Function msEncodeHTMLEntities

mapstring.c:1157–1214

msEncodeHTMLEntities() ** ** Return a copy of string after replacing some problematic chars with their ** HTML entity equivalents. ** ** The replacements performed are: ** '&' -> "&amp;", '"' -> "&quot;", '<' -> "&lt;" and '>' -> "&gt;" **/

**  '&' -> "&amp;", '"' -> "&quot;", '<' -> "&lt;" and '>' -> "&gt;"
**/
char *msEncodeHTMLEntities(const char *string) 
{
    int buflen, i;
    char *newstring;
    const char *c;

    if(string == NULL)
        return NULL;

    /* Start with 100 extra chars for replacements...  */
    /* should be good enough for most cases */
    buflen = strlen(string) + 100;
    newstring = (char*)malloc(buflen+1);
    MS_CHECK_ALLOC(newstring, buflen+1, NULL);

    for(i=0, c=string; *c != '\0'; c++)
    {
        /* Need to realloc buffer? */
        if (i+6 > buflen)
        {
            /* If we had to realloc then this string must contain several */
            /* entities... so let's go with twice the previous buffer size */
            buflen *= 2;
            newstring = (char*)realloc(newstring, buflen+1);
            MS_CHECK_ALLOC(newstring, buflen+1, NULL);
        }

        switch(*c)
        {
          case '&':
            strcpy(newstring+i, "&amp;");
            i += 5;
            break;
          case '<':
            strcpy(newstring+i, "&lt;");
            i += 4;
            break;
          case '>':
            strcpy(newstring+i, "&gt;");
            i += 4;
            break;
          case '"':
            strcpy(newstring+i, "&quot;");
            i += 6;
            break;
          case '\'':
            strcpy(newstring+i, "&#39;"); /* changed from &apos; and i += 6 (bug 1040) */
            i += 5;
            break;
          default:
            newstring[i++] = *c;
        }
    }

    newstring[i++] = '\0';

    return newstring;
}