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f9e88544f5
When doing the binary search over restart points in a block we need to decode the record keys. This decoding step can result in an error when the block is corrupted, which we indicate to the caller of the binary search by setting `args.error = 1`. But the only caller that exists mishandles this because it in fact performs the error check before calling `binsearch()`. Fix this bug by checking for errors at the right point in time. Furthermore, refactor `binsearch()` so that it aborts the search in case the callback function returns a negative value so that we don't needlessly continue to search the block. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/*
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Copyright 2020 Google LLC
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file or at
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https://developers.google.com/open-source/licenses/bsd
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*/
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#ifndef BASICS_H
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#define BASICS_H
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/*
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* miscellaneous utilities that are not provided by Git.
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*/
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#include "system.h"
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/* Bigendian en/decoding of integers */
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void put_be24(uint8_t *out, uint32_t i);
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uint32_t get_be24(uint8_t *in);
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void put_be16(uint8_t *out, uint16_t i);
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/*
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* find smallest index i in [0, sz) at which `f(i) > 0`, assuming that f is
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* ascending. Return sz if `f(i) == 0` for all indices. The search is aborted
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* and `sz` is returned in case `f(i) < 0`.
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*
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* Contrary to bsearch(3), this returns something useful if the argument is not
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* found.
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*/
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size_t binsearch(size_t sz, int (*f)(size_t k, void *args), void *args);
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/*
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* Frees a NULL terminated array of malloced strings. The array itself is also
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* freed.
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*/
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void free_names(char **a);
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/* parse a newline separated list of names. `size` is the length of the buffer,
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* without terminating '\0'. Empty names are discarded. */
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void parse_names(char *buf, int size, char ***namesp);
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/* compares two NULL-terminated arrays of strings. */
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int names_equal(char **a, char **b);
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/* returns the array size of a NULL-terminated array of strings. */
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size_t names_length(char **names);
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/* Allocation routines; they invoke the functions set through
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* reftable_set_alloc() */
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void *reftable_malloc(size_t sz);
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void *reftable_realloc(void *p, size_t sz);
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void reftable_free(void *p);
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void *reftable_calloc(size_t nelem, size_t elsize);
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#define REFTABLE_ALLOC_ARRAY(x, alloc) (x) = reftable_malloc(st_mult(sizeof(*(x)), (alloc)))
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#define REFTABLE_CALLOC_ARRAY(x, alloc) (x) = reftable_calloc((alloc), sizeof(*(x)))
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#define REFTABLE_REALLOC_ARRAY(x, alloc) (x) = reftable_realloc((x), st_mult(sizeof(*(x)), (alloc)))
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#define REFTABLE_ALLOC_GROW(x, nr, alloc) \
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do { \
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if ((nr) > alloc) { \
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alloc = 2 * (alloc) + 1; \
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if (alloc < (nr)) \
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alloc = (nr); \
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REFTABLE_REALLOC_ARRAY(x, alloc); \
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} \
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} while (0)
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/* Find the longest shared prefix size of `a` and `b` */
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struct strbuf;
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int common_prefix_size(struct strbuf *a, struct strbuf *b);
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#endif
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