Add sc_vector
Adapt vlc_vector [1], that I initially wrote while implementing the VLC
playlist [2].
Change the implementation to use "statement expressions" [3], which are
forbidden in VLC because "non-standard", but:
- they are supported by gcc and clang;
- they are already used in the scrcpy codebase;
- they avoid implementation hacks (VLC_VECTOR_FAILFLAG_);
- they allow a better API (sc_vector_index_of() may return the result
without an output parameter).
PR #3035 <https://github.com/Genymobile/scrcpy/pull/3035>
[1]: 0857947aba/include/vlc_vector.h
[2]: https://blog.rom1v.com/2019/05/a-new-core-playlist-for-vlc-4
[3]: https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html
This commit is contained in:
Romain Vimont
parent
36c75e15b8
commit
c070723bc8
3 changed files with 963 additions and 0 deletions
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@ -282,6 +282,9 @@ if get_option('buildtype') == 'debug'
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'src/util/str.c',
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'src/util/strbuf.c',
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]],
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['test_vector', [
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'tests/test_vector.c',
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]],
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]
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foreach t : tests
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539
app/src/util/vector.h
Normal file
539
app/src/util/vector.h
Normal file
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@ -0,0 +1,539 @@
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#ifndef SC_VECTOR_H
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#define SC_VECTOR_H
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#include "common.h"
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#include <stdbool.h>
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#include <stddef.h>
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// Adapted from vlc_vector:
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// <https://code.videolan.org/videolan/vlc/-/blob/0857947abaed9c89810cd96353aaa1b7e6ba3b0d/include/vlc_vector.h>
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/**
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* Vector struct body
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*
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* A vector is a dynamic array, managed by the sc_vector_* helpers.
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*
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* It is generic over the type of its items, so it is implemented as macros.
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*
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* To use a vector, a new type must be defined:
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*
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* struct vec_int SC_VECTOR(int);
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*
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* The struct may be anonymous:
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*
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* struct SC_VECTOR(const char *) names;
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*
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* Vector size is accessible via `vec.size`, and items are intended to be
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* accessed directly, via `vec.data[i]`.
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*
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* Functions and macros having name ending with '_' are private.
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*/
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#define SC_VECTOR(type) \
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{ \
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size_t cap; \
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size_t size; \
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type *data; \
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}
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/**
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* Static initializer for a vector
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*/
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#define SC_VECTOR_INITIALIZER { 0, 0, NULL }
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/**
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* Initialize an empty vector
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*/
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#define sc_vector_init(pv) \
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({ \
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(pv)->cap = 0; \
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(pv)->size = 0; \
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(pv)->data = NULL; \
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})
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/**
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* Destroy a vector
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*
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* The vector may not be used anymore unless sc_vector_init() is called.
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*/
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#define sc_vector_destroy(pv) \
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free((pv)->data)
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/**
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* Clear a vector
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*
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* Remove all items from the vector.
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*/
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#define sc_vector_clear(pv) \
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({ \
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sc_vector_destroy(pv); \
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sc_vector_init(pv);\
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})
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/**
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* The minimal allocation size, in number of items
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*
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* Private.
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*/
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#define SC_VECTOR_MINCAP_ ((size_t) 10)
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static inline size_t
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sc_vector_min_(size_t a, size_t b)
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{
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return a < b ? a : b;
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}
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static inline size_t
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sc_vector_max_(size_t a, size_t b)
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{
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return a > b ? a : b;
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}
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static inline size_t
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sc_vector_clamp_(size_t x, size_t min, size_t max)
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{
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return sc_vector_max_(min, sc_vector_min_(max, x));
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}
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/**
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* Realloc data and update vector fields
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*
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* On reallocation success, update the vector capacity (*pcap) and size
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* (*psize), and return the reallocated data.
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*
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* On reallocation failure, return NULL without any change.
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*
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* Private.
