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Stack iterator

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Leonardo committed 2019-03-22 23:03:02 -03:00
1 parent 21c4fd836d
commit 533366348d
3 files changed
+127 -11
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src/stack.h
+62 -7
View File
@@ -50,6 +50,8 @@
{ \
struct SNAME##_s *target; \
size_t cursor; \
bool start; \
bool end; \
}; \
\
/* HEADER ********************************************************************/
@@ -71,7 +73,12 @@
FMOD size_t PFX##_capacity(SNAME *_stack_); \
\
FMOD void PFX##_iter(SNAME##_iter *iter, SNAME *target); \
FMOD bool PFX##_iter_start(SNAME##_iter *iter); \
FMOD bool PFX##_iter_end(SNAME##_iter *iter); \
FMOD void PFX##_iter_tostart(SNAME##_iter *iter); \
FMOD void PFX##_iter_toend(SNAME##_iter *iter); \
FMOD bool PFX##_iter_next(SNAME##_iter *iter, T *result, size_t *index); \
FMOD bool PFX##_iter_prev(SNAME##_iter *iter, T *result, size_t *index); \
\
/* SOURCE ********************************************************************/
#define STACK_GENERATE_SOURCE(PFX, SNAME, FMOD, K, T) \
@@ -198,19 +205,67 @@
FMOD void PFX##_iter(SNAME##_iter *iter, SNAME *target) \
{ \
iter->target = target; \
iter->cursor = iter->target->count - 1; \
iter->start = true; \
iter->end = false; \
} \
\
FMOD bool PFX##_iter_start(SNAME##_iter *iter) \
{ \
return iter->cursor == iter->target->count - 1 && iter->start; \
} \
\
FMOD bool PFX##_iter_end(SNAME##_iter *iter) \
{ \
return iter->cursor == 0 && iter->end; \
} \
\
FMOD void PFX##_iter_tostart(SNAME##_iter *iter) \
{ \
iter->cursor = iter->target->count - 1; \
iter->start = true; \
iter->end = false; \
} \
\
FMOD void PFX##_iter_toend(SNAME##_iter *iter) \
{ \
iter->cursor = 0; \
iter->start = false; \
iter->end = true; \
} \
\
FMOD bool PFX##_iter_next(SNAME##_iter *iter, T *result, size_t *index) \
{ \
if (iter->cursor < iter->target->count) \
{ \
*index = iter->cursor; \
*result = iter->target->buffer[iter->cursor++]; \
return true; \
} \
if (iter->end) \
return false; \
\
return false; \
*index = iter->cursor; \
*result = iter->target->buffer[iter->cursor]; \
iter->start = false; \
\
if (iter->cursor == 0) \
iter->end = true; \
else \
iter->cursor--; \
\
return true; \
} \
\
FMOD bool PFX##_iter_prev(SNAME##_iter *iter, T *result, size_t *index) \
{ \
if (iter->start) \
return false; \
\
*index = iter->cursor; \
*result = iter->target->buffer[iter->cursor]; \
iter->end = false; \
\
if (iter->cursor == iter->target->count - 1) \
iter->start = true; \
else \
iter->cursor++; \
\
return true; \
}
#endif /* CMC_STACK_H */