99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
#include <string.h>
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#include "labellist.h"
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typedef struct LabelInfo LabelInfo;
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struct LabelInfo {
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const char *name;
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size_t name_len;
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Promise *promise;
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LabelInfo *next;
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};
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struct LabelList {
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BPAlloc *alloc;
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LabelInfo *head;
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};
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LabelList *LabelList_New(BPAlloc *alloc)
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{
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LabelList *list = BPAlloc_Malloc(alloc, sizeof(LabelList));
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if(list != NULL) {
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list->head = NULL;
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list->alloc = alloc;
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}
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return list;
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}
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void LabelList_Free(LabelList *list)
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{
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LabelInfo *info = list->head;
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while(info != NULL) {
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Promise_Free(info->promise);
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info = info->next;
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}
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list->head = NULL;
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}
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bool LabelList_SetLabel(LabelList *list, const char *name, size_t name_len, long long int value)
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{
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Promise *promise = LabelList_GetLabel(list, name, name_len);
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if(promise == NULL)
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return false;
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Promise_Resolve(promise, &value, sizeof(value));
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return true;
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}
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Promise *LabelList_GetLabel(LabelList *list, const char *name, size_t name_len)
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{
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// Find the label with the given name.
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{
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LabelInfo *info = list->head;
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while(info != NULL) {
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if(name_len == info->name_len
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&& strncmp(name, info->name, name_len) == 0)
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return info->promise;
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info = info->next;
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}
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}
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// No such label. Create a new one.
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LabelInfo *new_info;
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{
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BPAlloc *alloc = list->alloc;
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Promise *promise = Promise_New(alloc, sizeof(long long int));
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if(promise == NULL)\
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return NULL;
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new_info = BPAlloc_Malloc(alloc, sizeof(LabelInfo));
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if(new_info == NULL) {
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Promise_Free(promise);
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return NULL;
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}
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new_info->next = NULL;
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new_info->name = name;
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new_info->name_len = name_len;
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new_info->promise = promise;
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}
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// Add it to the list
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new_info->next = list->head;
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list->head = new_info;
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return new_info->promise;
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}
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size_t LabelList_GetUnresolvedCount(LabelList *list)
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{
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size_t count = 0;
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LabelInfo *info = list->head;
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while(info != NULL) {
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count += !Promise_hasResolved(info->promise);
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info = info->next;
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}
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return count;
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} |