52 lines
1.4 KiB
TeX
52 lines
1.4 KiB
TeX
\subsubsection*{Purpose}
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Reads a file and puts it's content in a buffer.
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\subsubsection*{Prototype}
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\code{euint32 file\_read (File *file, euint32 size, euint8 *buf);}
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\subsubsection*{Arguments}
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Objects passed to \code{file\_read}:
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\begin{itemize}
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\item{\code{file}: pointer to a File object}
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\item{\code{size}: amount of bytes you want to read / put in buf}
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\item{\code{buf}: pointer to the buffer you want to store the data}
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\end{itemize}
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\subsubsection*{Return value}
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Returns the amount of bytes read.
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\subsubsection*{Example}
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\lstset{numbers=left, stepnumber=1, numberstyle=\small, numbersep=5pt, tabsize=4}
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\begin{lstlisting}
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#include "efs.h"
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void main(void)
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{
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EmbeddedFileSystem efsl;
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euint8 buffer[512];
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euint16 e, f;
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File file;
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/* Initialize efsl */
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DBG((TXT("Will init efsl now.\n")));
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if(efs_init(&efsl,"/dev/sda")!=0){
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DBG((TXT("Could not initialize filesystem (err \%d).\n"),ret));
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exit(-1);
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}
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DBG((TXT("Filesystem correctly initialized.\n")));
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/* Open file for reading */
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if(file_fopen(&file, &efsl.myFs, "read.txt", 'r')!=0){
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DBG((TXT("Could not open file for reading.\n")));
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exit(-1);
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}
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DBG((TXT("File opened for reading.\n")));
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/* Read file and print content */
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while((e=file_read(&file,512,buffer))){
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for(f=0;f<e;f++)
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DBG((TXT("\%c"),buffer[f]));
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}
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/* Close file & filesystem */
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fclose(&file);
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fs_umount(&efs.myFs);
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}
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\end{lstlisting}
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