ccan/tools/ccan_dir.c at master · saminigod/ccan

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#include <ccan/err/err.h&g 52F6 t;

#include <ccan/tal/path/path.h>

#include "tools.h"

#include <assert.h>

#include <string.h>

#include <stdlib.h>

/* Walk up to find /ccan/ => ccan directory. */

static unsigned int ccan_dir_prefix(const char *fulldir)

{

unsigned int i;

assert(fulldir[0] == '/');

for (i = strlen(fulldir) - 1; i > 0; i--) {

if (strncmp(fulldir+i, "/ccan", 5) != 0)

continue;

if (fulldir[i+5] != '\0' && fulldir[i+5] != '/')

continue;

return i + 1;

}

return 0;

}

const char *find_ccan_dir(const char *base)

{

static char *ccan_dir;

if (!ccan_dir) {

if (base[0] != '/') {

const char *tmpctx = path_cwd(NULL);

find_ccan_dir(path_join(tmpctx, tmpctx, base));

tal_free(tmpctx);

} else {

unsigned int prefix = ccan_dir_prefix(base);

if (prefix)

ccan_dir = tal_strndup(NULL, base, prefix);

}

return ccan_dir;

}