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*
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* \param ptr the current `data` field of the vector to realloc
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* \param count the requested capacity, in number of items
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* \param size the size of one item
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* \param pcap a pointer to the `cap` field of the vector [IN/OUT]
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* \param psize a pointer to the `size` field of the vector [IN/OUT]
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* \return the new ptr on success, NULL on error
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*/
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static inline void *
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sc_vector_reallocdata_(void *ptr, size_t count, size_t size,
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size_t *restrict pcap, size_t *restrict psize)
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{
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void *p = realloc(ptr, count * size);
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if (!p) {
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return NULL;
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}
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*pcap = count;
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*psize = sc_vector_min_(*psize, count);
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return p;
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}
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#define sc_vector_realloc_(pv, newcap) \
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({ \
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void *p = sc_vector_reallocdata_((pv)->data, newcap, sizeof(*(pv)->data), \
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&(pv)->cap, &(pv)->size); \
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if (p) { \
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(pv)->data = p; \
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} \
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(bool) p; \
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});
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#define sc_vector_resize_(pv, newcap) \
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({ \
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bool ok; \
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if ((pv)->cap == (newcap)) { \
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ok = true; \
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} else if ((newcap) > 0) { \
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ok = sc_vector_realloc_(pv, (newcap)); \
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} else { \
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sc_vector_clear(pv); \
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ok = true; \
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} \
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ok; \
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})
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static inline size_t
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sc_vector_growsize_(size_t value)
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{
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/* integer multiplication by 1.5 */
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return value + (value >> 1);
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}
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/* SIZE_MAX/2 to fit in ssize_t, and so that cap*1.5 does not overflow. */
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#define sc_vector_max_cap_(pv) (SIZE_MAX / 2 / sizeof(*(pv)->data))
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/**
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* Increase the capacity of the vector to at least `mincap`
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*
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* \param pv a pointer to the vector
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* \param mincap (size_t) the requested capacity
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* \retval true if no allocation failed
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* \retval false on allocation failure (the vector is left untouched)
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*/
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#define sc_vector_reserve(pv, mincap) \
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({ \
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bool ok; \
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/* avoid to allocate tiny arrays (< SC_VECTOR_MINCAP_) */ \
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size_t mincap_ = sc_vector_max_(mincap, SC_VECTOR_MINCAP_); \
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if (mincap_ <= (pv)->cap) { \
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/* nothing to do */ \
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ok = true; \
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} else if (mincap_ <= sc_vector_max_cap_(pv)) { \
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/* not too big */ \
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size_t newsize = sc_vector_growsize_((pv)->cap); \
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newsize = sc_vector_clamp_(newsize, mincap_, sc_vector_max_cap_(pv)); \
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ok = sc_vector_realloc_(pv, newsize); \
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} else { \
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ok = false; \
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} \
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ok; \
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})
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#define sc_vector_shrink_to_fit(pv) \
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/* decreasing the size may not fail */ \
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(void) sc_vector_resize_(pv, (pv)->size)
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/**
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* Resize the vector down automatically
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*
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* Shrink only when necessary (in practice when cap > (size+5)*1.5)
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*
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* \param pv a pointer to the vector
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*/
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#define sc_vector_autoshrink(pv) \
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({ \
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bool must_shrink = \
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/* do not shrink to tiny size */ \
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(pv)->cap > SC_VECTOR_MINCAP_ && \
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/* no need to shrink */ \
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(pv)->cap >= sc_vector_growsize_((pv)->size + 5); \
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if (must_shrink) { \
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size_t newsize = sc_vector_max_((pv)->size + 5, SC_VECTOR_MINCAP_); \
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sc_vector_resize_(pv, newsize); \
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} \
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})
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#define sc_vector_check_same_ptr_type_(a, b) \
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(void) ((a) == (b)) /* warn on type mismatch */
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/**
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* Push an item at the end of the vector
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*
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* The amortized complexity is O(1).
