683 lines
26 KiB
C
683 lines
26 KiB
C
/**********************************************************************************************
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raylib parser - raylib header parser
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This parser scans raylib.h to get information about structs, enums and functions.
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All data is separated into parts, usually as strings. The following types are used for data:
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- struct FunctionInfo
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- struct StructInfo
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- struct EnumInfo
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CONSTRAINTS:
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This parser is specifically designed to work with raylib.h, so, it has some constraints:
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- Functions are expected as a single line with the following structure:
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<retType> <name>(<paramType[0]> <paramName[0]>, <paramType[1]> <paramName[1]>); <desc>
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Be careful with functions broken into several lines, it breaks the process!
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- Structures are expected as several lines with the following form:
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<desc>
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typedef struct <name> {
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<fieldType[0]> <fieldName[0]>; <fieldDesc[0]>
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<fieldType[1]> <fieldName[1]>; <fieldDesc[1]>
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<fieldType[2]> <fieldName[2]>; <fieldDesc[2]>
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} <name>;
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- Enums are expected as several lines with the following form:
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<desc>
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typedef enum {
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<valueName[0]> = <valueInt[0]>, <valueDesc[0]>
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<valueName[1]>,
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<valueName[2]>, <valueDesc[2]>
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<valueName[3]> <valueDesc[3]>
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} <name>;
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NOTE: Multiple options are supported:
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- If value is not provided, (<valueInt[i -1]> + 1) is assigned
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- Value description can be provided or not
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This parser could work with other C header files if mentioned constraints are followed.
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This parser does not require <string.h> library, all data is parsed directly from char buffers.
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LICENSE: zlib/libpng
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raylib-parser is licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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BSD-like license that allows static linking with closed source software:
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Copyright (c) 2021 Ramon Santamaria (@raysan5)
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**********************************************************************************************/
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#include <stdlib.h> // Required for: malloc(), calloc(), realloc(), free(), atoi(), strtol()
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#include <stdio.h> // Required for: printf(), fopen(), fseek(), ftell(), fread(), fclose()
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#include <stdbool.h> // Required for: bool
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#define MAX_FUNCS_TO_PARSE 512 // Maximum number of functions to parse
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#define MAX_STRUCTS_TO_PARSE 64 // Maximum number of structures to parse
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#define MAX_ENUMS_TO_PARSE 64 // Maximum number of enums to parse
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#define MAX_LINE_LENGTH 512 // Maximum length of one line (including comments)
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#define MAX_STRUCT_LINE_LENGTH 2048 // Maximum length of one struct (multiple lines)
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//----------------------------------------------------------------------------------
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// Types and Structures Definition
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//----------------------------------------------------------------------------------
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// Function info data
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typedef struct FunctionInfo {
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char name[64]; // Function name
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char retType[32]; // Return value type
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int paramCount; // Number of function parameters
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char paramType[12][32]; // Parameters type (max: 12 parameters)
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char paramName[12][32]; // Parameters name (max: 12 parameters)
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char desc[128]; // Function description (comment at the end)
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} FunctionInfo;
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// Struct info data
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typedef struct StructInfo {
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char name[64]; // Struct name
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char desc[64]; // Struct type description
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int fieldCount; // Number of fields in the struct
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char fieldType[16][32]; // Field type (max: 16 fields)
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char fieldName[16][32]; // Field name (max: 16 fields)
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char fieldDesc[16][128]; // Field description (max: 16 fields)
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} StructInfo;
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// Enum info data
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typedef struct EnumInfo {
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char name[64]; // Enum name
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char desc[64]; // Enum description
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int valueCount; // Number of values in enumerator
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char valueName[128][64]; // Value name definition (max: 128 values)
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int valueInt[128]; // Value integer (max: 128 values)
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} EnumInfo;
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//----------------------------------------------------------------------------------
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// Module Functions Declaration
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//----------------------------------------------------------------------------------
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char *LoadFileText(const char *fileName, int *length);
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char **GetTextLines(const char *buffer, int length, int *linesCount);
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void GetDataTypeAndName(const char *typeName, int typeNameLen, char *type, char *name);
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bool IsTextEqual(const char *text1, const char *text2, unsigned int count);
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void MemoryCopy(void *dest, const void *src, unsigned int count);
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// Main entry point
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int main()
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{
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int length = 0;
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char *buffer = LoadFileText("../src/raylib.h", &length);
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// Preprocess buffer to get separate lines
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// NOTE: GetTextLines() also removes leading spaces/tabs
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int linesCount = 0;
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char **lines = GetTextLines(buffer, length, &linesCount);
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// Print buffer lines
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//for (int i = 0; i < linesCount; i++) printf("_%s_\n", lines[i]);
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// Function lines pointers, selected from buffer "lines"
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int funcCount = 0;
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char **funcLines = (char **)malloc(MAX_FUNCS_TO_PARSE*sizeof(char *));
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// Structs data (multiple lines), selected from "buffer"
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int structCount = 0;
