Re: mime headers quoted-printable

[Walter Alejandro Iglesias]

Inspired in the new utf8 man page (thanks tedu@) I think I found a
solution to the charset issue.

New version:


/*
 * MIME encode mail header quoted-printable.
 *
 */

#include <stdio.h>

#define ASCII   0x7f
#define IN      1
#define OUT     0
#define MAX     1024

int
main()
{
        int c, i, n, nl, count, isutf8, eightbit, encode, body;
        unsigned char s[MAX];

        i = n = nl = count = 0;
        encode = eightbit = body = isutf8 = OUT;

        while ((c = getchar()) != EOF) {
                if (body == IN)
                        putchar(c);
                else if (c == '\n' || c == ' ') {
                        s[i] = '\0';
                        if (eightbit == IN) {
                                if (encode == IN)
                                        printf("=20?= ");
                                if (isutf8 == OUT)
                                        printf("=?ISO-8859-1?Q?");
                                else
                                        printf("=?UTF-8?Q?");

                                while (n < i) {
                                        if (s[n] > ASCII ||
                                                s[n] == '=' ||
                                                s[n] == '?' ||
                                                s[n] == '\t')
                                                printf("=%02X", s[n++]);
                                        else
                                                printf("%c", s[n++]);
                                }
                                n = 0;
                                encode = IN;

                                if (c == '\n') {
                                        printf("?=");
                                        putchar(c);
                                        encode = OUT;
                                }

                                eightbit = OUT;
                        } else {
                                if (encode == IN)
                                        printf("?= ");
                                printf("%s", s);
                                putchar(c);
                                encode = OUT;
                        }
                        i = 0;
                        if (c == '\n')
                                ++nl;
                        else
                                nl = 0;
                        if (nl > 1)
                                body = IN;
                } else {
                        if (c > ASCII) {
                                eightbit = IN;
                                ++count;
                                if (count == 1) {
                                        if (c != 0xc2 &&
                                                c != 0xc3 &&
                                                c != 0xe2)
                                                isutf8 = OUT;
                                        else
                                                isutf8 = IN;
                                }
                        } else
                                count = 0;
                        if (i >= MAX - 1) {
                                s[i] = '\0';
                                printf("%s", s);
                                i = 0;
                        }
                        s[i++] = c;
                }
        }

        return 0;
}