113 lines
2.2 KiB
JavaScript
113 lines
2.2 KiB
JavaScript
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MAIN //
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/**
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* Generates a source code body for synchronous execution.
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*
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* ## Notes
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*
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* - Example output:
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*
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* ```javascript
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* "use strict";
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*
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* var ctx = this;
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* var t1, d1, i1;
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*
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* // {{before}}
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*
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* t1 = ctx.tic();
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* for ( i1 = 0; i1 < 1e6; i1++ ) {
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* // {{code}}
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* }
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* d1 = ctx.toc( t1 );
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*
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* // {{after}}
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*
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* ctx.done( null, d1 );
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*
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* return 1;
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* ```
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*
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*
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* @private
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* @param {number} id - id
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* @param {string} code - code to time
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* @param {Options} opts - function options
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* @param {string} opts.before - setup code
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* @param {string} opts.after - cleanup code
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* @param {PositiveInteger} opts.iterations - number of iterations
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* @returns {string} source code body
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*/
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function generate( id, code, opts ) {
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var src;
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var ctx;
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var t;
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var d;
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var i;
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src = '"use strict";';
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// Declare variables:
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ctx = '__ctx$'+id+'__';
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i = '__i$'+id+'__';
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t = '__t$'+id+'__';
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d = '__d$'+id+'__';
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src += 'var '+ctx+' = this;';
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src += 'var '+t+','+d+','+i+';';
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// Insert the setup code:
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src += opts.before+';';
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// Start the timer:
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src += t+' = '+ctx+'.tic();';
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// Create the loop:
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src += 'for ( '+i+'= 0; '+i+' < '+opts.iterations+'; '+i+'++ ) {';
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// Insert the loop body:
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src += code+';';
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// Close the loop:
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src += '}';
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// Stop the timer:
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src += d+' = '+ctx+'.toc( '+t+' );';
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// Insert the cleanup code:
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src += opts.after+';';
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// Return results:
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src += ctx+'.done( null, '+d+' );';
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// Return a value:
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src += 'return '+id+';';
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return src;
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}
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// EXPORTS //
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module.exports = generate;
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