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POHow to read unicode (utf-8) / binary file line by line
 

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  1. POHow to read unicode (utf-8) / binary file line by line
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    <p><strong>Hi programmers,</strong></p> <p>I want read line by line a Unicode (UTF-8) text file created by Notepad, i don't want display the Unicode string in the screen, i want just read and compare the strings!.</p> <p>This code read ANSI file line by line, and compare the strings</p> <h2>What i want</h2> <p>Read test_ansi.txt line by line</p> <p>if the line = "b" print "YES!"</p> <p>else print "NO!"</p> <h2>read_ansi_line_by_line.c</h2> <pre><code>#include &lt;stdio.h&gt; int main() { char *inname = "test_ansi.txt"; FILE *infile; char line_buffer[BUFSIZ]; /* BUFSIZ is defined if you include stdio.h */ char line_number; infile = fopen(inname, "r"); if (!infile) { printf("\nfile '%s' not found\n", inname); return 0; } printf("\n%s\n\n", inname); line_number = 0; while (fgets(line_buffer, sizeof(line_buffer), infile)) { ++line_number; /* note that the newline is in the buffer */ if (strcmp("b\n", line_buffer) == 0 ){ printf("%d: YES!\n", line_number); }else{ printf("%d: NO!\n", line_number,line_buffer); } } printf("\n\nTotal: %d\n", line_number); return 0; } </code></pre> <h2>test_ansi.txt</h2> <pre><code>a b c </code></pre> <h2>Compiling</h2> <pre><code>gcc -o read_ansi_line_by_line read_ansi_line_by_line.c </code></pre> <h2>Output</h2> <pre><code>test_ansi.txt 1: NO! 2: YES! 3: NO! Total: 3 </code></pre> <p>Now i need read Unicode (UTF-8) file created by Notepad, after more than 6 months i don't found any good code/library in C can read file coded in UTF-8!, i don't know exactly why but i think the standard C don't support Unicode!</p> <p>Reading Unicode binary file its OK!, but the probleme is the binary file most be already created in binary mode!, that mean if we want read a Unicode (UTF-8) file created by Notepad we need to translate it from UTF-8 file to BINARY file!</p> <p>This code write Unicode string to a binary file, NOTE the C file is coded in UTF-8 and compiled by GCC</p> <h2>What i want</h2> <p>Write the Unicode char "ب" to test_bin.dat</p> <h2>create_bin.c</h2> <pre><code>#define UNICODE #ifdef UNICODE #define _UNICODE #else #define _MBCS #endif #include &lt;stdio.h&gt; #include &lt;wchar.h&gt; int main() { /*Data to be stored in file*/ wchar_t line_buffer[BUFSIZ]=L"ب"; /*Opening file for writing in binary mode*/ FILE *infile=fopen("test_bin.dat","wb"); /*Writing data to file*/ fwrite(line_buffer, 1, 13, infile); /*Closing File*/ fclose(infile); return 0; } </code></pre> <h2>Compiling</h2> <pre><code>gcc -o create_bin create_bin.c </code></pre> <h2>Output</h2> <pre><code>create test_bin.dat </code></pre> <p>Now i want read the binary file line by line and compare!</p> <h2>What i want</h2> <p>Read test_bin.dat line by line if the line = "ب" print "YES!" else print "NO!"</p> <h2>read_bin_line_by_line.c</h2> <pre><code>#define UNICODE #ifdef UNICODE #define _UNICODE #else #define _MBCS #endif #include &lt;stdio.h&gt; #include &lt;wchar.h&gt; int main() { wchar_t *inname = L"test_bin.dat"; FILE *infile; wchar_t line_buffer[BUFSIZ]; /* BUFSIZ is defined if you include stdio.h */ infile = _wfopen(inname,L"rb"); if (!infile) { wprintf(L"\nfile '%s' not found\n", inname); return 0; } wprintf(L"\n%s\n\n", inname); /*Reading data from file into temporary buffer*/ while (fread(line_buffer,1,13,infile)) { /* note that the newline is in the buffer */ if ( wcscmp ( L"ب" , line_buffer ) == 0 ){ wprintf(L"YES!\n"); }else{ wprintf(L"NO!\n", line_buffer); } } /*Closing File*/ fclose(infile); return 0; } </code></pre> <h2>Output</h2> <pre><code>test_bin.dat YES! </code></pre> <hr> <h2>THE PROBLEM</h2> <p>This method is VERY LONG! and NOT POWERFUL (i m beginner in software engineering)</p> <p>Please any one know how to read Unicode file ? (i know its not easy!) Please any one know how to convert Unicode file to Binary file ? (simple method) Please any one know how to read Unicode file in binary mode ? (i m not sure)</p> <p>Thank You. </p>
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