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*
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* \param pv a pointer to the vector
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* \param item the item to append
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* \retval true if no allocation failed
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* \retval false on allocation failure (the vector is left untouched)
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*/
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#define sc_vector_push(pv, item) \
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({ \
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bool ok = sc_vector_reserve(pv, (pv)->size + 1); \
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if (ok) { \
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(pv)->data[(pv)->size++] = (item); \
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} \
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ok; \
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})
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/**
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* Append `count` items at the end of the vector
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*
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* \param pv a pointer to the vector
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* \param items the items array to append
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* \param count the number of items in the array
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* \retval true if no allocation failed
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* \retval false on allocation failure (the vector is left untouched)
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*/
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#define sc_vector_push_all(pv, items, count) \
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sc_vector_push_all_(pv, items, (size_t) count)
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#define sc_vector_push_all_(pv, items, count) \
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({ \
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sc_vector_check_same_ptr_type_((pv)->data, items); \
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bool ok = sc_vector_reserve(pv, (pv)->size + (count)); \
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if (ok) { \
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memcpy(&(pv)->data[(pv)->size], items, (count) * sizeof(*(pv)->data)); \
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(pv)->size += count; \
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} \
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ok; \
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})
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/**
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* Insert an hole of size `count` to the given index
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*
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* The items in range [index; size-1] will be moved. The items in the hole are
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* left uninitialized.
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*
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* \param pv a pointer to the vector
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* \param index the index where the hole is to be inserted
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* \param count the number of items in the hole
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* \retval true if no allocation failed
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* \retval false on allocation failure (the vector is left untouched)
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*/
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#define sc_vector_insert_hole(pv, index, count) \
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sc_vector_insert_hole_(pv, (size_t) index, (size_t) count);
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#define sc_vector_insert_hole_(pv, index, count) \
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({ \
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bool ok = sc_vector_reserve(pv, (pv)->size + (count)); \
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if (ok) { \
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if ((index) < (pv)->size) { \
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memmove(&(pv)->data[(index) + (count)], \
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&(pv)->data[(index)], \
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((pv)->size - (index)) * sizeof(*(pv)->data)); \
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} \
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(pv)->size += count; \
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} \
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ok; \
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})
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/**
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* Insert an item at the given index
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*
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* The items in range [index; size-1] will be moved.
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*
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* \param pv a pointer to the vector
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* \param index the index where the item is to be inserted
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* \param item the item to append
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* \retval true if no allocation failed
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* \retval false on allocation failure (the vector is left untouched)
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*/
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#define sc_vector_insert(pv, index, item) \
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sc_vector_insert_(pv, (size_t) index, (size_t) item);
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#define sc_vector_insert_(pv, index, item) \
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({ \
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bool ok = sc_vector_insert_hole_(pv, index, 1); \
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if (ok) { \
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(pv)->data[index] = (item); \
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} \
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ok; \
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})
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/**
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* Insert `count` items at the given index
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*
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* The items in range [index; size-1] will be moved.
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*
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* \param pv a pointer to the vector
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* \param index the index where the items are to be inserted
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* \param items the items array to append
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* \param count the number of items in the array
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* \retval true if no allocation failed
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* \retval false on allocation failure (the vector is left untouched)
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*/
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#define sc_vector_insert_all(pv, index, items, count) \
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sc_vector_insert_all_(pv, (size_t) index, items, (size_t) count)
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#define sc_vector_insert_all_(pv, index, items, count) \
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({ \
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sc_vector_check_same_ptr_type_((pv)->data, items); \
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bool ok = sc_vector_insert_hole_(pv, index, count); \
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if (ok) { \
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memcpy(&(pv)->data[index], items, count * sizeof(*(pv)->data)); \
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} \
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ok; \
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})
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/** Reverse a char array in place */
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static inline void
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sc_char_array_reverse(char *array, size_t len)
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{
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for (size_t i = 0; i < len / 2; ++i)
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{
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char c = array[i];
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array[i] = array[len - i - 1];
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array[len - i - 1] = c;
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}
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}
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/**
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* Right-rotate a (char) array in place
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*
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* For example, left-rotating a char array containing {1, 2, 3, 4, 5, 6} with
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* distance 4 will result in {5, 6, 1, 2, 3, 4}.
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*
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* Private.
