#include “util.h”
#include
#include
#include
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char* join_string(char *str1, char *str2, size_t *size) {
assert(str1!=NULL && str2!=NULL);
char *ret = (char *) malloc(strlen(str1) + strlen(str2) + 1), *p = ret;
for(; (*p=*str1); p++, str1++);
for(; (*p=*str2); p++, str2++);
if(size != NULL) *size = (p-ret)*sizeof(char);
return ret;
char* join_path(char *path, char *subpath, size_t *size) {
assert(path!=NULL && subpath!=NULL);
int path_len = strlen(path), subpath_len = strlen(subpath);
char *fullpath = (char *) malloc(path_len+subpath_len+2), *p = fullpath;
char prev = ‘\0′;
for(; *path; path++) {
if(*path==prev && prev==’/’) continue;
*p = *path;
prev = *path;
if(prev!=’/’) {
*p++ = ‘/’;
prev = ‘/’;
for(; *subpath; subpath++) {
if(*subpath==prev && prev==’/’) continue;
*p = *subpath;
prev = *subpath;
*p = ‘\0’;
if(size!=NULL) *size = (p-fullpath)*sizeof(char);
return fullpath;
char* get_parent_name(char *dir_name) {
size_t size;
char *fullpath = join_path(dir_name, “/”, &size);
if(size <= 1) return fullpath;
char *p = fullpath+size-2;
while(p!=fullpath && *p!='/') p--;
*p++ = '/';
*p = '\0';
return fullpath;
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