mirror of
https://bitbucket.org/CPMADevs/cnq3
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387 lines
7.9 KiB
C++
387 lines
7.9 KiB
C++
/*
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===========================================================================
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Copyright (C) 2017-2019 Gian 'myT' Schellenbaum
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This file is part of Challenge Quake 3 (CNQ3).
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Challenge Quake 3 is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Challenge Quake 3 is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Challenge Quake 3. If not, see <https://www.gnu.org/licenses/>.
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===========================================================================
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*/
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// writing JSON to files without dynamic memory allocation etc for crash reports
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#include "crash.h"
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#if defined(_MSC_VER)
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typedef unsigned __int8 u8;
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typedef unsigned __int32 u32;
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#else
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typedef uint8_t u8;
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typedef uint32_t u32;
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#endif
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static qbool UTF8_NextCodePoint(u32* codePoint, u32* byteCount, const char* input)
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{
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if (!codePoint || !byteCount || !input || *input == '\0')
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return qfalse;
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u8 byte0 = (u8)input[0];
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if (byte0 <= 127) {
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*codePoint = (u32)byte0;
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*byteCount = 1;
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return qtrue;
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}
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// Starts with 110?
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if ((byte0 >> 5) == 6) {
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const u8 byte1 = (u8)input[1];
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*codePoint = ((u32)byte1 & 63) | (((u32)byte0 & 31) << 6);
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*byteCount = 2;
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return qtrue;
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}
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// Starts with 1110?
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if ((byte0 >> 4) == 14) {
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const u8 byte1 = (u8)input[1];
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const u8 byte2 = (u8)input[2];
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*codePoint = ((u32)byte2 & 63) | (((u32)byte1 & 63) << 6) | (((u32)byte0 & 15) << 12);
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*byteCount = 3;
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return qtrue;
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}
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// Starts with 11110?
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if ((byte0 >> 3) == 30) {
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const u8 byte1 = (u8)input[1];
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const u8 byte2 = (u8)input[2];
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const u8 byte3 = (u8)input[3];
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*codePoint = ((u32)byte3 & 63) | (((u32)byte2 & 63) << 6) | (((u32)byte1 & 63) << 12) | (((u32)byte0 & 7) << 18);
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*byteCount = 4;
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return qtrue;
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}
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return qfalse;
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}
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typedef struct {
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u32 CodePoint;
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char OutputChar;
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} ShortEscape;
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#define ENTRY(HexValue, Char) { 0x##HexValue, Char }
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static const ShortEscape ShortEscapeCodePoints[] = {
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ENTRY(0022, '"'),
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ENTRY(005C, '\\'),
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ENTRY(002F, '/'),
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ENTRY(0008, 'b'),
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ENTRY(000C, 'f'),
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ENTRY(000A, 'n'),
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ENTRY(000D, 'r'),
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ENTRY(0009, 't')
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};
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#undef ENTRY
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static const char HexDigits[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
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static qbool UTF8_NeedsEscaping(u32* newLength, u32 codePoint)
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{
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if (!newLength)
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return qfalse;
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const u32 count = (u32)ARRAY_LEN(ShortEscapeCodePoints);
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for (u32 i = 0; i < count; i++) {
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if (codePoint == ShortEscapeCodePoints[i].CodePoint) {
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*newLength = 2; // Of form: "\A".
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return qtrue;
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}
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}
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// Range: 0x0000 - 0x001F
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if (codePoint <= 0x001F) {
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*newLength = 6; // Of form: "\uABCD".
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return qtrue;
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}
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return qfalse;
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}
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static void UTF8_WriteCodePoint(u32* newLength, char* output, u32 codePoint, const char* input)
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{
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if (!newLength || !output || !input)
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return;
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const u32 count = (u32)ARRAY_LEN(ShortEscapeCodePoints);
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for (u32 i = 0; i < count; i++) {
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if (codePoint == ShortEscapeCodePoints[i].CodePoint) {
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*newLength = 2;
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output[0] = '\\';
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output[1] = ShortEscapeCodePoints[i].OutputChar;
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return;
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}
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}
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// Range: 0x0000 - 0x001F
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if (codePoint <= 0x001F) {
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*newLength = 6;
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output[0] = '\\';
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output[1] = 'u';
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output[2] = HexDigits[(codePoint >> 12) & 15];
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output[3] = HexDigits[(codePoint >> 8) & 15];
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output[4] = HexDigits[(codePoint >> 4) & 15];
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output[5] = HexDigits[codePoint & 15];
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return;
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}
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for (u32 i = 0; i < *newLength; ++i) {
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output[i] = input[i];
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}
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}
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static u32 UTF8_LengthForJSON(const char* input)
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{
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if (!input)
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return 0;
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const char* s = input;
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u32 codePoint = 0;
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u32 byteCount = 0;
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u32 newLength = 0;
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while (UTF8_NextCodePoint(&codePoint, &byteCount, s)) {
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s += byteCount;
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UTF8_NeedsEscaping(&byteCount, codePoint);
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newLength += byteCount;
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}
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return newLength;
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}
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static void UTF8_CleanForJSON(char* output, const char* input)
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{
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if (!output || !input)
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return;
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const char* in = input;
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char* out = output;
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u32 codePoint = 0;
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u32 inputByteCount = 0;
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while (UTF8_NextCodePoint(&codePoint, &inputByteCount, in)) {
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u32 outputByteCount = inputByteCount;
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UTF8_WriteCodePoint(&outputByteCount, out, codePoint, in);
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in += inputByteCount;
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out += outputByteCount;
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}
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*out = '\0';
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}
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typedef struct {