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char **structLines = (char **)malloc(MAX_STRUCTS_TO_PARSE*sizeof(char *));
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for (int i = 0; i < MAX_STRUCTS_TO_PARSE; i++) structLines[i] = (char *)calloc(MAX_STRUCT_LINE_LENGTH, sizeof(char));
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// Enums lines pointers, selected from buffer "lines"
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int enumCount = 0;
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int *enumLines = (int *)malloc(MAX_ENUMS_TO_PARSE*sizeof(int));
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// Prepare required lines for parsing
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//--------------------------------------------------------------------------------------------------
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// Read function lines
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for (int i = 0; i < linesCount; i++)
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{
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// Read function line (starting with "RLAPI")
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if (IsTextEqual(lines[i], "RLAPI", 5))
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{
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// Keep a pointer to the function line
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funcLines[funcCount] = lines[i];
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funcCount++;
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}
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}
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// Print function lines
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//for (int i = 0; i < funcCount; i++) printf("%s\n", funcLines[i]);
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// Read structs data (multiple lines, read directly from buffer)
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// TODO: Parse structs data from "lines" instead of "buffer" -> Easier to get struct definition
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for (int i = 0; i < length; i++)
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{
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// Read struct data (starting with "typedef struct", ending with '} ... ;')
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// NOTE: We read it directly from buffer
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if (IsTextEqual(buffer + i, "typedef struct", 14))
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{
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int j = 0;
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bool validStruct = false;
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// WARNING: Typedefs between types: typedef Vector4 Quaternion;
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for (int c = 0; c < 128; c++)
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{
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if (buffer[i + c] == '{')
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{
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validStruct = true;
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break;
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}
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else if (buffer[i + j] == ';')
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{
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// Not valid struct:
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// i.e typedef struct rAudioBuffer rAudioBuffer; -> Typedef and forward declaration
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i += c;
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break;
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}
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}
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if (validStruct)
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{
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while (buffer[i + j] != '}')
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{
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structLines[structCount][j] = buffer[i + j];
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j++;
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}
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while (buffer[i + j] != '}')
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{
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structLines[structCount][j] = buffer[i + j];
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j++;
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}
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while (buffer[i + j] != '\n')
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{
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structLines[structCount][j] = buffer[i + j];
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j++;
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}
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i += j;
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structCount++;
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}
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}
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}
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// Read enum lines
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for (int i = 0; i < linesCount; i++)
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{
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// Read function line (starting with "RLAPI")
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if (IsTextEqual(lines[i], "typedef enum {", 14))
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{
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// Keep the line position in the array of lines,
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// so, we can scan that position and following lines
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enumLines[enumCount] = i;
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enumCount++;
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}
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}
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// At this point we have all raylib structs, enums, functions lines data to start parsing
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free(buffer); // Unload text buffer
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// Parsing raylib data
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//--------------------------------------------------------------------------------------------------
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// Structs info data
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StructInfo *structs = (StructInfo *)calloc(MAX_STRUCTS_TO_PARSE, sizeof(StructInfo));
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for (int i = 0; i < structCount; i++)
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{
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int structLineOffset = 0;
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// Get struct name: typedef struct name {
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for (int c = 15; c < 64 + 15; c++)
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{
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if (structLines[i][c] == '{')
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{
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structLineOffset = c + 2;
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MemoryCopy(structs[i].name, &structLines[i][15], c - 15 - 1);
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break;
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}
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}
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// Get struct fields and count them -> fields finish with ;
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int j = 0;
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while (structLines[i][structLineOffset + j] != '}')
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{
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// WARNING: Some structs have empty spaces and comments -> OK, processed
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int fieldStart = 0;
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if ((structLines[i][structLineOffset + j] != ' ') && (structLines[i][structLineOffset + j] != '\n')) fieldStart = structLineOffset + j;
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if (fieldStart != 0)
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{
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// Scan one field line
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int c = 0;
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int fieldEndPos = 0;
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char fieldLine[256] = { 0 };
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while (structLines[i][structLineOffset + j] != '\n')
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{
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if (structLines[i][structLineOffset + j] == ';') fieldEndPos = c;
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fieldLine[c] = structLines[i][structLineOffset + j];
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c++; j++;
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}
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if (fieldLine[0] != '/') // Field line is not a comment
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{
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//printf("Struct field: %s_\n", fieldLine); // OK!
