All files / src/abap/2_statements expand_macros.ts

98.21% Statements 110/112
92.31% Branches 48/52
100% Functions 12/12
98.18% Lines 108/110

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 2061x 1x 1x 1x   1x   1x 1x 1x 1x           5071x 5071x 38x         35x     35x       37x       26x       354x 37x   317x       1x         5071x 5071x       5089x 5089x   5089x 12446x   12446x   46x 46x 12400x 73x 35x 35x 38x 38x 38x             5126x 5126x   5126x 12485x 319x 319x 37x   37x 37x 37x 46x   37x       37x   282x     12448x     5126x           37x 37x 11x     26x 26x 39x 39x   1x   39x     26x 26x 26x 13x 13x 13x 13x     26x 26x   26x 26x       26x 26x   26x 26x 19x 19x 19x 8x       19x 19x 8x   11x     19x 6x   13x 13x 13x       26x       319x 319x 319x 634x 253x 381x 326x 319x   7x   55x 1x   54x   326x   319x       75x   75x 258x     75x      
import * as Statements from "./statements";
import * as Tokens from "../1_lexer/tokens";
import {MacroContent, Comment, Unknown, MacroCall} from "./statements/_statement";
import {StatementNode} from "../nodes/statement_node";
import {Token} from "../1_lexer/tokens/_token";
import {TokenNode} from "../nodes/token_node";
import {Version} from "../../version";
import {StatementParser} from "./statement_parser";
import {MemoryFile} from "../../files/memory_file";
import {Lexer} from "../1_lexer/lexer";
import {VirtualPosition} from "../../position";
 
class Macros {
  private readonly macros: {[index: string]: StatementNode[]};
 
  public constructor(globalMacros: readonly string[]) {
    this.macros = {};
    for (const m of globalMacros) {
      this.macros[m.toUpperCase()] = [];
    }
  }
 
  public addMacro(name: string, contents: StatementNode[]): void {
    Iif (this.isMacro(name)) {
      return;
    }
    this.macros[name.toUpperCase()] = contents;
  }
 
  public getContents(name: string): StatementNode[] | undefined {
    return this.macros[name.toUpperCase()];
  }
 
  public listMacroNames(): string[] {
    return Object.keys(this.macros);
  }
 
  public isMacro(name: string): boolean {
    if (this.macros[name.toUpperCase()]) {
      return true;
    }
    return false;
  }
}
 
export class ExpandMacros {
  private readonly macros: Macros;
  private readonly version: Version;
 
  public constructor(globalMacros: readonly string[], version: Version) {
    this.macros = new Macros(globalMacros);
    this.version = version;
  }
 
  public find(statements: StatementNode[]) {
    let name: string | undefined = undefined;
    let contents: StatementNode[] = [];
 
    for (let i = 0; i < statements.length; i++) {
      const statement = statements[i];
 
      if (statement.get() instanceof Statements.Define) {
        // todo, will this break if first token is a pragma?
        name = statement.getTokens()[1].getStr();
        contents = [];
      } else if (name) {
        if (statement.get() instanceof Statements.EndOfDefinition) {
          this.macros.addMacro(name, contents);
          name = undefined;
        } else Eif (!(statement.get() instanceof Comment)) {
          statements[i] = new StatementNode(new MacroContent()).setChildren(this.tokensToNodes(statement.getTokens()));
          contents.push(statements[i]);
        }
      }
    }
  }
 
  public handleMacros(statements: readonly StatementNode[]): {statements: StatementNode[], containsUnknown: boolean} {
    const result: StatementNode[] = [];
    let containsUnknown = false;
 
    for (const statement of statements) {
      if (statement.get() instanceof Unknown || statement.get() instanceof MacroCall) {
        const macroName = this.findName(statement.getTokens());
        if (macroName && this.macros.isMacro(macroName)) {
          result.push(new StatementNode(new MacroCall()).setChildren(this.tokensToNodes(statement.getTokens())));
 
          const expanded = this.expandContents(macroName, statement);
          const handled = this.handleMacros(expanded);
          for (const e of handled.statements) {
            result.push(e);
          }
          Iif (handled.containsUnknown === true) {
            containsUnknown = true;
          }
 
          continue;
        } else {
          containsUnknown = true;
        }
      }
      result.push(statement);
    }
 
    return {statements: result, containsUnknown};
  }
 
  //////////////
 
  private expandContents(name: string, statement: StatementNode): readonly StatementNode[] {
    const contents = this.macros.getContents(name);
    if (contents === undefined || contents.length === 0) {
      return [];
    }
 
    let str = "";
    for (const c of contents) {
      let concat = c.concatTokens();
      if (c.getTerminator() === ",") {
        // workaround for chained statements
        concat = concat.replace(/,$/, ".");
      }
      str += concat + "\n";
    }
 
    const inputs = this.buildInput(statement);
    let i = 1;
    for (const input of inputs) {
      const search = "&" + i;
      const reg = new RegExp(search, "g");
      str = str.replace(reg, input);
      i++;
    }
 
    const file = new MemoryFile("expand_macros.abap.prog", str);
    const lexerResult = Lexer.run(file, statement.getFirstToken().getStart());
 
    const result = new StatementParser(this.version).run([lexerResult], this.macros.listMacroNames());
    return result[0].statements;
  }
 
  private buildInput(statement: StatementNode): string[] {
    const result: string[] = [];
    const tokens = statement.getTokens();
 
    let build = "";
    for (let i = 1; i < tokens.length - 1; i++) {
      const now = tokens[i];
      let next: Token | undefined = tokens[i + 1];
      if (i + 2 === tokens.length) {
        next = undefined; // dont take the punctuation
      }
 
      // argh, macros is a nightmare
      let end = now.getStart();
      if (end instanceof VirtualPosition) {
        end = new VirtualPosition(end, end.vrow, end.vcol + now.getStr().length);
      } else {
        end = now.getEnd();
      }
 
      if (next && next.getStart().equals(end)) {
        build += now.getStr();
      } else {
        build += now.getStr();
        result.push(build);
        build = "";
      }
    }
 
    return result;
  }
 
  private findName(tokens: readonly Token[]): string | undefined {
    let macroName: string | undefined = undefined;
    let previous: Token | undefined = undefined;
    for (const i of tokens) {
      if (previous && previous?.getEnd().getCol() !== i.getStart().getCol()) {
        break;
      } else if (i instanceof Tokens.Identifier || i.getStr() === "-") {
        if (macroName === undefined) {
          macroName = i.getStr();
        } else {
          macroName += i.getStr();
        }
      } else if (i instanceof Tokens.Pragma) {
        continue;
      } else {
        break;
      }
      previous = i;
    }
    return macroName;
  }
 
  private tokensToNodes(tokens: readonly Token[]): TokenNode[] {
    const ret: TokenNode[] = [];
 
    for (const t of tokens) {
      ret.push(new TokenNode(t));
    }
 
    return ret;
  }
 
}