From f026358ef20e0c252388a41fcc8eff125b00927c Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Sun, 5 Feb 2012 17:31:51 -0800 Subject: [PATCH] mailmap: always return a plain mail address from map_user() The callers of map_user() give email and name to it, and expect to get the up-to-date email and/or name to be used in their output. The function rewrites the given buffers in place. To optimize the majority of cases, the function returns 0 when it did not do anything, and it returns 1 when the caller should use the updated contents. The 'email' input to the function is terminated by '>' or a NUL (whichever comes first) for historical reasons, but when a rewrite happens, the value is replaced with the mailbox inside the <> pair. However, it failed to meet this expectation when it only rewrote the name part without rewriting the email part, and the email in the input was terminated by '>'. This causes an extra '>' to appear in the output of "blame -e", because the caller does send in '>'-terminated email, and when the function returned 1 to tell it that rewriting happened, it appends '>' that is necessary when the email part was rewritten. The patch looks bigger than it actually is, because this change makes a variable that points at the end of the email part in the input 'p' live much longer than it used to, deserving a more descriptive name. Noticed and diagnosed by Felipe Contreras and Jeff King. Signed-off-by: Junio C Hamano --- mailmap.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/mailmap.c b/mailmap.c index 8c3196c7d..47aa41924 100644 --- a/mailmap.c +++ b/mailmap.c @@ -190,27 +190,27 @@ void clear_mailmap(struct string_list *map) int map_user(struct string_list *map, char *email, int maxlen_email, char *name, int maxlen_name) { - char *p; + char *end_of_email; struct string_list_item *item; struct mailmap_entry *me; char buf[1024], *mailbuf; int i; /* figure out space requirement for email */ - p = strchr(email, '>'); - if (!p) { + end_of_email = strchr(email, '>'); + if (!end_of_email) { /* email passed in might not be wrapped in <>, but end with a \0 */ - p = memchr(email, '\0', maxlen_email); - if (!p) + end_of_email = memchr(email, '\0', maxlen_email); + if (!end_of_email) return 0; } - if (p - email + 1 < sizeof(buf)) + if (end_of_email - email + 1 < sizeof(buf)) mailbuf = buf; else - mailbuf = xmalloc(p - email + 1); + mailbuf = xmalloc(end_of_email - email + 1); /* downcase the email address */ - for (i = 0; i < p - email; i++) + for (i = 0; i < end_of_email - email; i++) mailbuf[i] = tolower(email[i]); mailbuf[i] = 0; @@ -236,6 +236,8 @@ int map_user(struct string_list *map, } if (maxlen_email && mi->email) strlcpy(email, mi->email, maxlen_email); + else + *end_of_email = '\0'; if (maxlen_name && mi->name) strlcpy(name, mi->name, maxlen_name); debug_mm("map_user: to '%s' <%s>\n", name, mi->email ? mi->email : ""); -- 2.30.2