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Change-Id: I6cbe123d09fe50fdcad0e51466665daeee7433c7
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git-subtree-split: e35e24800fb8d694bdeea5fd63dc7d1b14d68723
diff --git a/src/google/protobuf/io/printer.cc b/src/google/protobuf/io/printer.cc
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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * 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.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// 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
+// OWNER 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.
+
+// Author: kenton@google.com (Kenton Varda)
+// Based on original Protocol Buffers design by
+// Sanjay Ghemawat, Jeff Dean, and others.
+
+#include <google/protobuf/io/printer.h>
+#include <google/protobuf/io/zero_copy_stream.h>
+#include <google/protobuf/stubs/logging.h>
+#include <google/protobuf/stubs/common.h>
+
+namespace google {
+namespace protobuf {
+namespace io {
+
+Printer::Printer(ZeroCopyOutputStream* output, char variable_delimiter)
+ : variable_delimiter_(variable_delimiter),
+ output_(output),
+ buffer_(NULL),
+ buffer_size_(0),
+ at_start_of_line_(true),
+ failed_(false) {
+}
+
+Printer::~Printer() {
+ // Only BackUp() if we have called Next() at least once and never failed.
+ if (buffer_size_ > 0 && !failed_) {
+ output_->BackUp(buffer_size_);
+ }
+}
+
+void Printer::Print(const map<string, string>& variables, const char* text) {
+ int size = strlen(text);
+ int pos = 0; // The number of bytes we've written so far.
+
+ for (int i = 0; i < size; i++) {
+ if (text[i] == '\n') {
+ // Saw newline. If there is more text, we may need to insert an indent
+ // here. So, write what we have so far, including the '\n'.
+ WriteRaw(text + pos, i - pos + 1);
+ pos = i + 1;
+
+ // Setting this true will cause the next WriteRaw() to insert an indent
+ // first.
+ at_start_of_line_ = true;
+
+ } else if (text[i] == variable_delimiter_) {
+ // Saw the start of a variable name.
+
+ // Write what we have so far.
+ WriteRaw(text + pos, i - pos);
+ pos = i + 1;
+
+ // Find closing delimiter.
+ const char* end = strchr(text + pos, variable_delimiter_);
+ if (end == NULL) {
+ GOOGLE_LOG(DFATAL) << " Unclosed variable name.";
+ end = text + pos;
+ }
+ int endpos = end - text;
+
+ string varname(text + pos, endpos - pos);
+ if (varname.empty()) {
+ // Two delimiters in a row reduce to a literal delimiter character.
+ WriteRaw(&variable_delimiter_, 1);
+ } else {
+ // Replace with the variable's value.
+ map<string, string>::const_iterator iter = variables.find(varname);
+ if (iter == variables.end()) {
+ GOOGLE_LOG(DFATAL) << " Undefined variable: " << varname;
+ } else {
+ WriteRaw(iter->second.data(), iter->second.size());
+ }
+ }
+
+ // Advance past this variable.
+ i = endpos;
+ pos = endpos + 1;
+ }
+ }
+
+ // Write the rest.