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*/
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static inline void
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sc_char_array_rotate_left(char *array, size_t len, size_t distance)
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{
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sc_char_array_reverse(array, distance);
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sc_char_array_reverse(&array[distance], len - distance);
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sc_char_array_reverse(array, len);
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}
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/**
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* Right-rotate a (char) array in place
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*
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* For example, left-rotating a char array containing {1, 2, 3, 4, 5, 6} with
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* distance 2 will result in {5, 6, 1, 2, 3, 4}.
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*
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* Private.
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*/
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static inline void
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sc_char_array_rotate_right(char *array, size_t len, size_t distance)
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{
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sc_char_array_rotate_left(array, len, len - distance);
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}
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/**
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* Move items in a (char) array in place
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*
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* Move slice [index, count] to target.
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*/
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static inline void
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sc_char_array_move(char *array, size_t idx, size_t count, size_t target)
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{
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if (idx < target) {
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sc_char_array_rotate_left(&array[idx], target - idx + count, count);
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} else {
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sc_char_array_rotate_right(&array[target], idx - target + count, count);
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}
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}
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/**
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* Move a slice of items to a given target index
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*
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* The items in range [index; count] will be moved so that the *new* position
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* of the first item is `target`.
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*
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* \param pv a pointer to the vector
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* \param index the index of the first item to move
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* \param count the number of items to move
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* \param target the new index of the moved slice
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*/
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#define sc_vector_move_slice(pv, index, count, target) \
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sc_vector_move_slice_(pv, (size_t) index, count, (size_t) target);
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#define sc_vector_move_slice_(pv, index, count, target) \
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({ \
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sc_char_array_move((char *) (pv)->data, \
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(index) * sizeof(*(pv)->data), \
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(count) * sizeof(*(pv)->data), \
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(target) * sizeof(*(pv)->data)); \
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})
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/**
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* Move an item to a given target index
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*
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* The items will be moved so that its *new* position is `target`.
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*
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* \param pv a pointer to the vector
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* \param index the index of the item to move
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* \param target the new index of the moved item
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*/
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#define sc_vector_move(pv, index, target) \
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sc_vector_move_slice(pv, index, 1, target)
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/**
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* Remove a slice of items, without shrinking the array
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*
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* If you have no good reason to use the _noshrink() version, use
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* sc_vector_remove_slice() instead.
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*
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* The items in range [index+count; size-1] will be moved.
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*
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* \param pv a pointer to the vector
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* \param index the index of the first item to remove
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* \param count the number of items to remove
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*/
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#define sc_vector_remove_slice_noshrink(pv, index, count) \
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sc_vector_remove_slice_noshrink_(pv, (size_t) index, (size_t) count)
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#define sc_vector_remove_slice_noshrink_(pv, index, count) \
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({ \
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if ((index) + (count) < (pv)->size) { \
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memmove(&(pv)->data[index], \
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&(pv)->data[(index) + (count)], \
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((pv)->size - (index) - (count)) * sizeof(*(pv)->data)); \
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} \
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(pv)->size -= count; \
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})
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/**
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* Remove a slice of items
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*
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* The items in range [index+count; size-1] will be moved.
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*
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* \param pv a pointer to the vector
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* \param index the index of the first item to remove
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* \param count the number of items to remove
|
||||
*/
|
||||
#define sc_vector_remove_slice(pv, index, count) \
|
||||
({ \
|
||||
sc_vector_remove_slice_noshrink(pv, index, count); \
|
||||
sc_vector_autoshrink(pv); \
|
||||
})
|
||||
|
||||
/**
|
||||
* Remove an item, without shrinking the array
|
||||
*
|
||||
* If you have no good reason to use the _noshrink() version, use
|
||||
* sc_vector_remove() instead.
|
||||
*
|
||||
* The items in range [index+1; size-1] will be moved.
|
||||
*
|
||||
* \param pv a pointer to the vector
|
||||
* \param index the index of item to remove
|
||||
*/
|
||||
#define sc_vector_remove_noshrink(pv, index) \
|
||||
sc_vector_remove_slice_noshrink(pv, index, 1)
|
||||
|
||||
/**
|
||||
* Remove an item
|
||||
*
|
||||
* The items in range [index+1; size-1] will be moved.
