--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2011 Jose Fonseca
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/*
+ * Trace writing functions.
+ */
+
+#ifndef _JSON_HPP_
+#define _JSON_HPP_
+
+#include <assert.h>
+#include <stddef.h>
+#include <wchar.h>
+
+#include <iomanip>
+#include <ostream>
+#include <string>
+
+
+class JSONWriter
+{
+private:
+ std::ostream &os;
+
+ int level;
+ bool value;
+ char space;
+
+ void newline(void) {
+ os << "\n";
+ for (int i = 0; i < level; ++i)
+ os << " ";
+ }
+
+ void separator(void) {
+ if (value) {
+ os << ",";
+ switch (space) {
+ case '\0':
+ break;
+ case '\n':
+ newline();
+ break;
+ default:
+ os << space;
+ break;
+ }
+ } else {
+ if (space == '\n') {
+ newline();
+ }
+ }
+ }
+
+ void escapeAsciiString(const char *str) {
+ os << "\"";
+
+ const unsigned char *src = (const unsigned char *)str;
+ unsigned char c;
+ while ((c = *src++)) {
+ if ((c == '\"') ||
+ (c == '\\')) {
+ // escape character
+ os << '\\' << (unsigned char)c;
+ } else if ((c >= 0x20 && c <= 0x7e) ||
+ c == '\t' ||
+ c == '\r' ||
+ c == '\n') {
+ // pass-through character
+ os << (unsigned char)c;
+ } else {
+ assert(0);
+ os << "?";
+ }
+ }
+
+ os << "\"";
+ }
+
+ void escapeUnicodeString(const char *str) {
+ os << "\"";
+
+ const char *locale = setlocale(LC_CTYPE, "");
+ const char *src = str;
+ mbstate_t state;
+
+ memset(&state, 0, sizeof state);
+
+ do {
+ // Convert characters one at a time in order to recover from
+ // conversion errors
+ wchar_t c;
+ size_t written = mbsrtowcs(&c, &src, 1, &state);
+ if (written == 0) {
+ // completed
+ break;
+ } if (written == (size_t)-1) {
+ // conversion error -- skip
+ os << "?";
+ do {
+ ++src;
+ } while (*src & 0x80);
+ } else if ((c == '\"') ||
+ (c == '\\')) {
+ // escape character
+ os << '\\' << (unsigned char)c;
+ } else if ((c >= 0x20 && c <= 0x7e) ||
+ c == '\t' ||
+ c == '\r' ||
+ c == '\n') {
+ // pass-through character
+ os << (unsigned char)c;
+ } else {
+ // unicode
+ os << "\\u" << std::setfill('0') << std::hex << std::setw(4) << (unsigned)c;
+ os << std::dec;
+ }
+ } while (src);
+
+ setlocale(LC_CTYPE, locale);
+
+ os << "\"";
+ }
+
+ void encodeBase64String(const unsigned char *bytes, size_t size) {
+ const char *table64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ unsigned char c0, c1, c2, c3;
+ char buf[4];
+ unsigned written;
+
+ os << "\"";
+
+ written = 0;
+ while (size >= 3) {
+ c0 = bytes[0] >> 2;
+ c1 = ((bytes[0] & 0x03) << 4) | ((bytes[1] & 0xf0) >> 4);
+ c2 = ((bytes[1] & 0x0f) << 2) | ((bytes[2] & 0xc0) >> 6);
+ c3 = bytes[2] & 0x3f;
+
+ buf[0] = table64[c0];
+ buf[1] = table64[c1];
+ buf[2] = table64[c2];
+ buf[3] = table64[c3];
+
+ os.write(buf, 4);
+
+ bytes += 3;
+ size -= 3;
+ ++written;
+
+ if (written >= 76/4 && size) {
+ os << "\n";
+ written = 0;
+ }
+ }
+
+ if (size > 0) {
+ c0 = bytes[0] >> 2;
+ c1 = ((bytes[0] & 0x03) << 4);
+ buf[2] = '=';
+ buf[3] = '=';
+
+ if (size > 1) {
+ c1 |= ((bytes[1] & 0xf0) >> 4);
+ c2 = ((bytes[1] & 0x0f) << 2);
+ if (size > 2) {
+ c2 |= ((bytes[2] & 0xc0) >> 6);
+ c3 = bytes[2] & 0x3f;
+ buf[3] = table64[c3];
+ }
+ buf[2] = table64[c2];
+ }
+ buf[1] = table64[c1];
+ buf[0] = table64[c0];
+
+ os.write(buf, 4);
+ }
+
+ os << "\"";
+ }
+
+public:
+ JSONWriter(std::ostream &_os) :
+ os(_os),
+ level(0),
+ value(false),
+ space(0)
+ {
+ beginObject();
+ }
+
+ ~JSONWriter() {
+ endObject();
+ newline();
+ }
+
+ inline void beginObject() {
+ separator();
+ os << "{";
+ ++level;
+ value = false;
+ }
+
+ inline void endObject() {
+ --level;
+ if (value)
+ newline();
+ os << "}";
+ value = true;
+ space = '\n';
+ }
+
+ inline void beginMember(const char * name) {
+ space = 0;
+ separator();
+ newline();
+ escapeAsciiString(name);
+ os << ": ";
+ value = false;
+ }
+
+ inline void beginMember(const std::string &name) {
+ beginMember(name.c_str());
+ }
+
+ inline void endMember(void) {
+ assert(value);
+ value = true;
+ space = 0;
+ }
+
+ inline void beginArray() {
+ separator();
+ os << "[";
+ ++level;
+ value = false;
+ space = 0;
+ }
+
+ inline void endArray(void) {
+ --level;
+ if (space == '\n') {
+ newline();
+ }
+ os << "]";
+ value = true;
+ space = '\n';
+ }
+
+ inline void writeString(const char *s) {
+ separator();
+ escapeUnicodeString(s);
+ value = true;
+ space = ' ';
+ }
+
+ inline void writeString(const std::string &s) {
+ writeString(s.c_str());
+ }
+
+ inline void writeBase64(const void *bytes, size_t size) {
+ separator();
+ encodeBase64String((const unsigned char *)bytes, size);
+ value = true;
+ space = ' ';
+ }
+
+ inline void writeNull(void) {
+ separator();
+ os << "null";
+ value = true;
+ space = ' ';
+ }
+
+ inline void writeBool(bool b) {
+ separator();
+ os << (b ? "true" : "false");
+ value = true;
+ space = ' ';
+ }
+
+ template<class T>
+ inline void writeNumber(T n) {
+ if (n != n) {
+ // NaN
+ writeNull();
+ } else {
+ separator();
+ os << std::dec << std::setprecision(9) << n;
+ value = true;
+ space = ' ';
+ }
+ }
+
+ inline void writeStringMember(const char *name, const char *s) {
+ beginMember(name);
+ writeString(s);
+ endMember();
+ }
+
+ inline void writeBoolMember(const char *name, bool b) {
+ beginMember(name);
+ writeBool(b);
+ endMember();
+ }
+
+ template<class T>
+ inline void writeNumberMember(const char *name, T n) {
+ beginMember(name);
+ writeNumber(n);
+ endMember();
+ }
+};
+
+#endif /* _JSON_HPP_ */
projects / apitrace / blobdiff