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This commit is contained in:
Alessandro Mauri 2023-02-16 23:33:19 +01:00
parent 9136eaa54f
commit 805f633af0
5 changed files with 123 additions and 4 deletions
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61
text_rendering/stack.h Normal file
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#ifdef _STACK_TYPE
#ifdef _STACK_NAME
#ifndef _STACK_REALLOC
#define _STACK_REALLOC(p, s) realloc(p,s)
#endif
#ifndef _STACK_MEMSET
#define _STACK_MEMSET(p, c, s) memset(p,c,s)
#endif
#ifndef _STACK_STEP
#define _STACK_STEP 8
#endif
#ifndef _STACK_CAT
#define _STACK_CAT_I(a,b) a ## b
#define _STACK_CAT(a,b) _STACK_CAT_I(a,b)
#endif
// TODO: add a rolling hash
struct _STACK_NAME {
_STACK_TYPE *items;
int size, idx;
};
int _STACK_CAT(stack_grow_,_STACK_NAME)(struct _STACK_NAME *stack, int step)
{
if (!stack)
return -1;
stack->items = _STACK_REALLOC(stack->items, (stack->size+step)*sizeof(_STACK_TYPE));
if(!stack->items)
return -1;
_STACK_MEMSET(&(stack->items[stack->size]), 0, step*sizeof(*(stack->items)));
stack->size += step;
return 0;
}
int _STACK_CAT(stack_push_,_STACK_NAME)(struct _STACK_NAME *stack, _STACK_TYPE *e)
{
if (!stack || !e)
return -1;
if (stack->idx >= stack->size)
if (_STACK_CAT(stack_grow_,_STACK_NAME)(stack, _STACK_STEP))
return -1;
stack->items[stack->idx++] = *e;
return 0;
}
int _STACK_CAT(stack_clear_,_STACK_NAME)(struct _STACK_NAME *stack)
{
if (!stack)
return -1;
stack->idx = 0;
}
#endif
#endif