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path.c
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path.c
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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "path.h"
static int seplen = 2;
static const char sep[] = {0xc3, 0xbf};
int
sepcmp(const char *str, size_t len) {
if (len < seplen)
return -1;
return strncmp(str, &(sep[0]), seplen);
}
/*
* /foo/bar -> .foo.bar
*/
char *
path_to_key(const char *path, size_t *klen, char appendsep) {
char *key, *k;
size_t plen;
int i;
plen = strlen(path);
appendsep = appendsep && path[plen-1] != '/';
for (i = 0, *klen = 0; i < plen; i++) {
if (path[i] == '/')
(*klen) += seplen;
else
(*klen)++;
}
if (appendsep)
(*klen) += seplen;
key = malloc(*klen);
for (i = 0, k = key; i < plen; ++i) {
if (path[i] == '/') {
strncpy(k, &(sep[0]), seplen);
k += seplen;
} else {
*k = path[i];
k++;
}
}
if (appendsep)
strncpy(k, &(sep[0]), seplen);
return key;
}
/*
* .foo.bar -> /foo/bar
*/
char *
key_to_path(const char *key, size_t klen) {
char *path, *p;
const char *k;
path = malloc(klen);
for (k = key, p = path; k < key+klen; ++p) {
printf("%x ", *k);
if (strncmp(k, &(sep[0]), seplen) == 0) {
*p = '/';
k += seplen;
} else {
*p = *k;
k++;
}
}
printf("\n");
fflush(stdout);
*p = '\0';
printf("path: %s\n", path);
return path;
}
const char *
path_diff(const char *base_path, const char *path) {
size_t base_path_len, path_len;
base_path_len = strlen(base_path);
path_len = strlen(path);
if (base_path_len > path_len)
return NULL;
if (strncmp(base_path, path, base_path_len) != 0)
return NULL;
path += base_path_len;
if (*path == '/') path++;
return path;
}
char *
dirname(const char *path) {
char *dirname, *p;
size_t len;
p = strrchr(path, '/');
if (!p) {
len = 1;
path = ".";
} else if (p == path) {
len = 1;
path = "/";
} else {
len = p - path;
}
dirname = malloc(len+1);
strncpy(dirname, path, len);
dirname[len] = '\0';
return dirname;
}
char *
basename(const char *path) {
const char *p;
p = strrchr(path, '/');
if (!p)
p = path;
else
p++;
return strdup(p);
}