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#include <string.h>
#include "filelist.h"
alpm_list_t *_alpm_filelist_operation(alpm_filelist_t *filesA,
alpm_filelist_t *filesB, enum filelist_op operation)
{
alpm_list_t *ret = NULL;
size_t ctrA = 0, ctrB = 0;
while(ctrA < filesA->count && ctrB < filesB->count) {
alpm_file_t *fileA = filesA->files + ctrA;
alpm_file_t *fileB = filesB->files + ctrB;
const char *strA = fileA->name;
const char *strB = fileB->name;
if(strA[strlen(strA)-1] == '/') {
ctrA++;
} else if(strB[strlen(strB)-1] == '/') {
ctrB++;
} else {
int cmp = strcmp(strA, strB);
if(cmp < 0) {
if(operation == DIFFERENCE) {
ret = alpm_list_add(ret, fileA);
}
ctrA++;
} else if(cmp > 0) {
ctrB++;
} else {
if(operation == INTERSECT) {
ret = alpm_list_add(ret, fileA);
}
ctrA++;
ctrB++;
}
}
}
while(operation == DIFFERENCE && ctrA < filesA->count) {
alpm_file_t *fileA = filesA->files + ctrA;
const char *strA = fileA->name;
if(strA[strlen(strA)-1] != '/') {
ret = alpm_list_add(ret, fileA);
}
ctrA++;
}
return ret;
}
int _alpm_files_cmp(const void *f1, const void *f2)
{
const alpm_file_t *file1 = f1;
const alpm_file_t *file2 = f2;
return strcmp(file1->name, file2->name);
}
alpm_file_t *alpm_filelist_contains(alpm_filelist_t *filelist,
const char *path)
{
alpm_file_t key;
if(!filelist) {
return NULL;
}
key.name = (char *)path;
return bsearch(&key, filelist->files, filelist->count,
sizeof(alpm_file_t), _alpm_files_cmp);
}
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