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// Get struct field type and name
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GetDataTypeAndName(fieldLine, fieldEndPos, structs[i].fieldType[structs[i].fieldCount], structs[i].fieldName[structs[i].fieldCount]);
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// Get the field description
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// We start skipping spaces in front of description comment
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int descStart = fieldEndPos;
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while ((fieldLine[descStart] != '/') && (fieldLine[descStart] != '\0')) descStart++;
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int k = 0;
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while ((fieldLine[descStart + k] != '\0') && (fieldLine[descStart + k] != '\n'))
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{
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structs[i].fieldDesc[structs[i].fieldCount][k] = fieldLine[descStart + k];
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k++;
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}
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structs[i].fieldCount++;
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}
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}
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j++;
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}
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}
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for (int i = 0; i < MAX_STRUCTS_TO_PARSE; i++) free(structLines[i]);
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free(structLines);
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// Enum info data
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EnumInfo *enums = (EnumInfo *)calloc(MAX_ENUMS_TO_PARSE, sizeof(EnumInfo));
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for (int i = 0; i < enumCount; i++)
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{
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// TODO: Get enum description from lines[enumLines[i] - 1]
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for (int j = 1; j < 256; j++) // Maximum number of lines following enum first line
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{
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char *linePtr = lines[enumLines[i] + j];
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if ((linePtr[0] >= 'A') && (linePtr[0] <= 'Z'))
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{
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// Parse enum value line, possible options:
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//ENUM_VALUE_NAME,
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//ENUM_VALUE_NAME
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//ENUM_VALUE_NAME = 99
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//ENUM_VALUE_NAME = 99,
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//ENUM_VALUE_NAME = 0x00000040, // Value description
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// We start reading the value name
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int c = 0;
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while ((linePtr[c] != ',') &&
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(linePtr[c] != ' ') &&
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(linePtr[c] != '=') &&
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(linePtr[c] != '\0')) { enums[i].valueName[enums[i].valueCount][c] = linePtr[c]; c++; }
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// After the name we can have:
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// '=' -> value is provided
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// ',' -> value is equal to previous + 1, there could be a description if not '\0'
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// ' ' -> value is equal to previous + 1, there could be a description if not '\0'
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// '\0' -> value is equal to previous + 1
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// Let's start checking if the line is not finished
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if ((linePtr[c] != ',') && (linePtr[c] != '\0'))
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{
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// Two options:
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// '=' -> value is provided
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// ' ' -> value is equal to previous + 1, there could be a description if not '\0'
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bool foundValue = false;
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while (linePtr[c] != '\0')
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{
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if (linePtr[c] == '=') { foundValue = true; break; }
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c++;
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}
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if (foundValue)
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{
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if (linePtr[c + 1] == ' ') c += 2;
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else c++;
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// Parse integer value
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int n = 0;
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char integer[16] = { 0 };
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while ((linePtr[c] != ',') && (linePtr[c] != ' ') && (linePtr[c] != '\0'))
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{
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integer[n] = linePtr[c];
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c++; n++;
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}
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if (integer[1] == 'x') enums[i].valueInt[enums[i].valueCount] = (int)strtol(integer, NULL, 16);
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else enums[i].valueInt[enums[i].valueCount] = atoi(integer);
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}
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else enums[i].valueInt[enums[i].valueCount] = (enums[i].valueInt[enums[i].valueCount - 1] + 1);
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// TODO: Parse value description if any
