103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <iconv.h>
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/*
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* This function converts the latin1 ISO_8859-1 encoding into utf-8.
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*/
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char *latin_to_utf8(char *input) {
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if (input && strlen(input) > 0) {
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iconv_t cd = iconv_open("UTF-8", "ISO_8859-1");
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char temp[strlen(input)];
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memcpy(temp, input, strlen(input) + 1);
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char *in_buffer = &temp[0];
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size_t in_left = sizeof(temp);
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/* The more tildes and ñs that the string has, the longer the size needs to be.
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* if the string is 100% of the aforementioned symbols, we will need a string of
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* double the size.
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*/
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char output[strlen(temp) * 2];
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char *out_buffer = &output[0];
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size_t out_left = sizeof(output);
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do {
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if (iconv(cd, &in_buffer, &in_left, &out_buffer, &out_left) == (size_t) -1) {
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#ifdef DEBUG
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printf("%s\n", input);
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perror("iconv");
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#endif
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iconv_close(cd);
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return NULL;
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}
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}
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while (in_left > 0 && out_left > 0);
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*out_buffer = 0;
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#if defined(DEBUG) && defined(DEBUG_ENCODING)
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printf("latin to UTF-8: input: %s\n", input);
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printf("latin to UTF-8: output: %s\n", output);
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#endif
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char *temp2 = (char *) malloc((strlen(output) + 1) * sizeof(char));
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memcpy(temp2, output, strlen(output) + 1);
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iconv_close(cd);
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return temp2;
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}
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return NULL;
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}
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/*
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* This function converts the utf-8 encoding into latin1 ISO_8859-1.
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*/
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char *utf8_to_latin(char *input) {
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if (input && strlen(input) > 0) {
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iconv_t cd = iconv_open("ISO_8859-1", "UTF-8");
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char temp[strlen(input)];
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memcpy(temp, input, strlen(input) + 1);
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char *in_buffer = &temp[0];
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size_t in_left = sizeof(temp);
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/* The more tildes and ñs that the string has, the longer the size needs to be.
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* if the string is 100% of the aforementioned symbols, we will need a string of
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* double the size.
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*/
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char output[strlen(temp) * 2];
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char *out_buffer = &output[0];
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size_t out_left = sizeof(output);
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do {
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if (iconv(cd, &in_buffer, &in_left, &out_buffer, &out_left) == (size_t) -1) {
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#ifdef DEBUG
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printf("%s\n", input);
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perror("iconv");
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#endif
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iconv_close(cd);
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return NULL;
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}
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}
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while (in_left > 0 && out_left > 0);
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*out_buffer = 0;
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#if defined(DEBUG) && defined(DEBUG_ENCODING)
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printf("UTF-8 to latin: input: %s\n", input);
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printf("UTF-8 to latin: output: %s\n", output);
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#endif
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char *temp2 = (char *) malloc((strlen(output) + 1) * sizeof(char));
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memcpy(temp2, output, strlen(output) + 1);
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iconv_close(cd);
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return temp2;
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}
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return NULL;
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}
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