larry babby and threejs for glsl

webGl/my-threejs-test/node_modules/@parcel/packager-wasm/lib/wasm-sourcemap.js

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+"use strict";
+
+/* eslint-disable */
+// Modified version of https://github.com/oasislabs/wasm-sourcemap/blob/77242f93ebd010cf69515d988b984244a119dd9d/index.js
+
+// Modifications Copyright 2019 Oasis Labs
+// Redistribution and use in source and binary forms, with or without modification, are permitted
+// provided that the following conditions are met:
+
+// 1. Redistributions of source code must retain the above copyright notice, this list of conditions
+//    and the following disclaimer.
+
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list of
+//    conditions and the following disclaimer in the documentation and/or other materials provided
+//    with the distribution.
+
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+// WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+const url = require('url');
+const section = 'sourceMappingURL';
+
+// read a variable uint encoding from the buffer stream.
+// return the int, and the next position in the stream.
+function read_uint(buf, pos) {
+  let n = 0;
+  let shift = 0;
+  let b = buf[pos];
+  let outpos = pos + 1;
+  while (b >= 128) {
+    n = n | b - 128 << shift;
+    b = buf[outpos];
+    outpos++;
+    shift += 7;
+  }
+  return [n + (b << shift), outpos];
+}
+
+// Write a buffer with a variable uint encoding of a number.
+function encode_uint(n) {
+  let result = [];
+  while (n > 127) {
+    result.push(128 | n & 127);
+    n = n >> 7;
+  }
+  result.push(n);
+  return new Uint8Array(result);
+}
+function ab2str(buf) {
+  let str = '';
+  let bytes = new Uint8Array(buf);
+  for (let i = 0; i < bytes.length; i++) {
+    str += String.fromCharCode(bytes[i]);
+  }
+  return str;
+}
+function str2ab(str) {
+  let bytes = new Uint8Array(str.length);
+  for (let i = 0; i < str.length; i++) {
+    bytes[i] = str[i].charCodeAt(0);
+  }
+  return bytes;
+}
+
+/**
+ * Construct an array buffer representing a WASM 0-id
+ * sections containing a given name and value pair.
+ * @param {String} name
+ * @param {String} value
+ * @returns {Uint8Array}
+ */
+function WriteSection(name, value, valLenOverride) {
+  const nameBuf = str2ab(name);
+  const valBuf = str2ab(value);
+  const nameLen = encode_uint(nameBuf.length);
+  const valLen = encode_uint(valLenOverride !== null && valLenOverride !== void 0 ? valLenOverride : valBuf.length);
+  const sectionLenDeclared = nameLen.length + nameBuf.length + valLen.length + (valLenOverride !== null && valLenOverride !== void 0 ? valLenOverride : valBuf.length);
+  const sectionLenActual = nameLen.length + nameBuf.length + valLen.length + valBuf.length;
+  const headerLen = encode_uint(sectionLenDeclared);
+  let bytes = new Uint8Array(sectionLenActual + headerLen.length + 1);
+  let pos = 1;
+  bytes.set(headerLen, pos);
+  pos += headerLen.length;
+  bytes.set(nameLen, pos);
+  pos += nameLen.length;
+  bytes.set(nameBuf, pos);
+  pos += nameBuf.length;
+  bytes.set(valLen, pos);
+  pos += valLen.length;
+  bytes.set(valBuf, pos);
+  return bytes;
+}
+
+/**
+ * Search the module sections of a WASM buffer to find
+ * a section with a given identifier.
+ * @param {Buffer} buf
+ * @param {String} id
+ * @returns {Array.<Number>} An array with the index of
+ *   the section, the length of the section, and the index
+ *   of the beginning of the body of the section.
+ */
+function FindSection(buf, id) {
+  let pos = 8;
+  while (pos < buf.byteLength) {
+    const sec_start = pos;
+    const [sec_id, pos2] = read_uint(buf, pos);
+    const [sec_size, body_pos] = read_uint(buf, pos2);
+    pos = body_pos + sec_size;
+    if (sec_id == 0) {
+      const [name_len, name_pos] = read_uint(buf, body_pos);
+      const name = buf.slice(name_pos, name_pos + name_len);
+      const nameString = ab2str(name);
+      if (nameString == id) {
+        return [sec_start, sec_size + 1 + (body_pos - pos2), name_pos + name_len];
+      }
+    }
+  }
+  return [-1, null, null];
+}
+module.exports = {
+  /**
+   * GetSourceMapURL extracts the source map from a WASM buffer.
+   * @param {Buffer} buf The WASM buffer
+   * @returns {String|null} The linked sourcemap URL if present.
+   */
+  GetSourceMapURL: function (buf) {
+    buf = new Uint8Array(buf);
+    const [sec_start, _, uri_start] = FindSection(buf, section);
+    if (sec_start == -1) {
+      return null;
+    }
+    const [uri_len, uri_pos] = read_uint(buf, uri_start);
+    return ab2str(buf.slice(uri_pos, uri_pos + uri_len));
+  },
+  RemoveSourceMapURL: function (buf) {
+    buf = new Uint8Array(buf);
+    const [sec_start, sec_size, _] = FindSection(buf, section);
+    if (sec_start == -1) {
+      return buf;
+    }
+    let strippedBuf = new Uint8Array(buf.length - sec_size);
+    strippedBuf.set(buf.slice(0, sec_start));
+    strippedBuf.set(buf.slice(sec_start + sec_size), sec_start);
+    return strippedBuf;
+  },
+  SetSourceMapURL: function (buf, url, urlLenOverride) {
+    const stripped = module.exports.RemoveSourceMapURL(buf);
+    const newSection = WriteSection(section, url, urlLenOverride);
+    const outBuf = new Uint8Array(stripped.length + newSection.length);
+    outBuf.set(stripped);
+    outBuf.set(newSection, stripped.length);
+    return outBuf;
+  },
+  SetSourceMapURLRelativeTo: function (buf, relativeURL) {
+    const originalURL = module.exports.GetSourceMapURL(buf);
+    const newURL = url.resolve(relativeURL, originalURL);
+    return module.exports.SetSourceMapURL(buf, newURL);
+  }
+};