}
}
-static int has_rfc822_specials(const char *s, int len)
+static int needs_rfc822_quoting(const char *s, int len)
{
int i;
for (i = 0; i < len; i++)
return !(isalnum(ch) || ch == '!' || ch == '*' || ch == '+' || ch == '-' || ch == '/');
}
-static void add_rfc2047(struct strbuf *sb, const char *line, int len,
- const char *encoding, enum rfc2047_type type)
+static int needs_rfc2047_encoding(const char *line, int len,
+ enum rfc2047_type type)
{
- static const int max_length = 78; /* per rfc2822 */
- static const int max_encoded_length = 76; /* per rfc2047 */
int i;
- int line_len = last_line_length(sb);
for (i = 0; i < len; i++) {
int ch = line[i];
if (non_ascii(ch) || ch == '\n')
- goto needquote;
+ return 1;
if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
- goto needquote;
+ return 1;
}
- strbuf_add_wrapped_bytes(sb, line, len, -line_len, 1, max_length);
- return;
-needquote:
+ return 0;
+}
+
+static void add_rfc2047(struct strbuf *sb, const char *line, int len,
+ const char *encoding, enum rfc2047_type type)
+{
+ static const int max_encoded_length = 76; /* per rfc2047 */
+ int i;
+ int line_len = last_line_length(sb);
+
strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
strbuf_addf(sb, "=?%s?q?", encoding);
line_len += strlen(encoding) + 5; /* 5 for =??q? */
const char *what, struct strbuf *sb,
const char *line, const char *encoding)
{
+ int max_length = 78; /* per rfc2822 */
char *date;
int namelen;
unsigned long time;
name_tail--;
display_name_length = name_tail - line;
strbuf_addstr(sb, "From: ");
- if (!has_rfc822_specials(line, display_name_length)) {
+ if (needs_rfc2047_encoding(line, display_name_length, RFC2047_ADDRESS)) {
add_rfc2047(sb, line, display_name_length,
encoding, RFC2047_ADDRESS);
- } else {
+ max_length = 76; /* per rfc2047 */
+ } else if (needs_rfc822_quoting(line, display_name_length)) {
struct strbuf quoted = STRBUF_INIT;
add_rfc822_quoted("ed, line, display_name_length);
- add_rfc2047(sb, quoted.buf, quoted.len,
- encoding, RFC2047_ADDRESS);
+ strbuf_add_wrapped_bytes(sb, quoted.buf, quoted.len,
+ -6, 1, max_length);
strbuf_release("ed);
+ } else {
+ strbuf_add_wrapped_bytes(sb, line, display_name_length,
+ -6, 1, max_length);
}
- if (namelen - display_name_length + last_line_length(sb) > 78) {
+ if (namelen - display_name_length + last_line_length(sb) > max_length) {
strbuf_addch(sb, '\n');
if (!isspace(name_tail[0]))
strbuf_addch(sb, ' ');
const char *encoding,
int need_8bit_cte)
{
+ static const int max_length = 78; /* per rfc2047 */
struct strbuf title;
strbuf_init(&title, 80);
strbuf_grow(sb, title.len + 1024);
if (pp->subject) {
strbuf_addstr(sb, pp->subject);
- add_rfc2047(sb, title.buf, title.len, encoding, RFC2047_SUBJECT);
+ if (needs_rfc2047_encoding(title.buf, title.len, RFC2047_SUBJECT))
+ add_rfc2047(sb, title.buf, title.len,
+ encoding, RFC2047_SUBJECT);
+ else
+ strbuf_add_wrapped_bytes(sb, title.buf, title.len,
+ -last_line_length(sb), 1, max_length);
} else {
strbuf_addbuf(sb, &title);
}