| /* |
| Copyright 2020 Google LLC |
| |
| Use of this source code is governed by a BSD-style |
| license that can be found in the LICENSE file or at |
| https://developers.google.com/open-source/licenses/bsd |
| */ |
| |
| #ifndef REFTABLE_RECORD_H |
| #define REFTABLE_RECORD_H |
| |
| #include "hash-ll.h" |
| #include <stdint.h> |
| |
| /* |
| * Basic data types |
| * |
| * Reftables store the state of each ref in struct reftable_ref_record, and they |
| * store a sequence of reflog updates in struct reftable_log_record. |
| */ |
| |
| /* reftable_ref_record holds a ref database entry target_value */ |
| struct reftable_ref_record { |
| char *refname; /* Name of the ref, malloced. */ |
| uint64_t update_index; /* Logical timestamp at which this value is |
| * written */ |
| |
| enum { |
| /* tombstone to hide deletions from earlier tables */ |
| REFTABLE_REF_DELETION = 0x0, |
| |
| /* a simple ref */ |
| REFTABLE_REF_VAL1 = 0x1, |
| /* a tag, plus its peeled hash */ |
| REFTABLE_REF_VAL2 = 0x2, |
| |
| /* a symbolic reference */ |
| REFTABLE_REF_SYMREF = 0x3, |
| #define REFTABLE_NR_REF_VALUETYPES 4 |
| } value_type; |
| union { |
| unsigned char val1[GIT_MAX_RAWSZ]; |
| struct { |
| unsigned char value[GIT_MAX_RAWSZ]; /* first hash */ |
| unsigned char target_value[GIT_MAX_RAWSZ]; /* second hash */ |
| } val2; |
| char *symref; /* referent, malloced 0-terminated string */ |
| } value; |
| }; |
| |
| /* Returns the first hash, or NULL if `rec` is not of type |
| * REFTABLE_REF_VAL1 or REFTABLE_REF_VAL2. */ |
| const unsigned char *reftable_ref_record_val1(const struct reftable_ref_record *rec); |
| |
| /* Returns the second hash, or NULL if `rec` is not of type |
| * REFTABLE_REF_VAL2. */ |
| const unsigned char *reftable_ref_record_val2(const struct reftable_ref_record *rec); |
| |
| /* returns whether 'ref' represents a deletion */ |
| int reftable_ref_record_is_deletion(const struct reftable_ref_record *ref); |
| |
| /* prints a reftable_ref_record onto stdout. Useful for debugging. */ |
| void reftable_ref_record_print(const struct reftable_ref_record *ref, |
| uint32_t hash_id); |
| |
| /* frees and nulls all pointer values inside `ref`. */ |
| void reftable_ref_record_release(struct reftable_ref_record *ref); |
| |
| /* returns whether two reftable_ref_records are the same. Useful for testing. */ |
| int reftable_ref_record_equal(const struct reftable_ref_record *a, |
| const struct reftable_ref_record *b, int hash_size); |
| |
| /* reftable_log_record holds a reflog entry */ |
| struct reftable_log_record { |
| char *refname; |
| uint64_t update_index; /* logical timestamp of a transactional update. |
| */ |
| |
| enum { |
| /* tombstone to hide deletions from earlier tables */ |
| REFTABLE_LOG_DELETION = 0x0, |
| |
| /* a simple update */ |
| REFTABLE_LOG_UPDATE = 0x1, |
| #define REFTABLE_NR_LOG_VALUETYPES 2 |
| } value_type; |
| |
| union { |
| struct { |
| uint8_t *new_hash; |
| uint8_t *old_hash; |
| char *name; |
| char *email; |
| uint64_t time; |
| int16_t tz_offset; |
| char *message; |
| } update; |
| } value; |
| }; |
| |
| /* returns whether 'ref' represents the deletion of a log record. */ |
| int reftable_log_record_is_deletion(const struct reftable_log_record *log); |
| |
| /* frees and nulls all pointer values. */ |
| void reftable_log_record_release(struct reftable_log_record *log); |
| |
| /* returns whether two records are equal. Useful for testing. */ |
| int reftable_log_record_equal(const struct reftable_log_record *a, |
| const struct reftable_log_record *b, int hash_size); |
| |
| /* dumps a reftable_log_record on stdout, for debugging/testing. */ |
| void reftable_log_record_print(struct reftable_log_record *log, |
| uint32_t hash_id); |
| |
| #endif |