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authorLars Hjemli <hjemli@gmail.com>2008-09-14 09:45:37 +0200
committerLars Hjemli <hjemli@gmail.com>2008-09-15 22:33:11 +0200
commita8305a9543969206aa7cec03948c5a19950eedb9 (patch)
tree8e2cf67ec72bc296b76a4fcb6db5ec8250f0a502 /parsing.c
parentUpdate Makefile to use GIT-1.6.0.1 (diff)
downloadcgit-a8305a9543969206aa7cec03948c5a19950eedb9.tar.xz
cgit-a8305a9543969206aa7cec03948c5a19950eedb9.zip
parsing.c: be prepared for unexpected content in commit/tag objects
When parsing commits and tags cgit made too many assumptions about the formatting of said objects. This patch tries to make the code be more prepared to handle 'malformed' objects. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Diffstat (limited to 'parsing.c')
-rw-r--r--parsing.c159
1 files changed, 96 insertions, 63 deletions
diff --git a/parsing.c b/parsing.c
index 66e8b3d..c8f3048 100644
--- a/parsing.c
+++ b/parsing.c
@@ -62,6 +62,55 @@ char *substr(const char *head, const char *tail)
return buf;
}
+char *parse_user(char *t, char **name, char **email, unsigned long *date)
+{
+ char *p = t;
+ int mode = 1;
+
+ while (p && *p) {
+ if (mode == 1 && *p == '<') {
+ *name = substr(t, p - 1);
+ t = p;
+ mode++;
+ } else if (mode == 1 && *p == '\n') {
+ *name = substr(t, p);
+ p++;
+ break;
+ } else if (mode == 2 && *p == '>') {
+ *email = substr(t, p + 1);
+ t = p;
+ mode++;
+ } else if (mode == 2 && *p == '\n') {
+ *email = substr(t, p);
+ p++;
+ break;
+ } else if (mode == 3 && isdigit(*p)) {
+ *date = atol(p);
+ mode++;
+ } else if (*p == '\n') {
+ p++;
+ break;
+ }
+ p++;
+ }
+ return p;
+}
+
+const char *reencode(char **txt, const char *src_enc, const char *dst_enc)
+{
+ char *tmp;
+
+ if (!txt || !*txt || !src_enc || !dst_enc)
+ return *txt;
+
+ tmp = reencode_string(*txt, src_enc, dst_enc);
+ if (tmp) {
+ free(*txt);
+ *txt = tmp;
+ }
+ return *txt;
+}
+
struct commitinfo *cgit_parse_commit(struct commit *commit)
{
struct commitinfo *ret;
@@ -88,70 +137,57 @@ struct commitinfo *cgit_parse_commit(struct commit *commit)
while (!strncmp(p, "parent ", 7))
p += 48; // "parent " + hex[40] + "\n"
- if (!strncmp(p, "author ", 7)) {
- p += 7;
- t = strchr(p, '<') - 1;
- ret->author = substr(p, t);
- p = t;
- t = strchr(t, '>') + 1;
- ret->author_email = substr(p, t);
- ret->author_date = atol(t+1);
- p = strchr(t, '\n') + 1;
+ if (p && !strncmp(p, "author ", 7)) {
+ p = parse_user(p + 7, &ret->author, &ret->author_email,
+ &ret->author_date);
}
- if (!strncmp(p, "committer ", 9)) {
- p += 9;
- t = strchr(p, '<') - 1;
- ret->committer = substr(p, t);
- p = t;
- t = strchr(t, '>') + 1;
- ret->committer_email = substr(p, t);
- ret->committer_date = atol(t+1);
- p = strchr(t, '\n') + 1;
+ if (p && !strncmp(p, "committer ", 9)) {
+ p = parse_user(p + 9, &ret->committer, &ret->committer_email,
+ &ret->committer_date);
}
- if (!strncmp(p, "encoding ", 9)) {
+ if (p && !strncmp(p, "encoding ", 9)) {
p += 9;
- t = strchr(p, '\n') + 1;
- ret->msg_encoding = substr(p, t);
- p = t;
- } else
- ret->msg_encoding = xstrdup(PAGE_ENCODING);
+ t = strchr(p, '\n');
+ if (t) {
+ ret->msg_encoding = substr(p, t + 1);
+ p = t + 1;
+ }
+ }
- while (*p && (*p != '\n'))
- p = strchr(p, '\n') + 1; // skip unknown header fields
+ // skip unknown header fields
+ while (p && *p && (*p != '\n')) {
+ p = strchr(p, '\n');
+ if (p)
+ p++;
+ }
- while (*p == '\n')
- p = strchr(p, '\n') + 1;
+ // skip empty lines between headers and message
+ while (p && *p == '\n')
+ p++;
+
+ if (!p)
+ return ret;
t = strchr(p, '\n');
if (t) {
- if (*t == '\0')
- ret->subject = "** empty **";
- else
- ret->subject = substr(p, t);
+ ret->subject = substr(p, t);
p = t + 1;
- while (*p == '\n')
- p = strchr(p, '\n') + 1;
- ret->msg = xstrdup(p);
- } else
- ret->subject = substr(p, p+strlen(p));
-
- if(strcmp(ret->msg_encoding, PAGE_ENCODING)) {
- t = reencode_string(ret->subject, PAGE_ENCODING,
- ret->msg_encoding);
- if(t) {
- free(ret->subject);
- ret->subject = t;
+ while (p && *p == '\n') {
+ p = strchr(p, '\n');
+ if (p)
+ p++;
}
+ if (p)
+ ret->msg = xstrdup(p);
+ } else
+ ret->subject = xstrdup(p);
- t = reencode_string(ret->msg, PAGE_ENCODING,
- ret->msg_encoding);
- if(t) {
- free(ret->msg);
- ret->msg = t;
- }
+ if (ret->msg_encoding) {
+ reencode(&ret->subject, PAGE_ENCODING, ret->msg_encoding);
+ reencode(&ret->msg, PAGE_ENCODING, ret->msg_encoding);
}
return ret;
@@ -163,7 +199,7 @@ struct taginfo *cgit_parse_tag(struct tag *tag)
void *data;
enum object_type type;
unsigned long size;
- char *p, *t;
+ char *p;
struct taginfo *ret;
data = read_sha1_file(tag->object.sha1, &type, &size);
@@ -185,22 +221,19 @@ struct taginfo *cgit_parse_tag(struct tag *tag)
break;
if (!strncmp(p, "tagger ", 7)) {
- p += 7;
- t = strchr(p, '<') - 1;
- ret->tagger = substr(p, t);
- p = t;
- t = strchr(t, '>') + 1;
- ret->tagger_email = substr(p, t);
- ret->tagger_date = atol(t+1);
+ p = parse_user(p + 7, &ret->tagger, &ret->tagger_email,
+ &ret->tagger_date);
+ } else {
+ p = strchr(p, '\n');
+ if (p)
+ p++;
}
- p = strchr(p, '\n') + 1;
}
- while (p && *p && (*p != '\n'))
- p = strchr(p, '\n') + 1; // skip unknown tag fields
+ // skip empty lines between headers and message
+ while (p && *p == '\n')
+ p++;
- while (p && (*p == '\n'))
- p = strchr(p, '\n') + 1;
if (p && *p)
ret->msg = xstrdup(p);
free(data);