skalibs

commit 6bae0b3d69c7968586afc73827b5844c6a23873f
parent 4684272897e351ed21f82a0ef84bc94194b4d538
Author: Laurent Bercot <ska-skaware@skarnet.org>
Date:   Fri, 16 Mar 2018 12:31:17 +0000

 Add genqdyn_unpush, bufalloc_unput

Diffstat:
M
src/include/skalibs/bufalloc.h
 | 
1
+
M
src/include/skalibs/genqdyn.h
 | 
1
+
A
src/libdatastruct/genqdyn_unpush.c
 | 
12
++++++++++++

3 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/src/include/skalibs/bufalloc.h b/src/include/skalibs/bufalloc.h
@@ -24,6 +24,7 @@ extern void bufalloc_init (bufalloc *, ssize_t (*)(int, char const *, size_t), i
 #define bufalloc_put(ba, s, n) stralloc_catb(&(ba)->x, s, n)
 #define bufalloc_puts(ba, s) stralloc_cats(&(ba)->x, s)
 #define bufalloc_putv(ba, v, n) stralloc_catv(&(ba)->x, v, n)
+#define bufalloc_unput(ba, n) ((ba)->x.len -= (n))
 #define bufalloc_fd(ba) ((ba)->fd)
 extern int bufalloc_getfd (bufalloc const *) gccattr_pure ;
 extern int bufalloc_flush (bufalloc *) ;
diff --git a/src/include/skalibs/genqdyn.h b/src/include/skalibs/genqdyn.h
@@ -26,6 +26,7 @@ extern void genqdyn_init (genqdyn *, size_t, unsigned int, unsigned int) ;
 
 extern void genqdyn_free (genqdyn *) ;
 extern int genqdyn_push (genqdyn *, void const *) ;
+extern int genqdyn_unpush (genqdyn *) ;
 #define GENQDYN_PEEK(type, g) ((type *)((g)->queue.s + (g)->esize * (g)->head))
 #define genqdyn_peek(g) GENQDYN_PEEK(void, (g))
 extern int genqdyn_pop(genqdyn *) ;
diff --git a/src/libdatastruct/genqdyn_unpush.c b/src/libdatastruct/genqdyn_unpush.c
@@ -0,0 +1,12 @@
+/* ISC license. */
+
+#include <skalibs/errno.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/genqdyn.h>
+
+int genqdyn_unpush (genqdyn *g)
+{
+  if (g->queue.len < g->esize) return (errno = EINVAL, 0) ;
+  g->queue.len -= g->esize ;
+  return 1 ;
+}