dev testing

functions/node_modules/fast-xml-parser/src/v6/inputSource/StringSource.js

@@ -0,0 +1,121 @@
+const whiteSpaces = [" ", "\n", "\t"];
+
+
+export default class StringSource{
+  constructor(str){
+    this.line = 1;
+    this.cols = 0;
+    this.buffer = str;
+    //a boundary pointer to indicate where from the buffer dat should be read
+    // data before this pointer can be deleted to free the memory
+    this.startIndex = 0;
+  }
+
+  readCh() {
+    return this.buffer[this.startIndex++];
+  }
+
+  readChAt(index) {
+    return this.buffer[this.startIndex+index];
+  }
+
+  readStr(n,from){
+    if(typeof from === "undefined") from = this.startIndex;
+    return this.buffer.substring(from, from + n);
+  }
+
+  readUpto(stopStr) {
+    const inputLength = this.buffer.length;
+    const stopLength = stopStr.length;
+
+    for (let i = this.startIndex; i < inputLength; i++) {
+      let match = true;
+      for (let j = 0; j < stopLength; j++) {
+        if (this.buffer[i + j] !== stopStr[j]) {
+          match = false;
+          break;
+        }
+      }
+
+      if (match) {
+        const result = this.buffer.substring(this.startIndex, i);
+        this.startIndex = i + stopLength;
+        return result;
+      }
+    }
+
+    throw new Error(`Unexpected end of source. Reading '${stopStr}'`);
+  }
+
+  readUptoCloseTag(stopStr) { //stopStr: "</tagname"
+    const inputLength = this.buffer.length;
+    const stopLength = stopStr.length;
+    let stopIndex = 0;
+    //0: non-matching, 1: matching stop string, 2: matching closing
+    let match = 0;
+
+    for (let i = this.startIndex; i < inputLength; i++) {
+      if(match === 1){//initial part matched
+        if(stopIndex === 0) stopIndex = i;
+        if(this.buffer[i] === ' ' || this.buffer[i] === '\t') continue;
+        else if(this.buffer[i] === '>'){
+          match = 2;
+          //tag boundary found
+          // this.startIndex
+        }
+      }else{
+        match = 1;
+        for (let j = 0; j < stopLength; j++) {
+          if (this.buffer[i + j] !== stopStr[j]) {
+            match = 0;
+            break;
+          }
+        }
+      }
+      if (match === 2) {//matched closing part
+        const result = this.buffer.substring(this.startIndex, stopIndex - 1 );
+        this.startIndex = i + 1;
+        return result;
+      }
+    }
+
+    throw new Error(`Unexpected end of source. Reading '${stopStr}'`);
+  }
+
+  readFromBuffer(n, updateIndex){
+    let ch;
+    if(n===1){
+      ch = this.buffer[this.startIndex];
+      // if(ch === "\n") {
+      //   this.line++;
+      //   this.cols = 1;
+      // }else{
+      //   this.cols++;
+      // }
+    }else{
+      ch = this.buffer.substring(this.startIndex, this.startIndex + n);
+      // if("".indexOf("\n") !== -1){
+      //   //TODO: handle the scenario when there are multiple lines
+      //   //TODO: col should be set to number of chars after last '\n'
+      //   // this.cols = 1;
+      // }else{
+      //   this.cols += n;
+
+      // }
+    }
+    if(updateIndex) this.updateBufferBoundary(n);
+    return ch;
+  }
+
+  //TODO: rename to updateBufferReadIndex
+  
+  updateBufferBoundary(n = 1) { //n: number of characters read
+    this.startIndex += n;
+  }
+
+  canRead(n){
+    n = n || this.startIndex;
+    return this.buffer.length - n + 1 > 0;
+  }
+  
+}