conf2: implement clearing a dynamic array

[libucw.git] / lib / fastbuf.h

diff --git a/lib/fastbuf.h b/lib/fastbuf.h
index 25c11d70e0d2aaed6bf38b13cdd41b2d29ebd189..219fec19a7fd07852a86a560c67900c060f623b1 100644 (file)
--- a/lib/fastbuf.h
+++ b/lib/fastbuf.h
@@ -1,5 +1,5 @@
 /*
- *     Sherlock Library -- Fast Buffered I/O
+ *     UCW Library -- Fast Buffered I/O
  *
  *     (c) 1997--2004 Martin Mares <mj@ucw.cz>
  *     (c) 2004 Robert Spalek <robert@ucw.cz>
@@ -8,8 +8,8 @@
  *     of the GNU Lesser General Public License.
  */
 
-#ifndef _SHERLOCK_FASTBUF_H
-#define _SHERLOCK_FASTBUF_H
+#ifndef _UCW_FASTBUF_H
+#define _UCW_FASTBUF_H
 
 #ifndef EOF
 #include <stdio.h>
@@ -109,6 +109,12 @@ fbbuf_count_written(struct fastbuf *f)
   return f->bptr - f->bstop;
 }
 
+/* FastIO on recyclable growing buffers */
+
+struct fastbuf *fbgrow_create(unsigned basic_size);
+void fbgrow_reset(struct fastbuf *b);                  /* Reset stream and prepare for writing */
+void fbgrow_rewind(struct fastbuf *b);                 /* Prepare for reading */
+
 /* Configuring stream parameters */
 
 int bconfig(struct fastbuf *f, uns type, int data);
@@ -122,7 +128,6 @@ void bflush(struct fastbuf *f);
 void bseek(struct fastbuf *f, sh_off_t pos, int whence);
 void bsetpos(struct fastbuf *f, sh_off_t pos);
 void brewind(struct fastbuf *f);
-void bskip(struct fastbuf *f, uns len);
 sh_off_t bfilesize(struct fastbuf *f);
 
 static inline sh_off_t btell(struct fastbuf *f)
@@ -346,6 +351,18 @@ bbcopy(struct fastbuf *f, struct fastbuf *t, uns l)
     bbcopy_slow(f, t, l);
 }
 
+int bskip_slow(struct fastbuf *f, uns len);
+static inline int bskip(struct fastbuf *f, uns len)
+{
+  if (bavailr(f) >= len)
+    {
+      f->bptr += len;
+      return 1;
+    }
+  else
+    return bskip_slow(f, len);
+}
+
 /* I/O on addr_int_t */
 
 #ifdef CPU_64BIT_POINTERS
@@ -362,7 +379,10 @@ static inline uns
 bdirect_read_prepare(struct fastbuf *f, byte **buf)
 {
   if (f->bptr == f->bstop && !f->refill(f))
-    return 0;
+    {
+      *buf = NULL;  // This is not needed, but it helps to get rid of spurious warnings
+      return 0;
+    }
   *buf = f->bptr;
   return bavailr(f);
 }
@@ -397,7 +417,7 @@ bdirect_write_commit(struct fastbuf *f, byte *pos)
 
 /* Formatted output */
 
-int bprintf(struct fastbuf *b, byte *msg, ...);
-int vbprintf(struct fastbuf *b, byte *msg, va_list args);
+int bprintf(struct fastbuf *b, char *msg, ...) FORMAT_CHECK(printf,2,3);
+int vbprintf(struct fastbuf *b, char *msg, va_list args);
 
 #endif