Add a common commit parser

Make a better commit parser, replacing the ugly one in ui-log.c

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

3 files changed, 75 insertions, 63 deletions

diff --git a/cgit.h b/cgit.h
index 82e8681..268db53 100644
--- a/cgit.h
+++ b/cgit.h
@@ -15,6 +15,14 @@ struct cacheitem {
         int fd;
 };
 
+struct commitinfo {
+        struct commit *commit;
+        char *author;
+        char *committer;
+        char *subject;
+        char *msg;
+};
+
 extern const char cgit_version[];
 
 extern char *cgit_root;
@@ -63,6 +71,7 @@ extern void html_link_close(void);
 
 extern int cgit_read_config(const char *filename, configfn fn);
 extern int cgit_parse_query(char *txt, configfn fn);
+extern struct commitinfo *cgit_parse_commit(struct commit *commit);
 
 extern void cache_prepare(struct cacheitem *item);
 extern int cache_lock(struct cacheitem *item);
diff --git a/parsing.c b/parsing.c
index 98b3243..6cab0e9 100644
--- a/parsing.c
+++ b/parsing.c
@@ -104,3 +104,56 @@ int cgit_parse_query(char *txt, configfn fn)
                 (*fn)(txt, value);
         return 0;
 }
+
+char *substr(const char *head, const char *tail)
+{
+        char *buf;
+
+        buf = xmalloc(tail - head + 1);
+        strncpy(buf, head, tail - head);
+        buf[tail - head] = '\0';
+        return buf;
+}
+
+struct commitinfo *cgit_parse_commit(struct commit *commit)
+{
+        struct commitinfo *ret;
+        char *p = commit->buffer, *t = commit->buffer;
+
+        ret = xmalloc(sizeof(*ret));
+        ret->commit = commit;
+
+        if (strncmp(p, "tree ", 5))
+                die("Bad commit: %s", sha1_to_hex(commit->object.sha1));
+        else
+                p += 46; // "tree " + hex[40] + "\n"
+
+        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 = strchr(p, '\n') + 1;
+        }
+
+        if (!strncmp(p, "committer ", 9)) {
+                p += 9;
+                t = strchr(p, '<') - 1;
+                ret->committer = substr(p, t);
+                p = strchr(p, '\n') + 1;
+        }
+
+        while (*p == '\n')
+                p = strchr(p, '\n') + 1;
+
+        t = strchr(p, '\n');
+        ret->subject = substr(p, t);
+
+        while (*p == '\n')
+                p = strchr(p, '\n') + 1;
+        ret->msg = p;
+
+        return ret;
+}
diff --git a/ui-log.c b/ui-log.c
index dce50f7..31331ef 100644
--- a/ui-log.c
+++ b/ui-log.c
@@ -8,69 +8,14 @@
 
 #include "cgit.h"
 
-static int get_one_line(char *txt)
+void print_commit(struct commit *commit)
 {
-        char *t;
-
-        for(t=txt; *t != '\n' && t != '\0'; t++)
-                ;
-        *t = '\0';
-        return t-txt-1;
-}
-
-static void cgit_print_commit_shortlog(struct commit *commit)
-{
-        char *h, *t, *p; 
-        char *tree = NULL, *author = NULL, *subject = NULL;
-        int len;
-        time_t sec;
-        struct tm *time;
         char buf[32];
+        struct commitinfo *info;
+        struct tm *time;
 
-        h = t = commit->buffer;
-        
-        if (strncmp(h, "tree ", 5))
-                die("Bad commit format: %s", 
-                    sha1_to_hex(commit->object.sha1));
-        
-        len = get_one_line(h);
-        tree = h+5;
-        h += len + 2;
-
-        while (!strncmp(h, "parent ", 7))
-                h += get_one_line(h) + 2;
-        
-        if (!strncmp(h, "author ", 7)) {
-                author = h+7;
-                h += get_one_line(h) + 2;
-                t = author;
-                while(t!=h && *t!='<') 
-                        t++;
-                *t='\0';
-                p = t;
-                while(--t!=author && *t==' ')
-                        *t='\0';
-                while(++p!=h && *p!='>')
-                        ;
-                while(++p!=h && !isdigit(*p))
-                        ;
-
-                t = p;
-                while(++p && isdigit(*p))
-                        ;
-                *p = '\0';
-                sec = atoi(t);
-                time = gmtime(&sec);
-        }
-
-        while((len = get_one_line(h)) > 0)
-                h += len+2;
-
-        h++;
-        len = get_one_line(h);
-
-        subject = h;
-
+        info = cgit_parse_commit(commit);
+        time = gmtime(&commit->date);
         html("<tr><td>");
         strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", time);
         html_txt(buf);
@@ -78,18 +23,23 @@ static void cgit_print_commit_shortlog(struct commit *commit)
         char *qry = fmt("id=%s", sha1_to_hex(commit->object.sha1));
         char *url = cgit_pageurl(cgit_query_repo, "view", qry);
         html_link_open(url, NULL, NULL);
-        html_txt(subject);
+        html_txt(info->subject);
         html_link_close();
         html("</td><td>");
-        html_txt(author);
+        html_txt(info->author);
         html("</td><td><a href='");
         html_attr(cgit_pageurl(cgit_query_repo, "tree", 
                                fmt("id=%s", 
                                    sha1_to_hex(commit->tree->object.sha1))));
         html("'>tree</a>");
         html("</td></tr>\n");
+        free(info->author);
+        free(info->committer);
+        free(info->subject);
+        free(info);
 }
 
+
 void cgit_print_log(const char *tip, int ofs, int cnt)
 {
         struct rev_info rev;
@@ -120,7 +70,7 @@ void cgit_print_log(const char *tip, int ofs, int cnt)
         }
 
         for (i = 0; i < cnt && (commit = get_revision(&rev)) != NULL; i++) {
-                cgit_print_commit_shortlog(commit);
+                print_commit(commit);
                 free(commit->buffer);
                 commit->buffer = NULL;
                 free_commit_list(commit->parents);