t4039: abstract away SHA-1-specific constants

[thirdparty/git.git] / oidset.c

diff --git a/oidset.c b/oidset.c
index 8bdecb13de1e0d0f24bfccb27dd46cdf64b27cff..f63ce818f67766378485ab16075dd11e87c00ca0 100644 (file)
--- a/oidset.c
+++ b/oidset.c
@@ -35,3 +35,38 @@ void oidset_clear(struct oidset *set)
        kh_release_oid_set(&set->set);
        oidset_init(set, 0);
 }
+
+void oidset_parse_file(struct oidset *set, const char *path)
+{
+       FILE *fp;
+       struct strbuf sb = STRBUF_INIT;
+       struct object_id oid;
+
+       fp = fopen(path, "r");
+       if (!fp)
+               die("could not open object name list: %s", path);
+       while (!strbuf_getline(&sb, fp)) {
+               const char *p;
+               const char *name;
+
+               /*
+                * Allow trailing comments, leading whitespace
+                * (including before commits), and empty or whitespace
+                * only lines.
+                */
+               name = strchr(sb.buf, '#');
+               if (name)
+                       strbuf_setlen(&sb, name - sb.buf);
+               strbuf_trim(&sb);
+               if (!sb.len)
+                       continue;
+
+               if (parse_oid_hex(sb.buf, &oid, &p) || *p != '\0')
+                       die("invalid object name: %s", sb.buf);
+               oidset_insert(set, &oid);
+       }
+       if (ferror(fp))
+               die_errno("Could not read '%s'", path);
+       fclose(fp);
+       strbuf_release(&sb);
+}