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fsck: provide a function to parse fsck message IDs

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These functions will be used in the next commits to allow the user to
ask fsck to handle specific problems differently, e.g. demoting certain
errors to warnings. The upcoming `fsck_set_msg_types()` function has to
handle partial strings because we would like to be able to parse, say,
'missingemail=warn,missingtaggerentry=warn' command line parameters
(which will be passed by receive-pack to index-pack and unpack-objects).

To make the parsing robust, we generate strings from the enum keys, and
using these keys, we match up strings without dashes case-insensitively
to the corresponding enum values.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin 2015-06-22 17:25:14 +02:00 committed by Junio C Hamano
parent c99ba492f1
commit f417eed8cd
1 changed files with 33 additions and 2 deletions
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35
fsck.c
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@ -63,15 +63,46 @@ enum fsck_msg_id {
};
#undef MSG_ID
#define MSG_ID(id, msg_type) { FSCK_##msg_type },
#define STR(x) #x
#define MSG_ID(id, msg_type) { STR(id), NULL, FSCK_##msg_type },
static struct {
const char *id_string;
const char *downcased;
int msg_type;
} msg_id_info[FSCK_MSG_MAX + 1] = {
FOREACH_MSG_ID(MSG_ID)
{ -1 }
{ NULL, NULL, -1 }
};
#undef MSG_ID
static int parse_msg_id(const char *text)
{
int i;
if (!msg_id_info[0].downcased) {
/* convert id_string to lower case, without underscores. */
for (i = 0; i < FSCK_MSG_MAX; i++) {
const char *p = msg_id_info[i].id_string;
int len = strlen(p);
char *q = xmalloc(len);
msg_id_info[i].downcased = q;
while (*p)
if (*p == '_')
p++;
else
*(q)++ = tolower(*(p)++);
*q = '\0';
}
}
for (i = 0; i < FSCK_MSG_MAX; i++)
if (!strcmp(text, msg_id_info[i].downcased))
return i;
return -1;
}
static int fsck_msg_type(enum fsck_msg_id msg_id,
struct fsck_options *options)
{