| 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
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| 3 | //
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| 4 | // The contents of this file are covered under the licence agreement in the
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| 5 | // file "LICENCE" distributed with Cforall.
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| 6 | //
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| 7 | // LineStream.cc -- Modified stream that inserts line directives into output.
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| 8 | //
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| 9 | // Author : Andrew Beach
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| 10 | // Created On : Thr May 4 13:15:00 2017
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| 11 | // Last Modified By : Andrew Beach
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| 12 | // Last Modified On : Fri May 5 14:29:00 2017
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| 13 | // Update Count : 0
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| 14 | //
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| 15 |
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| 16 | #include "LineStream.h"
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| 17 |
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| 18 | namespace CodeGen {
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| 19 |
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| 20 | LineStream::LineStream(std::ostream & baseStream, bool insertLines) :
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| 21 | baseStream(baseStream), insertLines(insertLines)
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| 22 | {}
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| 23 |
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| 24 | void LineStream::printLineDirective(CodeLocation const & location) {
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| 25 | baseStream << "\n# " << location.linenumber;
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| 26 | if (std::string("") != location.filename) {
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| 27 | baseStream << " \"" << location.filename << '"';
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| 28 | }
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| 29 | baseStream << '\n';
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| 30 | }
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| 31 |
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| 32 | bool LineStream::actualDiffersFromExpected() const {
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| 33 | return actualLocation.isSet() &&
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| 34 | // actualLocation & expectedLocation must match at the line.
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| 35 | (actualLocation.linenumber != expectedLocation.linenumber ||
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| 36 | actualLocation.filename != expectedLocation.filename);
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| 37 | }
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| 38 |
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| 39 | void LineStream::emptyBuffer(bool addNewline) {
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| 40 | if (actualDiffersFromExpected()) {
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| 41 | printLineDirective(actualLocation);
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| 42 | expectedLocation = actualLocation;
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| 43 | }
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| 44 | actualLocation.unset();
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| 45 |
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| 46 | if (addNewLine) {
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| 47 | expectedLocation.linenumber += 1;
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| 48 | buffer.put('\n');
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| 49 | }
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| 50 |
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| 51 | baseStream << buffer.str() << std::flush;
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| 52 | buffer.str("");
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| 53 | }
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| 54 |
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| 55 | void LineStream::setLoc(CodeLocation const & location) {
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| 56 | if (insertLines) {
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| 57 | if (expectedLocation.isUnset()) {
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| 58 | expectedLocation = actualLocation = location;
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| 59 | } else if (actualLocation.isUnset()) {
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| 60 | actualLocation = location;
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| 61 | } else if (actualLocation.filename != location.filename) {
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| 62 | emptyBuffer(true);
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| 63 | actualLocation = location;
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| 64 | } else if (location.linenumber <= actualLocation.linenumber){
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| 65 | actualLocation.linenumber = location.linenumber;
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| 66 | }
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| 67 | }
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| 68 | }
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| 69 |
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| 70 | LineStream & LineStream::operator<<(char const * str) {
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| 71 | buffer << str;
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| 72 | return *this;
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| 73 | }
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| 74 |
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| 75 | LineStream & LineStream::operator<<(std::string const & str) {
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| 76 | buffer << str;
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| 77 | return *this;
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| 78 | }
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| 79 |
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| 80 | LineStream & LineStream::operator<<(StreamFlag flag) {
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| 81 | static StringFlag const endlCopy = std::endl;
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| 82 | if (!insertLines) {
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| 83 | baseStream << flag;
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| 84 | } else if (endlCopy == flag) {
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| 85 | emptyBuffer(true);
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| 86 | } else {
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| 87 | buffer << flag;
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| 88 | }
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| 89 | return *this;
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| 90 | }
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| 91 |
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| 92 | LineStream & LineStream::flush() {
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| 93 | if (insertLines) {
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| 94 | emptyBuffer(false);
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| 95 | } else {
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| 96 | baseStream.flush();
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| 97 | }
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| 98 | return *this;
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| 99 | }
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| 100 |
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| 101 | } // CodeGen
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