPtr->numParams; j++) { |
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| 199 | envPtr->paramList[j-1] = envPtr->paramList[j]; |
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| 200 | } |
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| 201 | envPtr->numParams--; |
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| 202 | break; |
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| 203 | } |
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[809] | 204 | } |
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| 205 | } |
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| 206 | |
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| 207 | /* |
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| 208 | * ---------------------------------------------------------------------- |
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| 209 | * RpOptimDelete() |
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| 210 | * |
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| 211 | * Used to delete the context for an optimization once it is finished |
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| 212 | * or no longer needed. Frees up the memory needed to store the |
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| 213 | * context and all input parameters. After this call, the context |
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| 214 | * should not be used again. |
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| 215 | * ---------------------------------------------------------------------- |
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| 216 | */ |
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| 217 | void |
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| 218 | RpOptimDelete(envPtr) |
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| 219 | RpOptimEnv *envPtr; /* context for this optimization */ |
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| 220 | { |
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| 221 | int n; |
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[897] | 222 | |
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[899] | 223 | if (envPtr->pluginDefn && envPtr->pluginDefn->cleanupProc) { |
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| 224 | (*envPtr->pluginDefn->cleanupProc)(envPtr->pluginData); |
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| 225 | } |
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[897] | 226 | for (n=0; n < envPtr->numParams; n++) { |
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| 227 | RpOptimCleanupParam(envPtr->paramList[n]); |
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| 228 | } |
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| 229 | free(envPtr->paramList); |
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| 230 | free(envPtr); |
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| 231 | } |
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| 232 | |
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| 233 | /* |
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| 234 | * ---------------------------------------------------------------------- |
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| 235 | * RpOptimCleanupParam() |
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| 236 | * |
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| 237 | * Used internally to free up the data associated with an optimization |
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| 238 | * parameter. Looks at the parameter type and frees up the appropriate |
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| 239 | * data. |
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| 240 | * ---------------------------------------------------------------------- |
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| 241 | */ |
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| 242 | static void |
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| 243 | RpOptimCleanupParam(paramPtr) |
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| 244 | RpOptimParam *paramPtr; /* data to be freed */ |
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| 245 | { |
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| 246 | int n; |
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[809] | 247 | RpOptimParamNumber *numPtr; |
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| 248 | RpOptimParamString *strPtr; |
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| 249 | |
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[897] | 250 | free(paramPtr->name); |
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| 251 | switch (paramPtr->type) { |
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| 252 | case RP_OPTIMPARAM_NUMBER: |
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| 253 | numPtr = (RpOptimParamNumber*)paramPtr; |
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| 254 | /* nothing special to free here */ |
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| 255 | break; |
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| 256 | case RP_OPTIMPARAM_STRING: |
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| 257 | strPtr = (RpOptimParamString*)paramPtr; |
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| 258 | if (strPtr->values) { |
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| 259 | for (n=0; strPtr->values[n]; n++) { |
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[809] | 260 | free(strPtr->values[n]); |
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| 261 | } |
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[897] | 262 | } |
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| 263 | break; |
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[809] | 264 | } |
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[897] | 265 | free(paramPtr); |
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[809] | 266 | } |
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