Separate libs6rcrepo

1 files changed, 66 insertions, 0 deletions

diff --git a/src/repo/s6rc_repo_makesvlist.c b/src/repo/s6rc_repo_makesvlist.c
new file mode 100644
index 0000000..99a174e
--- /dev/null
+++ b/src/repo/s6rc_repo_makesvlist.c
@@ -0,0 +1,66 @@
+/* ISC license. */
+
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <skalibs/posixplz.h>
+#include <skalibs/direntry.h>
+#include <skalibs/strerr.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/genalloc.h>
+
+#include <s6-rc/repo.h>
+
+static inline int s6rc_repo_addsub (char const *sub, uint8_t i, stralloc *sa, genalloc *ga)
+{
+  DIR *dir = opendir(sub) ;
+  if (!dir) { strerr_warnfu2sys("opendir ", sub) ; return 0 ; }
+  for (;;)
+  {
+    s6rc_repo_sv sv = { .pos = sa->len, .sub = i } ;
+    direntry *d ;
+    errno = 0 ;
+    d = readdir(dir) ;
+    if (!d) break ;
+    if (d->d_name[0] == '.') continue ;
+
+    if (!stralloc_cats(sa, d->d_name) || !stralloc_0(sa)
+     || !genalloc_append(s6rc_repo_sv, ga, &sv)) goto nomem ;
+  }
+  dir_close(dir) ;
+  if (errno) { strerr_warnfu2sys("readdir ", sub) ; return 0 ; }
+  return 1 ;
+
+ nomem:
+  strerr_warnfu1sys("stralloc_catb") ;
+  return 0 ;
+}
+
+int s6rc_repo_makesvlist (char const *repo, char const *set, stralloc *sa, genalloc *ga, uint32_t *tab)
+{
+  size_t repolen = strlen(repo) ;
+  size_t setlen = strlen(set) ;
+  size_t sabase = sa->len ;
+  size_t gabase = genalloc_len(s6rc_repo_sv, ga) ;
+  int sawasnull = !sa->s ;
+  int gawasnull = !genalloc_s(s6rc_repo_sv, ga) ;
+  char subfn[repolen + setlen + 17] ;
+
+  memcpy(subfn, repo, repolen) ;
+  memcpy(subfn + repolen, "/sources/", 9) ;
+  memcpy(subfn + repolen + 9, set, setlen) ;
+  subfn[repolen + 9 + setlen] = '/' ;
+  for (uint8_t i = 0 ; i < 4 ; i++)
+  {
+    if (tab) tab[i] = genalloc_len(s6rc_repo_sv, ga) ;
+    memcpy(subfn + repolen + setlen + 10, s6rc_repo_subnames[i], 7) ;
+    if (!s6rc_repo_addsub(subfn, i, sa, ga)) goto err ;
+  }
+  return 1 ;
+
+ err:
+  if (sawasnull) stralloc_free(sa) ; else sa->len = sabase ;
+  if (gawasnull) genalloc_free(s6rc_repo_sv, ga) ; else genalloc_setlen(s6rc_repo_sv, ga, gabase) ;
+  return 0 ;
+}