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}
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else enums[i].valueInt[enums[i].valueCount] = (enums[i].valueInt[enums[i].valueCount - 1] + 1);
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enums[i].valueCount++;
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}
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else if (linePtr[0] == '}')
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{
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// Get enum name from typedef
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int c = 0;
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while (linePtr[2 + c] != ';') { enums[i].name[c] = linePtr[2 + c]; c++; }
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break; // Enum ended, break for() loop
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}
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}
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}
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// Functions info data
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FunctionInfo *funcs = (FunctionInfo *)calloc(MAX_FUNCS_TO_PARSE, sizeof(FunctionInfo));
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for (int i = 0; i < funcCount; i++)
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{
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int funcParamsStart = 0;
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int funcEnd = 0;
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// Get return type and function name from func line
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for (int c = 0; (c < MAX_LINE_LENGTH) && (funcLines[i][c] != '\n'); c++)
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{
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if (funcLines[i][c] == '(') // Starts function parameters
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{
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funcParamsStart = c + 1;
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// At this point we have function return type and function name
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char funcRetTypeName[128] = { 0 };
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int funcRetTypeNameLen = c - 6; // Substract "RLAPI "
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MemoryCopy(funcRetTypeName, &funcLines[i][6], funcRetTypeNameLen);
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GetDataTypeAndName(funcRetTypeName, funcRetTypeNameLen, funcs[i].retType, funcs[i].name);
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break;
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}
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}
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// Get parameters from func line
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for (int c = funcParamsStart; c < MAX_LINE_LENGTH; c++)
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{
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if (funcLines[i][c] == ',') // Starts function parameters
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{
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// Get parameter type + name, extract info
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char funcParamTypeName[128] = { 0 };
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int funcParamTypeNameLen = c - funcParamsStart;
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MemoryCopy(funcParamTypeName, &funcLines[i][funcParamsStart], funcParamTypeNameLen);
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GetDataTypeAndName(funcParamTypeName, funcParamTypeNameLen, funcs[i].paramType[funcs[i].paramCount], funcs[i].paramName[funcs[i].paramCount]);
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funcParamsStart = c + 1;
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if (funcLines[i][c + 1] == ' ') funcParamsStart += 1;
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funcs[i].paramCount++; // Move to next parameter
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}
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else if (funcLines[i][c] == ')')
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{
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funcEnd = c + 2;
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// Check if previous word is void
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if ((funcLines[i][c - 4] == 'v') && (funcLines[i][c - 3] == 'o') && (funcLines[i][c - 2] == 'i') && (funcLines[i][c - 1] == 'd')) break;
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// Get parameter type + name, extract info
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char funcParamTypeName[128] = { 0 };
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int funcParamTypeNameLen = c - funcParamsStart;
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MemoryCopy(funcParamTypeName, &funcLines[i][funcParamsStart], funcParamTypeNameLen);
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GetDataTypeAndName(funcParamTypeName, funcParamTypeNameLen, funcs[i].paramType[funcs[i].paramCount], funcs[i].paramName[funcs[i].paramCount]);
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funcs[i].paramCount++; // Move to next parameter
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break;
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}
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}
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// Get function description
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for (int c = funcEnd; c < MAX_LINE_LENGTH; c++)
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{
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if (funcLines[i][c] == '/')
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{
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MemoryCopy(funcs[i].desc, &funcLines[i][c], 127); // WARNING: Size could be too long for funcLines[i][c]?
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break;
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}
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}
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}
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for (int i = 0; i < linesCount; i++) free(lines[i]);
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free(lines);
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free(funcLines);
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// At this point, all raylib data has been parsed!
