Save file as UTF-8

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

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.

#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;
        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");

        buff_ptr = buffer;
        while ((find_ptr = strstr(buff_ptr,text2find)))
            while(buff_ptr < find_ptr)


            buff_ptr += find_len;


    return 0;

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Question by:vmorais_
  • 4
  • 3
LVL 12

Accepted Solution

HappyCactus earned 500 total points
ID: 34162357
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.



Author Comment

ID: 34181322
Can't find how to install that library on Bloodshed DevC++.

I'm using Win32.
LVL 12

Expert Comment

ID: 34182329
Have you tried this one? [1]


Author Comment

ID: 34319284
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.
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

LVL 12

Expert Comment

ID: 34319549
what is your problem? Can you post some code and some testing output?

Author Comment

ID: 34319892
for example, what parameters receive these functions?

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

iconv("ANSI", "UTF-8");
LVL 12

Expert Comment

ID: 34319943
See this:

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.

LVL 40

Expert Comment

ID: 34824220
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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