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https://github.com/Relintai/sdl2_frt.git
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0e45984fa0
The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
85 lines
3.1 KiB
C
85 lines
3.1 KiB
C
/* See COPYING.txt for the full license governing this code. */
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/**
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* \file rwhelper.c
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*
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* Header file with some helper functions for working with SDL_RWops.
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*/
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#include <SDL_rwops.h>
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#ifndef _SDL_visualtest_rwhelper_h
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#define _SDL_visualtest_rwhelper_h
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/** Length of the buffer in SDLVisualTest_RWHelperBuffer */
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#define RWOPS_BUFFER_LEN 256
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Struct that is used as a buffer by the RW helper functions. Should be initialized by calling
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* SDLVisualTest_RWHelperResetBuffer() before being used.
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*/
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typedef struct SDLVisualTest_RWHelperBuffer
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{
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/*! Character buffer that data is read into */
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char buffer[RWOPS_BUFFER_LEN];
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/*! buffer[buffer_pos] is the next character to be read from the buffer */
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int buffer_pos;
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/*! Number of character read into the buffer */
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int buffer_width;
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} SDLVisualTest_RWHelperBuffer;
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/**
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* Resets the buffer pointed to by \c buffer used by some of the helper functions.
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* This function should be called when you're using one of the helper functions
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* with a new SDL_RWops object.
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*/
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void SDLVisualTest_RWHelperResetBuffer(SDLVisualTest_RWHelperBuffer* buffer);
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/**
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* Reads a single character using the SDL_RWops object pointed to by \c rw.
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* This function reads data in blocks and stores them in the buffer pointed to by
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* \c buffer, so other SDL_RWops functions should not be used in conjunction
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* with this function.
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*
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* \return The character that was read.
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*/
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char SDLVisualTest_RWHelperReadChar(SDL_RWops* rw,
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SDLVisualTest_RWHelperBuffer* buffer);
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/**
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* Reads characters using the SDL_RWops object pointed to by \c rw into the
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* character array pointed to by \c str (of size \c size) until either the
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* array is full or a new line is encountered. If \c comment_char is encountered,
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* all characters from that position till the end of the line are ignored. The new line
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* is not included as part of the buffer. Lines with only whitespace and comments
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* are ignored. This function reads data in blocks and stores them in the buffer
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* pointed to by \c buffer, so other SDL_RWops functions should not be used in
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* conjunction with this function.
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*
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* \return pointer to the string on success, NULL on failure or EOF.
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*/
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char* SDLVisualTest_RWHelperReadLine(SDL_RWops* rw, char* str, int size,
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SDLVisualTest_RWHelperBuffer* buffer,
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char comment_char);
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/**
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* Counts the number of lines that are not all whitespace and comments using the
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* SDL_RWops object pointed to by \c rw. \c comment_char indicates the character
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* used for comments. Uses the buffer pointed to by \c buffer to read data in blocks.
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*
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* \return Number of lines on success, -1 on failure.
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*/
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int SDLVisualTest_RWHelperCountNonEmptyLines(SDL_RWops* rw,
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SDLVisualTest_RWHelperBuffer* buffer,
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char comment_char);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SDL_visualtest_rwhelper_h */ |