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/* Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0 */
/* For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt */
#include "util.h"
#include "datastack.h"
#define STACK_DELTA 20
int
DataStack_init(Stats *pstats, DataStack *pdata_stack)
{
pdata_stack->depth = -1;
pdata_stack->stack = NULL;
pdata_stack->alloc = 0;
return RET_OK;
}
void
DataStack_dealloc(Stats *pstats, DataStack *pdata_stack)
{
int i;
for (i = 0; i < pdata_stack->alloc; i++) {
Py_XDECREF(pdata_stack->stack[i].file_data);
}
PyMem_Free(pdata_stack->stack);
}
int
DataStack_traverse(DataStack *pdata_stack, visitproc visit, void *arg)
{
int i;
for (i = 0; i < pdata_stack->alloc; i++) {
Py_VISIT(pdata_stack->stack[i].file_data);
}
return 0;
}
void
DataStack_clear(DataStack *pdata_stack)
{
int i;
for (i = 0; i < pdata_stack->alloc; i++) {
Py_CLEAR(pdata_stack->stack[i].file_data);
}
}
int
DataStack_grow(Stats *pstats, DataStack *pdata_stack)
{
pdata_stack->depth++;
if (pdata_stack->depth >= pdata_stack->alloc) {
/* We've outgrown our data_stack array: make it bigger. */
int bigger = pdata_stack->alloc + STACK_DELTA;
DataStackEntry * bigger_data_stack = PyMem_Realloc(pdata_stack->stack, bigger * sizeof(DataStackEntry));
STATS( pstats->stack_reallocs++; )
if (bigger_data_stack == NULL) {
PyErr_NoMemory();
pdata_stack->depth--;
return RET_ERROR;
}
/* Zero the new entries. */
memset(bigger_data_stack + pdata_stack->alloc, 0, STACK_DELTA * sizeof(DataStackEntry));
pdata_stack->stack = bigger_data_stack;
pdata_stack->alloc = bigger;
}
return RET_OK;
}
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