reencode_string(): introduce and use same_encoding()

diff --git a/builtin/mailinfo.c b/builtin/mailinfo.c
index eaf9e157a3897c2442756911b906ff9d3ee2be90..90b158d4f5c5b22a9493877dea6b08d568d637f9 100644 (file)
--- a/builtin/mailinfo.c
+++ b/builtin/mailinfo.c
@@ -19,9 +19,6 @@ static struct strbuf email = STRBUF_INIT;
 static enum  {
        TE_DONTCARE, TE_QP, TE_BASE64
 } transfer_encoding;
-static enum  {
-       TYPE_TEXT, TYPE_OTHER
-} message_type;
 
 static struct strbuf charset = STRBUF_INIT;
 static int patch_lines;
@@ -160,10 +157,9 @@ static int slurp_attr(const char *line, const char *name, struct strbuf *attr)
        const char *ends, *ap = strcasestr(line, name);
        size_t sz;
 
-       if (!ap) {
-               strbuf_setlen(attr, 0);
+       strbuf_setlen(attr, 0);
+       if (!ap)
                return 0;
-       }
        ap += strlen(name);
        if (*ap == '"') {
                ap++;
@@ -185,8 +181,6 @@ static void handle_content_type(struct strbuf *line)
        struct strbuf *boundary = xmalloc(sizeof(struct strbuf));
        strbuf_init(boundary, line->len);
 
-       if (!strcasestr(line->buf, "text/"))
-                message_type = TYPE_OTHER;
        if (slurp_attr(line->buf, "boundary=", boundary)) {
                strbuf_insert(boundary, 0, "--", 2);
                if (++content_top > &content[MAX_BOUNDARIES]) {
@@ -232,7 +226,9 @@ static void cleanup_subject(struct strbuf *subject)
                case 'r': case 'R':
                        if (subject->len <= at + 3)
                                break;
-                       if (!memcmp(subject->buf + at + 1, "e:", 2)) {
+                       if ((subject->buf[at + 1] == 'e' ||
+                            subject->buf[at + 1] == 'E') &&
+                           subject->buf[at + 2] == ':') {
                                strbuf_remove(subject, at, 3);
                                continue;
                        }
@@ -511,7 +507,7 @@ static void convert_to_utf8(struct strbuf *line, const char *charset)
                        return;
        }
 
-       if (!strcasecmp(metainfo_charset, charset))
+       if (same_encoding(metainfo_charset, charset))
                return;
        out = reencode_string(line->buf, metainfo_charset, charset);
        if (!out)
@@ -680,7 +676,6 @@ static int handle_boundary(void)
        /* set some defaults */
        transfer_encoding = TE_DONTCARE;
        strbuf_reset(&charset);
-       message_type = TYPE_TEXT;
 
        /* slurp in this section's info */
        while (read_one_header_line(&line, fin))
@@ -894,11 +889,6 @@ static void handle_body(void)
                        strbuf_insert(&line, 0, prev.buf, prev.len);
                        strbuf_reset(&prev);
 
-                       /* binary data most likely doesn't have newlines */
-                       if (message_type != TYPE_TEXT) {
-                               handle_filter(&line);
-                               break;
-                       }
                        /*
                         * This is a decoded line that may contain
                         * multiple new lines.  Pass only one chunk