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unsigned int itemIndices[16];
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FILE* file;
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unsigned int level;
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} JSONWriter;
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static JSONWriter writer;
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static void JSONW_Write(const char* string)
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{
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if (!string)
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return;
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fwrite(string, strlen(string), 1, writer.file);
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}
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static void JSONW_WriteNewLine()
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{
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JSONW_Write("\n");
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for (u32 i = 0; i < writer.level; i++) {
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JSONW_Write("\t");
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}
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}
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static void JSONW_WriteClean(const char* string)
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{
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static char buffer[4096];
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if (!string)
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return;
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const u32 length = UTF8_LengthForJSON(string);
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if (length >= sizeof(buffer)) {
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JSONW_Write("bufferSizeTooSmall");
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return;
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}
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UTF8_CleanForJSON(buffer, string);
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JSONW_Write(buffer);
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}
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void JSONW_BeginFile(FILE* file)
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{
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memset(&writer, 0, sizeof(writer));
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writer.file = file;
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JSONW_Write("{");
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++writer.level;
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}
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void JSONW_EndFile()
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{
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JSONW_Write("\r\n}");
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}
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void JSONW_BeginObject()
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{
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if (writer.itemIndices[writer.level] > 0)
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JSONW_Write(",");
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JSONW_WriteNewLine();
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JSONW_Write("{");
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++writer.level;
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writer.itemIndices[writer.level] = 0;
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}
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void JSONW_BeginNamedObject(const char* name)
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{
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if (!name)
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return;
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if (writer.itemIndices[writer.level] > 0)
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JSONW_Write(",");
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JSONW_WriteNewLine();
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JSONW_Write("\"");
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JSONW_WriteClean(name);
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JSONW_Write("\":");
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JSONW_WriteNewLine();
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JSONW_Write("{");
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++writer.level;
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writer.itemIndices[writer.level] = 0;
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}
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void JSONW_EndObject()
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{
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--writer.level;
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JSONW_WriteNewLine();
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JSONW_Write("}");
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++writer.itemIndices[writer.level];
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}
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void JSONW_BeginArray()
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{
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if (writer.itemIndices[writer.level] > 0)
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JSONW_Write(",");
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JSONW_WriteNewLine();
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JSONW_Write("[");
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++writer.level;
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writer.itemIndices[writer.level] = 0;
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}
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void JSONW_BeginNamedArray(const char* name)
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{
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if (!name)
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return;
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if (writer.itemIndices[writer.level] > 0)
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JSONW_Write(",");
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JSONW_WriteNewLine();
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JSONW_Write("\"");
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JSONW_WriteClean(name);
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JSONW_Write("\":");
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JSONW_WriteNewLine();
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JSONW_Write("[");
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++writer.level;
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writer.itemIndices[writer.level] = 0;
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}
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void JSONW_EndArray()
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{
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--writer.level;
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JSONW_WriteNewLine();
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JSONW_Write("]");
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++writer.itemIndices[writer.level];
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}
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void JSONW_IntegerValue(const char* name, int number)
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{
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if (!name)
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return;
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JSONW_StringValue(name, "%d", number);
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}
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void JSONW_HexValue(const char* name, uint64_t number)
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{
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if (!name)
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return;
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JSONW_StringValue(name, Q_itohex(number, qtrue, qtrue));
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}
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void JSONW_BooleanValue(const char* name, qbool value)
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{
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JSONW_StringValue(name, value ? "true" : "false");
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}
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void JSONW_StringValue(const char* name, const char* format, ...)
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{
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static char buffer[4096];
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if (!name || !format || *format == '\0')
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return;
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va_list ap;
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va_start(ap, format);
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Q_vsnprintf(buffer, sizeof(buffer), format, ap);
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va_end(ap);
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if (writer.itemIndices[writer.level] > 0)
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JSONW_Write(", ");
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JSONW_WriteNewLine();
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JSONW_Write("\"");
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JSONW_Write(name);
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JSONW_Write("\": \"");
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JSONW_WriteClean(buffer);
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JSONW_Write("\"");
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++writer.itemIndices[writer.level];
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}
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void JSONW_UnnamedHex(uint64_t number)
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{
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JSONW_UnnamedString(Q_itohex(number, qtrue, qtrue));
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}
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void JSONW_UnnamedString(const char* format, ...)
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{
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static char buffer[4096];
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if (!format || *format == '\0')
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return;
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va_list ap;
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va_start(ap, format);
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Q_vsnprintf(buffer, sizeof(buffer), format, ap);
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va_end(ap);
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if (writer.itemIndices[writer.level] > 0)
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JSONW_Write(", ");
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JSONW_WriteNewLine();
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JSONW_Write("\"");
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JSONW_WriteClean(buffer);
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JSONW_Write("\"");
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++writer.itemIndices[writer.level];
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}
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