[PATCH v4 01/19] hex: introduce parse_oid_hex
From: brian m. carlson <hidden>
Date: 2017-02-20 00:11:23
Subsystem:
the rest · Maintainer:
Linus Torvalds
Introduce a function, parse_oid_hex, which parses a hexadecimal object ID and if successful, sets a pointer to just beyond the last character. This allows for simpler, more robust parsing without needing to hard-code integer values throughout the codebase. Signed-off-by: brian m. carlson <redacted> --- cache.h | 9 +++++++++ hex.c | 8 ++++++++ 2 files changed, 17 insertions(+)
diff --git a/cache.h b/cache.h
index 61fc86e6d7..e03a672d15 100644
--- a/cache.h
+++ b/cache.h@@ -1319,6 +1319,15 @@ extern char *oid_to_hex_r(char *out, const struct object_id *oid); extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */ extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */ +/* + * Parse a 40-character hexadecimal object ID starting from hex, updating the + * pointer specified by end when parsing stops. The resulting object ID is + * stored in oid. Returns 0 on success. Parsing will stop on the first NUL or + * other invalid character. end is only updated on success; otherwise, it is + * unmodified. + */ +extern int parse_oid_hex(const char *hex, struct object_id *oid, const char **end); + extern int interpret_branch_name(const char *str, int len, struct strbuf *); extern int get_oid_mb(const char *str, struct object_id *oid);
diff --git a/hex.c b/hex.c
index 845b01a874..eab7b626ee 100644
--- a/hex.c
+++ b/hex.c@@ -53,6 +53,14 @@ int get_oid_hex(const char *hex, struct object_id *oid) return get_sha1_hex(hex, oid->hash); } +int parse_oid_hex(const char *hex, struct object_id *oid, const char **end) +{ + int ret = get_oid_hex(hex, oid); + if (!ret) + *end = hex + GIT_SHA1_HEXSZ; + return ret; +} + char *sha1_to_hex_r(char *buffer, const unsigned char *sha1) { static const char hex[] = "0123456789abcdef";
--
2.11.0