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//-----------------------------------------------------------------------------------------
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// structs[] -> We have all the structs decomposed into pieces for further analysis
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// enums[] -> We have all the enums decomposed into pieces for further analysis
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// funcs[] -> We have all the functions decomposed into pieces for further analysis
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// Print structs info
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printf("\nStructures found: %i\n\n", structCount);
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for (int i = 0; i < structCount; i++)
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{
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printf("Struct %02i: %s (%i fields)\n", i + 1, structs[i].name, structs[i].fieldCount);
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//printf("Description: %s\n", structs[i].desc);
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for (int f = 0; f < structs[i].fieldCount; f++) printf(" Fields %i: %s %s %s\n", f + 1, structs[i].fieldType[f], structs[i].fieldName[f], structs[i].fieldDesc[f]);
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}
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// Print enums info
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printf("\nEnums found: %i\n\n", enumCount);
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for (int i = 0; i < enumCount; i++)
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{
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printf("Enum %02i: %s (%i values)\n", i + 1, enums[i].name, enums[i].valueCount);
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//printf("Description: %s\n", enums[i].desc);
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for (int e = 0; e < enums[i].valueCount; e++) printf(" Value %s: %i\n", enums[i].valueName[e], enums[i].valueInt[e]);
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}
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// Print function info
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printf("\nFunctions found: %i\n\n", funcCount);
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for (int i = 0; i < funcCount; i++)
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{
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printf("Function %03i: %s() (%i input parameters)\n", i + 1, funcs[i].name, funcs[i].paramCount);
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printf(" Description: %s\n", funcs[i].desc);
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printf(" Return type: %s\n", funcs[i].retType);
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for (int p = 0; p < funcs[i].paramCount; p++) printf(" Param %i: %s (type: %s)\n", p + 1, funcs[i].paramName[p], funcs[i].paramType[p]);
|
|
if (funcs[i].paramCount == 0) printf(" No input parameters\n");
|
|
}
|
|
|
|
free(funcs);
|
|
free(structs);
|
|
free(enums);
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Module Functions Definition
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Load text data from file, returns a '\0' terminated string
|
|
// NOTE: text chars array should be freed manually
|
|
char *LoadFileText(const char *fileName, int *length)
|
|
{
|
|
char *text = NULL;
|
|
|
|
if (fileName != NULL)
|
|
{
|
|
FILE *file = fopen(fileName, "rt");
|
|
|
|
if (file != NULL)
|
|
{
|
|
// WARNING: When reading a file as 'text' file,
|
|
// text mode causes carriage return-linefeed translation...
|
|
// ...but using fseek() should return correct byte-offset
|
|
fseek(file, 0, SEEK_END);
|
|
int size = ftell(file);
|
|
fseek(file, 0, SEEK_SET);
|
|
|
|
if (size > 0)
|
|
{
|
|
*length = size;
|
|
|
|
text = (char *)calloc((size + 1), sizeof(char));
|
|
unsigned int count = (unsigned int)fread(text, sizeof(char), size, file);
|
|
|
|
// WARNING: \r\n is converted to \n on reading, so,
|
|
// read bytes count gets reduced by the number of lines
|
|
if (count < (unsigned int)size) text = realloc(text, count + 1);
|
|
|
|
// Zero-terminate the string
|
|
text[count] = '\0';
|
|
}
|
|
|
|
fclose(file);
|
|
}
|
|
}
|
|
|
|
return text;
|
|
}