|
||||
*
|
||||
* \param pv a pointer to the vector
|
||||
* \param index the index of item to remove
|
||||
*/
|
||||
#define sc_vector_remove(pv, index) \
|
||||
({ \
|
||||
sc_vector_remove_noshrink(pv, index); \
|
||||
sc_vector_autoshrink(pv); \
|
||||
})
|
||||
|
||||
/**
|
||||
* Remove an item
|
||||
*
|
||||
* The removed item is replaced by the last item of the vector.
|
||||
*
|
||||
* This does not preserve ordering, but is O(1). This is useful when the order
|
||||
* of items is not meaningful.
|
||||
*
|
||||
* \param pv a pointer to the vector
|
||||
* \param index the index of item to remove
|
||||
*/
|
||||
#define sc_vector_swap_remove(pv, index) \
|
||||
sc_vector_swap_remove_(pv, (size_t) index);
|
||||
|
||||
#define sc_vector_swap_remove_(pv, index) \
|
||||
({ \
|
||||
(pv)->data[index] = (pv)->data[(pv)->size-1]; \
|
||||
(pv)->size--; \
|
||||
});
|
||||
|
||||
/**
|
||||
* Return the index of an item
|
||||
*
|
||||
* Iterate over all items to find a given item.
|
||||
*
|
||||
* Use only for vectors of primitive types or pointers.
|
||||
*
|
||||
* Return the index, or -1 if not found.
|
||||
*
|
||||
* \param pv a pointer to the vector
|
||||
* \param item the item to find (compared with ==)
|
||||
*/
|
||||
#define sc_vector_index_of(pv, item) \
|
||||
({ \
|
||||
ssize_t idx = -1; \
|
||||
for (size_t i = 0; i < (pv)->size; ++i) { \
|
||||
if ((pv)->data[i] == (item)) { \
|
||||
idx = (ssize_t) i; \
|
||||
break; \
|
||||
} \
|
||||
} \
|
||||
idx; \
|
||||
})
|
||||
|
||||
#endif
|
||||
421
app/tests/test_vector.c
Normal file
421
app/tests/test_vector.c
Normal file
|
|
@ -0,0 +1,421 @@
|
|||
#include "common.h"
|
||||
|
||||
#include <assert.h>
|
||||
|
||||
#include "util/vector.h"
|
||||
|
||||
static void test_vector_insert_remove(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
bool ok;
|
||||
|
||||
ok = sc_vector_push(&vec, 42);
|
||||
assert(ok);
|
||||
assert(vec.data[0] == 42);
|
||||
assert(vec.size == 1);
|
||||
|
||||
ok = sc_vector_push(&vec, 37);
|
||||
assert(ok);
|
||||
assert(vec.size == 2);
|
||||
assert(vec.data[0] == 42);
|
||||
assert(vec.data[1] == 37);
|
||||
|
||||
ok = sc_vector_insert(&vec, 1, 100);
|
||||
assert(ok);
|
||||
assert(vec.size == 3);
|
||||
assert(vec.data[0] == 42);
|
||||
assert(vec.data[1] == 100);
|
||||
assert(vec.data[2] == 37);
|
||||
|
||||
ok = sc_vector_push(&vec, 77);
|
||||
assert(ok);
|
||||
assert(vec.size == 4);
|
||||
assert(vec.data[0] == 42);
|
||||
assert(vec.data[1] == 100);
|
||||
assert(vec.data[2] == 37);
|
||||
assert(vec.data[3] == 77);
|
||||
|
||||
sc_vector_remove(&vec, 1);
|
||||
assert(vec.size == 3);
|
||||
assert(vec.data[0] == 42);
|
||||
assert(vec.data[1] == 37);
|
||||
assert(vec.data[2] == 77);
|
||||
|
||||
sc_vector_clear(&vec);
|
||||
assert(vec.size == 0);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_push_array(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
bool ok;
|
||||
|
||||
ok = sc_vector_push(&vec, 3); assert(ok);
|
||||
ok = sc_vector_push(&vec, 14); assert(ok);
|
||||
ok = sc_vector_push(&vec, 15); assert(ok);
|
||||
ok = sc_vector_push(&vec, 92); assert(ok);
