aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorMattias Andrée <maandree@operamail.com>2015-12-03 07:38:11 +0100
committerMattias Andrée <maandree@operamail.com>2015-12-03 07:38:11 +0100
commit5760d146f745cf4066aee4b3ae243ca83fb94840 (patch)
tree98af3502b6eb8ee139442b3f8dd9c8327e243d6f
parentfuture directions (diff)
downloadlibrarian-5760d146f745cf4066aee4b3ae243ca83fb94840.tar.gz
librarian-5760d146f745cf4066aee4b3ae243ca83fb94840.tar.bz2
librarian-5760d146f745cf4066aee4b3ae243ca83fb94840.tar.xz
find files
Signed-off-by: Mattias Andrée <maandree@operamail.com>
-rw-r--r--src/librarian.c148
1 files changed, 134 insertions, 14 deletions
diff --git a/src/librarian.c b/src/librarian.c
index c33011f..5ee0970 100644
--- a/src/librarian.c
+++ b/src/librarian.c
@@ -87,6 +87,23 @@ static const char *argv0;
/**
+ * Compares the name of two libraries.
+ *
+ * @param a:const struct library * One of the libraries.
+ * @param b:const struct library * The other library.
+ * @return <0: `a` < `b`.
+ * =0: `a` = `b`.
+ * >0: `a` > `b`.
+ */
+static int library_name_cmp(const void *a, const void *b)
+{
+ const struct library *la = a;
+ const struct library *lb = b;
+ return strcmp(la->name, lb->name);
+}
+
+
+/**
* Determine whether a string is the
* name of a non-reserved variable.
*
@@ -300,7 +317,7 @@ static char *locate_in_dir(struct library *lib, char *path, int oldest)
DIR *d = NULL;
struct dirent *f;
char *p;
- char *old;
+ char *old = NULL;
char *best = NULL;
char *best_ver;
int r, saved_errno;
@@ -415,6 +432,88 @@ fail:
/**
+ * Find librarian files for all libraries.
+ *
+ * @param libraries The sought libraries.
+ * @param n The number of elements in `libraries`.
+ * @param path LIBRARIAN_PATH.
+ * @param oldest Are older versions prefered?
+ * @return `NULL`-terminated list of librarian files.
+ * `NULL` if all where not found, or on error,
+ * on failure to find librarian files, `errno`
+ * is set to 0.
+ */
+static char **find_librarian_files(struct library *libraries, size_t n, char *path, int oldest)
+{
+ size_t i;
+ char *best = NULL;
+ char *found;
+ char *best_ver;
+ char *found_ver;
+ const char *last = NULL;
+ char **rc = NULL;
+ size_t ptr = 0;
+ int r, saved_errno;
+
+ qsort(libraries, n, sizeof(*libraries), library_name_cmp);
+ rc = malloc((n + 1) * sizeof(*rc));
+ t (rc == NULL);
+
+ for (i = 0; i < n; i++) {
+ /* TODO skip dependees */
+ found = locate(libraries + i, path, oldest);
+ t (!found && errno);
+ if (found == NULL) {
+ if (i + 1 == n)
+ goto not_found;
+ if (strcmp(libraries[i].name, libraries[i + 1].name))
+ goto not_found;
+ continue;
+ }
+ if (last && !strcmp(libraries[i].name, last)) {
+ best_ver = strrchr(best, '=');
+ found_ver = strrchr(found, '=');
+ assert(best_ver && !strchr(best_ver, '/'));
+ assert(found_ver && !strchr(found_ver, '/'));
+ r = version_cmp(found + 1, best_ver + 1);
+ if (oldest ? (r < 0) : (r > 0)) {
+ free(best);
+ rc[ptr - 1] = best = found;
+ }
+ } else {
+ rc[ptr++] = best = found;
+ }
+ last = libraries[i].name;
+ }
+
+ rc[ptr++] = NULL;
+ return rc;
+
+not_found:
+ if (libraries[0].upper == libraries[0].lower) {
+ fprintf(stderr, "%s: cannot find library: %s%s%s", argv0,
+ libraries[0].name, libraries[0].upper ? "=" : "",
+ libraries[0].upper);
+ } else {
+ fprintf(stderr, "%s: cannot find library: %s%s%s%s%s%s%s", argv0,
+ libraries[0].name,
+ libraries[0].lower ? ">" : "", libraries[0].lower_closed ? "=" : "",
+ libraries[0].lower ? libraries[0].lower : "",
+ libraries[0].upper ? "<" : "", libraries[0].upper_closed ? "=" : "",
+ libraries[0].upper ? libraries[0].upper : "");
+ }
+ errno = 0;
+fail:
+ saved_errno = errno;
+ while (ptr--)
+ free(rc[ptr--]);
+ free(rc);
+ errno = saved_errno;
+ return NULL;
+}
+
+
+/**
* @return 0: Program was successful.
* 1: An error occurred.
* 2: A library was not found.
@@ -422,10 +521,6 @@ fail:
*/
int main(int argc, char *argv[])
{
-#define CLEANUP \
- free(libraries), \
- free(path)
-
int dashed = 0, f_deps = 0, f_locate = 0, f_oldest = 0;
char *arg;
char **args = argv;
@@ -436,6 +531,9 @@ int main(int argc, char *argv[])
struct library *libraries_last;
const char *path_;
char *path = NULL;
+ char **files = NULL;
+ char **file;
+ int rc;
/* Parse arguments. */
argv0 = argv ? (argc--, *argv++) : "pp";
@@ -485,19 +583,41 @@ int main(int argc, char *argv[])
path = strdup(path_);
t (path == NULL);
- CLEANUP;
- return 0;
+ /* Find librarian files. */
+ files = find_librarian_files(libraries, (size_t)(libraries_last - libraries), path, f_oldest);
+ if (files == NULL) {
+ t (errno);
+ goto not_found;
+ }
+ if (f_locate) {
+ for (file = files; *file; file++)
+ t (printf("%s\n", *file) < 0);
+ goto done;
+ }
+
+ /* TODO */
+done:
+ rc = 0;
+ goto cleanup;
fail:
perror(argv0);
- CLEANUP;
- return 1;
-
+ rc = 1;
+ goto cleanup;
+not_found:
+ rc = 2;
+ goto cleanup;
usage:
fprintf(stderr, "%s: Invalid arguments, see `man 1 librarian'.\n", argv0);
- CLEANUP;
- return 3;
-
-#undef CLEANUP
+ rc = 3;
+ goto cleanup;
+cleanup:
+ if ((file = files))
+ for (; *file; file++)
+ free(*file);
+ free(files);
+ free(libraries);
+ free(path);
+ return rc;
}