+ WriteRaw(text + pos, size - pos);
+}
+
+void Printer::Print(const char* text) {
+ static map<string, string> empty;
+ Print(empty, text);
+}
+
+void Printer::Print(const char* text,
+ const char* variable, const string& value) {
+ map<string, string> vars;
+ vars[variable] = value;
+ Print(vars, text);
+}
+
+void Printer::Print(const char* text,
+ const char* variable1, const string& value1,
+ const char* variable2, const string& value2) {
+ map<string, string> vars;
+ vars[variable1] = value1;
+ vars[variable2] = value2;
+ Print(vars, text);
+}
+
+void Printer::Print(const char* text,
+ const char* variable1, const string& value1,
+ const char* variable2, const string& value2,
+ const char* variable3, const string& value3) {
+ map<string, string> vars;
+ vars[variable1] = value1;
+ vars[variable2] = value2;
+ vars[variable3] = value3;
+ Print(vars, text);
+}
+
+void Printer::Print(const char* text,
+ const char* variable1, const string& value1,
+ const char* variable2, const string& value2,
+ const char* variable3, const string& value3,
+ const char* variable4, const string& value4) {
+ map<string, string> vars;
+ vars[variable1] = value1;
+ vars[variable2] = value2;
+ vars[variable3] = value3;
+ vars[variable4] = value4;
+ Print(vars, text);
+}
+
+void Printer::Print(const char* text,
+ const char* variable1, const string& value1,
+ const char* variable2, const string& value2,
+ const char* variable3, const string& value3,
+ const char* variable4, const string& value4,
+ const char* variable5, const string& value5) {
+ map<string, string> vars;
+ vars[variable1] = value1;
+ vars[variable2] = value2;
+ vars[variable3] = value3;
+ vars[variable4] = value4;
+ vars[variable5] = value5;
+ Print(vars, text);
+}
+
+void Printer::Print(const char* text,
+ const char* variable1, const string& value1,
+ const char* variable2, const string& value2,
+ const char* variable3, const string& value3,
+ const char* variable4, const string& value4,
+ const char* variable5, const string& value5,
+ const char* variable6, const string& value6) {
+ map<string, string> vars;
+ vars[variable1] = value1;
+ vars[variable2] = value2;
+ vars[variable3] = value3;
+ vars[variable4] = value4;
+ vars[variable5] = value5;
+ vars[variable6] = value6;
+ Print(vars, text);
+}
+
+void Printer::Print(const char* text,
+ const char* variable1, const string& value1,
+ const char* variable2, const string& value2,
+ const char* variable3, const string& value3,
+ const char* variable4, const string& value4,
+ const char* variable5, const string& value5,
+ const char* variable6, const string& value6,
+ const char* variable7, const string& value7) {
+ map<string, string> vars;
+ vars[variable1] = value1;
+ vars[variable2] = value2;
+ vars[variable3] = value3;
+ vars[variable4] = value4;
+ vars[variable5] = value5;
+ vars[variable6] = value6;
+ vars[variable7] = value7;
+ Print(vars, text);
+}
+
+void Printer::Print(const char* text,
+ const char* variable1, const string& value1,
+ const char* variable2, const string& value2,
+ const char* variable3, const string& value3,
+ const char* variable4, const string& value4,
+ const char* variable5, const string& value5,
+ const char* variable6, const string& value6,
+ const char* variable7, const string& value7,
+ const char* variable8, const string& value8) {
+ map<string, string> vars;
+ vars[variable1] = value1;
+ vars[variable2] = value2;
+ vars[variable3] = value3;
+ vars[variable4] = value4;
+ vars[variable5] = value5;
+ vars[variable6] = value6;
+ vars[variable7] = value7;
+ vars[variable8] = value8;
+ Print(vars, text);
+}
+
+void Printer::Indent() {
+ indent_ += " ";
+}
+
+void Printer::Outdent() {
+ if (indent_.empty()) {
+ GOOGLE_LOG(DFATAL) << " Outdent() without matching Indent().";
+ return;
+ }
+
+ indent_.resize(indent_.size() - 2);
+}
+
+void Printer::PrintRaw(const string& data) {
+ WriteRaw(data.data(), data.size());
+}
+
+void Printer::PrintRaw(const char* data) {
+ if (failed_) return;
+ WriteRaw(data, strlen(data));
+}
+
+void Printer::WriteRaw(const char* data, int size) {
+ if (failed_) return;
+ if (size == 0) return;
+
+ if (at_start_of_line_ && (size > 0) && (data[0] != '\n')) {
+ // Insert an indent.
+ at_start_of_line_ = false;
+ WriteRaw(indent_.data(), indent_.size());
+ if (failed_) return;
+ }
+
+ while (size > buffer_size_) {
+ // Data exceeds space in the buffer. Copy what we can and request a
+ // new buffer.
+ memcpy(buffer_, data, buffer_size_);
+ data += buffer_size_;
+ size -= buffer_size_;
+ void* void_buffer;
+ failed_ = !output_->Next(&void_buffer, &buffer_size_);
+ if (failed_) return;
+ buffer_ = reinterpret_cast<char*>(void_buffer);
+ }
+
+ // Buffer is big enough to receive the data; copy it.
+ memcpy(buffer_, data, size);
+ buffer_ += size;
+ buffer_size_ -= size;
+}
+
+} // namespace io
+} // namespace protobuf
+} // namespace google