|
||||
ok = sc_vector_push(&vec, 65); assert(ok);
|
||||
assert(vec.size == 5);
|
||||
|
||||
int items[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
|
||||
ok = sc_vector_push_all(&vec, items, 8);
|
||||
|
||||
assert(ok);
|
||||
assert(vec.size == 13);
|
||||
assert(vec.data[0] == 3);
|
||||
assert(vec.data[1] == 14);
|
||||
assert(vec.data[2] == 15);
|
||||
assert(vec.data[3] == 92);
|
||||
assert(vec.data[4] == 65);
|
||||
assert(vec.data[5] == 1);
|
||||
assert(vec.data[6] == 2);
|
||||
assert(vec.data[7] == 3);
|
||||
assert(vec.data[8] == 4);
|
||||
assert(vec.data[9] == 5);
|
||||
assert(vec.data[10] == 6);
|
||||
assert(vec.data[11] == 7);
|
||||
assert(vec.data[12] == 8);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_insert_array(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
bool ok;
|
||||
|
||||
ok = sc_vector_push(&vec, 3); assert(ok);
|
||||
ok = sc_vector_push(&vec, 14); assert(ok);
|
||||
ok = sc_vector_push(&vec, 15); assert(ok);
|
||||
ok = sc_vector_push(&vec, 92); assert(ok);
|
||||
ok = sc_vector_push(&vec, 65); assert(ok);
|
||||
assert(vec.size == 5);
|
||||
|
||||
int items[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
|
||||
ok = sc_vector_insert_all(&vec, 3, items, 8);
|
||||
assert(ok);
|
||||
assert(vec.size == 13);
|
||||
assert(vec.data[0] == 3);
|
||||
assert(vec.data[1] == 14);
|
||||
assert(vec.data[2] == 15);
|
||||
assert(vec.data[3] == 1);
|
||||
assert(vec.data[4] == 2);
|
||||
assert(vec.data[5] == 3);
|
||||
assert(vec.data[6] == 4);
|
||||
assert(vec.data[7] == 5);
|
||||
assert(vec.data[8] == 6);
|
||||
assert(vec.data[9] == 7);
|
||||
assert(vec.data[10] == 8);
|
||||
assert(vec.data[11] == 92);
|
||||
assert(vec.data[12] == 65);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_remove_slice(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
bool ok;
|
||||
|
||||
for (int i = 0; i < 100; ++i)
|
||||
{
|
||||
ok = sc_vector_push(&vec, i);
|
||||
assert(ok);
|
||||
}
|
||||
|
||||
assert(vec.size == 100);
|
||||
|
||||
sc_vector_remove_slice(&vec, 32, 60);
|
||||
assert(vec.size == 40);
|
||||
assert(vec.data[31] == 31);
|
||||
assert(vec.data[32] == 92);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_swap_remove(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
bool ok;
|
||||
|
||||
ok = sc_vector_push(&vec, 3); assert(ok);
|
||||
ok = sc_vector_push(&vec, 14); assert(ok);
|
||||
ok = sc_vector_push(&vec, 15); assert(ok);
|
||||
ok = sc_vector_push(&vec, 92); assert(ok);
|
||||
ok = sc_vector_push(&vec, 65); assert(ok);
|
||||
assert(vec.size == 5);
|
||||
|
||||
sc_vector_swap_remove(&vec, 1);
|
||||
assert(vec.size == 4);
|
||||
assert(vec.data[0] == 3);
|
||||
assert(vec.data[1] == 65);
|
||||
assert(vec.data[2] == 15);
|
||||
assert(vec.data[3] == 92);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_index_of(void) {
|
||||
struct SC_VECTOR(int) vec;
|
||||
sc_vector_init(&vec);
|
||||
|
||||
bool ok;
|
||||
|
||||
for (int i = 0; i < 10; ++i)
|
||||
{
|
||||
ok = sc_vector_push(&vec, i);
|
||||
assert(ok);
|
||||
}
|
||||
|
||||
ssize_t idx;
|
||||
|
||||