|
|
|
|
// Get all lines from a text buffer (expecting lines ending with '\n')
|
|
char **GetTextLines(const char *buffer, int length, int *linesCount)
|
|
{
|
|
//#define MAX_LINE_LENGTH 512
|
|
|
|
// Get the number of lines in the text
|
|
int count = 0;
|
|
for (int i = 0; i < length; i++) if (buffer[i] == '\n') count++;
|
|
|
|
//printf("Number of text lines in buffer: %i\n", count);
|
|
|
|
// Allocate as many pointers as lines
|
|
char **lines = (char **)malloc(count*sizeof(char **));
|
|
|
|
char *bufferPtr = (char *)buffer;
|
|
|
|
for (int i = 0; (i < count) || (bufferPtr[0] != '\0'); i++)
|
|
{
|
|
lines[i] = (char *)calloc(MAX_LINE_LENGTH, sizeof(char));
|
|
|
|
// Remove line leading spaces
|
|
// Find last index of space/tab character
|
|
int index = 0;
|
|
while ((bufferPtr[index] == ' ') || (bufferPtr[index] == '\t')) index++;
|
|
|
|
int j = 0;
|
|
while (bufferPtr[index + j] != '\n')
|
|
{
|
|
lines[i][j] = bufferPtr[index + j];
|
|
j++;
|
|
}
|
|
|
|
bufferPtr += (index + j + 1);
|
|
}
|
|
|
|
*linesCount = count;
|
|
return lines;
|
|
}
|
|
|
|
// Get data type and name from a string containing both
|
|
// NOTE: Useful to parse function parameters and struct fields
|
|
void GetDataTypeAndName(const char *typeName, int typeNameLen, char *type, char *name)
|
|
{
|
|
for (int k = typeNameLen; k > 0; k--)
|
|
{
|
|
if (typeName[k] == ' ')
|
|
{
|
|
// Function name starts at this point (and ret type finishes at this point)
|
|
MemoryCopy(type, typeName, k);
|
|
MemoryCopy(name, typeName + k + 1, typeNameLen - k - 1);
|
|
break;
|
|
}
|
|
else if (typeName[k] == '*')
|
|
{
|
|
MemoryCopy(type, typeName, k + 1);
|
|
MemoryCopy(name, typeName + k + 1, typeNameLen - k - 1);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Custom memcpy() to avoid <string.h>
|
|
void MemoryCopy(void *dest, const void *src, unsigned int count)
|
|
{
|
|
char *srcPtr = (char *)src;
|
|
char *destPtr = (char *)dest;
|
|
|
|
for (unsigned int i = 0; i < count; i++) destPtr[i] = srcPtr[i];
|
|
}
|
|
|
|
// Compare two text strings, requires number of characters to compare
|
|
bool IsTextEqual(const char *text1, const char *text2, unsigned int count)
|
|
{
|
|
bool result = true;
|
|
|
|
for (unsigned int i = 0; i < count; i++)
|
|
{
|
|
if (text1[i] != text2[i])
|
|
{
|
|
result = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
// Replace text string
|
|
// REQUIRES: strlen(), strstr(), strncpy(), strcpy() -> TODO: Replace by custom implementations!
|
|
// WARNING: Returned buffer must be freed by the user (if return != NULL)
|
|
char *TextReplace(char *text, const char *replace, const char *by)
|
|
{
|
|
// Sanity checks and initialization
|
|
if (!text || !replace || !by) return NULL;
|
|
|
|
char *result;
|
|
|
|
char *insertPoint; // Next insert point
|
|
char *temp; // Temp pointer
|
|
int replaceLen; // Replace string length of (the string to remove)
|
|
int byLen; // Replacement length (the string to replace replace by)
|
|
int lastReplacePos; // Distance between replace and end of last replace
|
|
int count; // Number of replacements
|
|
|
|
replaceLen = strlen(replace);
|
|
if (replaceLen == 0) return NULL; // Empty replace causes infinite loop during count
|
|
|
|
byLen = strlen(by);
|
|
|
|
// Count the number of replacements needed
|
|
insertPoint = text;
|
|
for (count = 0; (temp = strstr(insertPoint, replace)); count++) insertPoint = temp + replaceLen;
|
|
|
|
// Allocate returning string and point temp to it
|
|
temp = result = (char *)malloc(strlen(text) + (byLen - replaceLen)*count + 1);
|
|
|
|
if (!result) return NULL; // Memory could not be allocated
|
|
|
|
// First time through the loop, all the variable are set correctly from here on,
|
|
// - 'temp' points to the end of the result string
|
|
// - 'insertPoint' points to the next occurrence of replace in text
|
|
// - 'text' points to the remainder of text after "end of replace"
|
|
while (count--)
|
|
{
|
|
insertPoint = strstr(text, replace);
|
|
lastReplacePos = (int)(insertPoint - text);
|
|
temp = strncpy(temp, text, lastReplacePos) + lastReplacePos;
|
|
temp = strcpy(temp, by) + byLen;
|
|
text += lastReplacePos + replaceLen; // Move to next "end of replace"
|
|
}
|
|
|
|
// Copy remaind text part after replacement to result (pointed by moving temp)
|
|
strcpy(temp, text);
|
|
|
|
return result;
|
|
}
|
|
*/ |