902bb36451
This is a generally useful abstraction, so let's let others make use of it. The refactoring is more or less a straight copy; however, functions and struct members have had their names changed to match string_list, which is the most similar data structure. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
44 lines
956 B
C
44 lines
956 B
C
#include "cache.h"
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#include "sha1-array.h"
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#include "sha1-lookup.h"
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void sha1_array_append(struct sha1_array *array, const unsigned char *sha1)
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{
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ALLOC_GROW(array->sha1, array->nr + 1, array->alloc);
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hashcpy(array->sha1[array->nr++], sha1);
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array->sorted = 0;
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}
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static int void_hashcmp(const void *a, const void *b)
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{
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return hashcmp(a, b);
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}
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void sha1_array_sort(struct sha1_array *array)
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{
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qsort(array->sha1, array->nr, sizeof(*array->sha1), void_hashcmp);
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array->sorted = 1;
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}
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static const unsigned char *sha1_access(size_t index, void *table)
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{
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unsigned char (*array)[20] = table;
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return array[index];
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}
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int sha1_array_lookup(struct sha1_array *array, const unsigned char *sha1)
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{
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if (!array->sorted)
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sha1_array_sort(array);
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return sha1_pos(sha1, array->sha1, array->nr, sha1_access);
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}
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void sha1_array_clear(struct sha1_array *array)
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{
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free(array->sha1);
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array->sha1 = NULL;
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array->nr = 0;
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array->alloc = 0;
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array->sorted = 0;
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}
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