idx = sc_vector_index_of(&vec, 0);
|
||||
assert(idx == 0);
|
||||
|
||||
idx = sc_vector_index_of(&vec, 1);
|
||||
assert(idx == 1);
|
||||
|
||||
idx = sc_vector_index_of(&vec, 4);
|
||||
assert(idx == 4);
|
||||
|
||||
idx = sc_vector_index_of(&vec, 9);
|
||||
assert(idx == 9);
|
||||
|
||||
idx = sc_vector_index_of(&vec, 12);
|
||||
assert(idx == -1);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_grow() {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
bool ok;
|
||||
|
||||
for (int i = 0; i < 50; ++i)
|
||||
{
|
||||
ok = sc_vector_push(&vec, i); /* append */
|
||||
assert(ok);
|
||||
}
|
||||
|
||||
assert(vec.cap >= 50);
|
||||
assert(vec.size == 50);
|
||||
|
||||
for (int i = 0; i < 25; ++i)
|
||||
{
|
||||
ok = sc_vector_insert(&vec, 20, i); /* insert in the middle */
|
||||
assert(ok);
|
||||
}
|
||||
|
||||
assert(vec.cap >= 75);
|
||||
assert(vec.size == 75);
|
||||
|
||||
for (int i = 0; i < 25; ++i)
|
||||
{
|
||||
ok = sc_vector_insert(&vec, 0, i); /* prepend */
|
||||
assert(ok);
|
||||
}
|
||||
|
||||
assert(vec.cap >= 100);
|
||||
assert(vec.size == 100);
|
||||
|
||||
for (int i = 0; i < 50; ++i)
|
||||
sc_vector_remove(&vec, 20); /* remove from the middle */
|
||||
|
||||
assert(vec.cap >= 50);
|
||||
assert(vec.size == 50);
|
||||
|
||||
for (int i = 0; i < 25; ++i)
|
||||
sc_vector_remove(&vec, 0); /* remove from the head */
|
||||
|
||||
assert(vec.cap >= 25);
|
||||
assert(vec.size == 25);
|
||||
|
||||
for (int i = 24; i >=0; --i)
|
||||
sc_vector_remove(&vec, i); /* remove from the tail */
|
||||
|
||||
assert(vec.size == 0);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_exp_growth(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
size_t oldcap = vec.cap;
|
||||
int realloc_count = 0;
|
||||
bool ok;
|
||||
for (int i = 0; i < 10000; ++i)
|
||||
{
|
||||
ok = sc_vector_push(&vec, i);
|
||||
assert(ok);
|
||||
if (vec.cap != oldcap)
|
||||
{
|
||||
realloc_count++;
|
||||
oldcap = vec.cap;
|
||||
}
|
||||
}
|
||||
|
||||
/* Test speciically for an expected growth factor of 1.5. In practice, the
|
||||
* result is even lower (19) due to the first alloc of size 10 */
|
||||
assert(realloc_count <= 23); /* ln(10000) / ln(1.5) ~= 23 */
|
||||
|
||||
realloc_count = 0;
|
||||
for (int i = 9999; i >= 0; --i)
|
||||
{
|
||||
sc_vector_remove(&vec, i);
|
||||
if (vec.cap != oldcap)
|
||||
{
|
||||
realloc_count++;
|
||||
oldcap = vec.cap;
|
||||
}
|
||||
}
|
||||
|
||||
assert(realloc_count <= 23); /* same expectations for removals */
|
||||
assert(realloc_count > 0); /* sc_vector_remove() must autoshrink */
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_reserve(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
bool ok;
|
||||
|
||||
ok = sc_vector_reserve(&vec, 800);
|
||||
assert(ok);
|
||||
assert(vec.cap >= 800);
|
||||
assert(vec.size == 0);
|
||||
|
||||
size_t initial_cap = vec.cap;
|
||||
|
||||
for (int i = 0; i < 800; ++i)
|
||||
{
|
||||
ok = sc_vector_push(&vec, i);
|
||||
assert(ok);
|
||||
assert(vec.cap == initial_cap); /* no realloc */
|
||||
}
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_shrink_to_fit(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
