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Save file as UTF-8

Posted on 2010-11-17
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Last Modified: 2012-08-13
Hi..

I have been trying to save a file as UTF-8 in C programming language but.. no chance. can not get it.

Can you please tell me how to do it? It is the only think that is missing to finish.

Thanks!
#include <stdio.h>
#include <string.h>

#define MAX_LEN_SINGLE_LINE     120   // ?

int main(int argc, char **argv[] )
{
     /*setlocale("LC_ALL", "pt_PT.utf8");*/
    
    if (argc < 3)
    {
     printf("\n REPLACER_vM :: Deve especificar [ficheiro_alvo.ext] [ficheiro_destino.ext] \n");   
          
     return 0;
             
    }
    else
    {
        printf("[ficheiro_alvo] %s \n", argv[1]);
        printf("[ficheiro_destino] %s \n", argv[2]);
        
    }   
    
    /* const char fileOrig[32] = "ficheiro1.csv"; */
    /* const char fileRepl[32] = "ficheiro2.idl"; */

    char fileOrig[99];
    strncpy( fileOrig, argv[1], 99 );
    
    char fileRepl[99];
    strncpy( fileRepl, argv[2], 99 );
    
    const char text2find[80] = ";";
    const char text2repl[80] = "|";

    char buffer[MAX_LEN_SINGLE_LINE+2];
    char *buff_ptr, *find_ptr;
    
    FILE *fp1, *fp2;
    
    size_t find_len = strlen(text2find);

    fp1 = fopen(fileOrig,"r");
    fp2 = fopen(fileRepl,"w");

    while(fgets(buffer,MAX_LEN_SINGLE_LINE+2,fp1))
    {
        buff_ptr = buffer;
        while ((find_ptr = strstr(buff_ptr,text2find)))
        {
            while(buff_ptr < find_ptr)
                fputc((int)*buff_ptr++,fp2);

            fputs(text2repl,fp2);

            buff_ptr += find_len;
        }
        fputs(buff_ptr,fp2);
    }

    fclose(fp2);
    fclose(fp1);

    return 0;
}

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Question by:vmorais_
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HappyCactus earned 500 total points
Comment Utility
You cannot this way, because C (and C++) only know about char format, not about charsets.
C in particular, does dial only with one-byte chars, and treat it as ASCII charsets.
You must use an external library such as libiconv[1].
Use iconv_open() to open the file, iconv() to make the conversion (if needed), write the new file and close it.
Pay attention that every time you want to refer to a character from code, you must use it with the right value within the charset selected.

[1] http://www.gnu.org/software/libiconv/

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Author Comment

by:vmorais_
Comment Utility
Can't find how to install that library on Bloodshed DevC++.

I'm using Win32.
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Expert Comment

by:HappyCactus
Comment Utility
Have you tried this one? [1]


[1] http://sourceforge.net/projects/devpaks/files/
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Author Comment

by:vmorais_
Comment Utility
Have just successfully installed using the given link.

I am trying to use iconv_open() and incov() in my code, but still can't get it.
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by:HappyCactus
Comment Utility
what is your problem? Can you post some code and some testing output?
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Author Comment

by:vmorais_
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for example, what parameters receive these functions?

iconv_open("filename.ext"); | in this case iconv_open(argv[2])

iconv("ANSI", "UTF-8");
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Expert Comment

by:HappyCactus
Comment Utility
See this:

http://www.manpagez.com/man/3/iconv/
http://www.manpagez.com/man/3/iconv_open/

In brief, you create a translation table with iconv_open("ANSI","UTF-8"), then read the file in a buffer, and pass that buffer to iconv, then write the output buffer into the new file.

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by:evilrix
Comment Utility
This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
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