converte.c

   1 /* Daniel dos Santos Marques 071xxxx */
   2 /* Pedro Grojsgold 0712051 */
   3
   4
   5 #include <stdarg.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10
  11 enum Code {utf8, utf32, latin1};
  12
  13
  14 int decodeLatin1(int);
  15 int decodeUtf8(int);
  16 int decodeUtf32(int);
  17 int encodeLatin1(int);
  18 int encodeUtf8(int);
  19 int encodeUtf32(int);
  20
  21
  22 void error (const char *fmt, ...) {
  23         va_list argp;
  24         va_start(argp, fmt);
  25         vfprintf(stderr, fmt, argp);
  26         va_end(argp);
  27         exit(1);
  28 }
  29
  30
  31 enum Code getcode (const char *codename) {
  32         if (strcmp(codename, "latin1") == 0) return latin1;
  33         if (strcmp(codename, "utf8") == 0) return utf8;
  34         if (strcmp(codename, "utf32") == 0) return utf32;
  35         error("có́digo ’%s’ invá́lido: os có́digos aceitos são "
  36                    "’latin1’, ’utf8’ e ’utf32’\n", codename);
  37         return 0;
  38 }
  39
  40
  41 int main (int argc, char *argv[]) {
  42         FILE *in, *out;
  43         enum Code codein, codeout;
  44         int charCode, c[4];
  45         if (argc != 5)
  46                 error("uso correto: %s code-in code-out file-in file-out\n", argv[0]);
  47         codein = getcode(argv[1]);
  48         codeout = getcode(argv[2]);
  49         in = fopen(argv[3], "rb");
  50         if (in == NULL)
  51                 error("não foi possível abrir arquivo '%s'\n", argv[3]);
  52         out = fopen(argv[4], "wb");
  53         if (out == NULL)
  54                 error("não foi possível abrir arquivo '%s'\n", argv[4]);
  55
  56         while(!feof(in)) {
  57                 switch(codein) {
  58                         case latin1:
  59                                 c[0] = fgetc(in);
  60                                 charCode = decodeLatin1(c[0]);
  61                                 printf("c[0]:%c   c[0]:%d   cC:%d\n", c[0], c[0], charCode);
  62                                 break;
  63                         case utf8:
  64                                 charCode = decodeUtf8(0);
  65                                 break;
  66                         case utf32:
  67                                 charCode = decodeUtf32(0);
  68                                 break;
  69                         default:
  70                                 break;
  71                 }
  72                 if(-1 == charCode) {
  73                         continue;
  74                 }
  75                 switch(codeout) {
  76                         case latin1:
  77                                 fputc(encodeLatin1(charCode), out);
  78                                 break;
  79                         case utf8:
  80                                 break;
  81                         case utf32:
  82                                 break;
  83                         default:
  84                                 break;
  85                 }
  86         }
  87
  88         fclose(in);
  89         fclose(out);
  90         return 1;
  91 }
  92
  93
  94 int decodeLatin1(int code) {
  95         if(code >= 0 && code <= 127) {
  96                 return code;
  97         } else {
  98                 return -1;
  99         }
 100 }
 101
 102
 103 int decodeUtf8(int code) {
 104         if(code >= 0 && code <= 127) {
 105                 return code;
 106         } else {
 107                 return -1;
 108         }
 109 }
 110
 111
 112 int decodeUtf32(int code) {
 113         if(code >= 0 && code <= 127) {
 114                 return code;
 115         } else {
 116                 return -1;
 117         }
 118 }
 119
 120
 121 int encodeLatin1(int code) {
 122         if(code >= 0 && code <= 255/*TODO: Verificar se pode estar entre 127 e 255*/) {
 123                 return code;
 124         } else {
 125                 return -1;
 126         }
 127 }
 128
 129
 130 int encodeUtf8(int code) {
 131 }
 132
 133
 134 int encodeUtf32(int code) {
 135 }