bool ok;
|
||||
|
||||
ok = sc_vector_reserve(&vec, 800);
|
||||
assert(ok);
|
||||
for (int i = 0; i < 250; ++i)
|
||||
{
|
||||
ok = sc_vector_push(&vec, i);
|
||||
assert(ok);
|
||||
}
|
||||
|
||||
assert(vec.cap >= 800);
|
||||
assert(vec.size == 250);
|
||||
|
||||
sc_vector_shrink_to_fit(&vec);
|
||||
assert(vec.cap == 250);
|
||||
assert(vec.size == 250);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_move(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
for (int i = 0; i < 7; ++i)
|
||||
{
|
||||
bool ok = sc_vector_push(&vec, i);
|
||||
assert(ok);
|
||||
}
|
||||
|
||||
/* move item at 1 so that its new position is 4 */
|
||||
sc_vector_move(&vec, 1, 4);
|
||||
|
||||
assert(vec.size == 7);
|
||||
assert(vec.data[0] == 0);
|
||||
assert(vec.data[1] == 2);
|
||||
assert(vec.data[2] == 3);
|
||||
assert(vec.data[3] == 4);
|
||||
assert(vec.data[4] == 1);
|
||||
assert(vec.data[5] == 5);
|
||||
assert(vec.data[6] == 6);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_move_slice_forward(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
for (int i = 0; i < 10; ++i)
|
||||
{
|
||||
bool ok = sc_vector_push(&vec, i);
|
||||
assert(ok);
|
||||
}
|
||||
|
||||
/* move slice {2, 3, 4, 5} so that its new position is 5 */
|
||||
sc_vector_move_slice(&vec, 2, 4, 5);
|
||||
|
||||
assert(vec.size == 10);
|
||||
assert(vec.data[0] == 0);
|
||||
assert(vec.data[1] == 1);
|
||||
assert(vec.data[2] == 6);
|
||||
assert(vec.data[3] == 7);
|
||||
assert(vec.data[4] == 8);
|
||||
assert(vec.data[5] == 2);
|
||||
assert(vec.data[6] == 3);
|
||||
assert(vec.data[7] == 4);
|
||||
assert(vec.data[8] == 5);
|
||||
assert(vec.data[9] == 9);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
static void test_vector_move_slice_backward(void) {
|
||||
struct SC_VECTOR(int) vec = SC_VECTOR_INITIALIZER;
|
||||
|
||||
for (int i = 0; i < 10; ++i)
|
||||
{
|
||||
bool ok = sc_vector_push(&vec, i);
|
||||
assert(ok);
|
||||
}
|
||||
|
||||
/* move slice {5, 6, 7} so that its new position is 2 */
|
||||
sc_vector_move_slice(&vec, 5, 3, 2);
|
||||
|
||||
assert(vec.size == 10);
|
||||
assert(vec.data[0] == 0);
|
||||
assert(vec.data[1] == 1);
|
||||
assert(vec.data[2] == 5);
|
||||
assert(vec.data[3] == 6);
|
||||
assert(vec.data[4] == 7);
|
||||
assert(vec.data[5] == 2);
|
||||
assert(vec.data[6] == 3);
|
||||
assert(vec.data[7] == 4);
|
||||
assert(vec.data[8] == 8);
|
||||
assert(vec.data[9] == 9);
|
||||
|
||||
sc_vector_destroy(&vec);
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
(void) argc;
|
||||
(void) argv;
|
||||
|
||||
test_vector_insert_remove();
|
||||
test_vector_push_array();
|
||||
test_vector_insert_array();
|
||||
test_vector_remove_slice();
|
||||
test_vector_swap_remove();
|
||||
test_vector_move();
|
||||
test_vector_move_slice_forward();
|
||||
test_vector_move_slice_backward();
|
||||
test_vector_index_of();
|
||||
test_vector_grow();
|
||||
test_vector_exp_growth();
|
||||
test_vector_reserve();
|
||||
test_vector_shrink_to_fit();
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in a new issue