mirror of https://github.com/encounter/SDL.git
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/* See LICENSE.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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* Source file with some helper functions for working with SDL_RWops.
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*/
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#include <SDL_test.h>
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#include "SDL_visualtest_sut_configparser.h"
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#include "SDL_visualtest_rwhelper.h"
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void
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SDLVisualTest_RWHelperResetBuffer(SDLVisualTest_RWHelperBuffer* buffer)
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{
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if(!buffer)
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{
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SDLTest_LogError("buffer argument cannot be NULL");
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return;
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}
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buffer->buffer_pos = 0;
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buffer->buffer_width = 0;
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}
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char
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SDLVisualTest_RWHelperReadChar(SDL_RWops* rw, SDLVisualTest_RWHelperBuffer* buffer)
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{
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if(!rw || !buffer)
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return 0;
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/* if the buffer has been consumed, we fill it up again */
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if(buffer->buffer_pos == buffer->buffer_width)
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{
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buffer->buffer_width = SDL_RWread(rw, buffer->buffer, 1, RWOPS_BUFFER_LEN);
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buffer->buffer_pos = 0;
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if(buffer->buffer_width == 0)
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return 0;
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}
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buffer->buffer_pos++;
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return buffer->buffer[buffer->buffer_pos - 1];
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}
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/* does not include new lines in the buffer and adds a trailing null character */
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char*
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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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char ch;
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int current_pos, done;
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if(!rw)
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{
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SDLTest_LogError("rw argument cannot be NULL");
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return NULL;
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}
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if(!str)
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{
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SDLTest_LogError("str argument cannot be NULL");
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return NULL;
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}
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if(!buffer)
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{
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SDLTest_LogError("buffer argument cannot be NULL");
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return NULL;
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}
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if(size <= 0)
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{
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SDLTest_LogError("size argument should be positive");
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return NULL;
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}
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done = 0;
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while(!done)
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{
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/* ignore leading whitespace */
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for(ch = SDLVisualTest_RWHelperReadChar(rw, buffer); ch && SDL_isspace(ch);
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ch = SDLVisualTest_RWHelperReadChar(rw, buffer));
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for(current_pos = 0;
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ch && ch != '\n' && ch != '\r' && ch != comment_char;
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current_pos++)
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{
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str[current_pos] = ch;
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if(current_pos >= size - 2)
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{
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current_pos++;
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break;
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}
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ch = SDLVisualTest_RWHelperReadChar(rw, buffer);
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}
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done = 1;
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if(ch == comment_char) /* discard all characters until the next line */
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{
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do
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{
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ch = SDLVisualTest_RWHelperReadChar(rw, buffer);
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}while(ch && ch != '\n' && ch != '\r');
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if(current_pos == 0)
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done = 0;
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}
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}
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if(current_pos == 0)
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return NULL;
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str[current_pos] = '\0';
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return str;
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}
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/* Lines with all whitespace are ignored */
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int
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SDLVisualTest_RWHelperCountNonEmptyLines(SDL_RWops* rw,
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SDLVisualTest_RWHelperBuffer* buffer,
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char comment_char)
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{
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int num_lines = 0;
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char str[MAX_SUTOPTION_LINE_LENGTH];
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if(!rw)
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{
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SDLTest_LogError("rw argument cannot be NULL");
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return -1;
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}
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if(!buffer)
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{
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SDLTest_LogError("buffer argument cannot be NULL");
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return -1;
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}
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while(SDLVisualTest_RWHelperReadLine(rw, str, MAX_SUTOPTION_LINE_LENGTH,
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buffer, comment_char))
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num_lines++;
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return num_lines;
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} |