From: Martin Mares <mj@ucw.cz>
Date: Mon, 28 Jul 1997 20:38:50 +0000 (+0000)
Subject: New buffering code and objget caching changes.
X-Git-Tag: holmes-import~1694
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=cdcccde56995c2c1263c4d209fefff596c8731d3;p=libucw.git

New buffering code and objget caching changes.
---

diff --git a/lib/fastbuf.c b/lib/fastbuf.c
index 9756c978..4c0bf6db 100644
--- a/lib/fastbuf.c
+++ b/lib/fastbuf.c
@@ -89,24 +89,20 @@ void bflush(struct fastbuf *f)
 {
   if (f->bptr != f->buffer)
     {					/* Have something to flush */
-      if (f->bstop > f->buffer)
-	{				/* And it's read data */
+      if (f->bstop > f->buffer)		/* Read data? */
+	{
 	  f->bptr = f->bstop = f->buffer;
+	  f->pos = f->fdpos;
 	}
-      else
-	{				/* Write data */
-	  wrbuf(f);
-	}
+      else				/* Write data... */
+	wrbuf(f);
     }
 }
 
 inline void bsetpos(struct fastbuf *f, uns pos)
 {
-  if (pos >= f->pos
-      && (pos <= f->pos + (f->bptr - f->buffer) || pos <= f->pos + (f->bstop - f->buffer)))
-    {
-      f->bptr = f->buffer + (pos - f->pos);
-    }
+  if (pos >= f->pos && (pos <= f->pos + (f->bptr - f->buffer) || pos <= f->pos + (f->bstop - f->buffer)))
+    f->bptr = f->buffer + (pos - f->pos);
   else
     {
       bflush(f);
@@ -147,6 +143,15 @@ int bgetc_slow(struct fastbuf *f)
   return *f->bptr++;
 }
 
+int bpeekc_slow(struct fastbuf *f)
+{
+  if (f->bptr < f->bstop)
+    return *f->bptr;
+  if (!rdbuf(f))
+    return EOF;
+  return *f->bptr;
+}
+
 void bputc_slow(struct fastbuf *f, byte c)
 {
   if (f->bptr >= f->bufend)
@@ -246,6 +251,28 @@ void bwrite_slow(struct fastbuf *f, void *b, uns l)
     }
 }
 
+byte *					/* Non-standard */
+bgets(struct fastbuf *f, byte *b, uns l)
+{
+  byte *e = b + l - 1;
+  int k;
+
+  k = bgetc(f);
+  if (k == EOF)
+    return NULL;
+  while (b < e)
+    {
+      if (k == '\n' || k == EOF)
+	{
+	  *b = 0;
+	  return b;
+	}
+      *b++ = k;
+      k = bgetc(f);
+    }
+  die("%s: Line too long", f->name);
+}
+
 void bbcopy(struct fastbuf *f, struct fastbuf *t, uns l)
 {
   uns rf = f->bstop - f->bptr;
diff --git a/lib/fastbuf.h b/lib/fastbuf.h
index 8195250e..ba9c42c5 100644
--- a/lib/fastbuf.h
+++ b/lib/fastbuf.h
@@ -37,6 +37,12 @@ extern inline int bgetc(struct fastbuf *f)
   return (f->bptr < f->bstop) ? (int) *f->bptr++ : bgetc_slow(f);
 }
 
+int bpeekc_slow(struct fastbuf *f);
+extern inline int bpeekc(struct fastbuf *f)
+{
+  return (f->bptr < f->bstop) ? (int) *f->bptr : bpeekc_slow(f);
+}
+
 extern inline void bungetc(struct fastbuf *f, byte c)
 {
   *--f->bptr = c;
@@ -54,99 +60,97 @@ extern inline void bputc(struct fastbuf *f, byte c)
 word bgetw_slow(struct fastbuf *f);
 extern inline word bgetw(struct fastbuf *f)
 {
-#ifdef CPU_CAN_DO_UNALIGNED_WORDS
   word w;
   if (f->bptr + 2 <= f->bstop)
     {
-      w = * ((word *) f->bptr);
-      f->bptr += 2;
-      return w;
-    }
-  else
-    return bgetw_slow(f);
+      byte *p = f->bptr;
+#ifdef CPU_CAN_DO_UNALIGNED_WORDS
+      w = * ((word *) p);
 #else
-  word w = bgetc(f);
 #ifdef CPU_BIG_ENDIAN
-  return (w << 8) | bgetc(f);
+      w = (p[0] << 8) | p[1];
 #else
-  return w | (bgetc(f) << 8);
+      w = (p[1] << 8) | p[0];
 #endif
 #endif
+      f->bptr += 2;
+      return w;
+    }
+  else
+    return bgetw_slow(f);
 }
 
 ulg bgetl_slow(struct fastbuf *f);
 extern inline ulg bgetl(struct fastbuf *f)
 {
-#ifdef CPU_CAN_DO_UNALIGNED_LONGS
   ulg l;
   if (f->bptr + 4 <= f->bstop)
     {
-      l = * ((ulg *) f->bptr);
-      f->bptr += 4;
-      return l;
-    }
-  else
-    return bgetl_slow(f);
+      byte *p = f->bptr;
+#ifdef CPU_CAN_DO_UNALIGNED_LONGS
+      l = * ((ulg *) p);
 #else
-  ulg l = bgetc(f);
 #ifdef CPU_BIG_ENDIAN
-  l = (l << 8) | bgetc(f);
-  l = (l << 8) | bgetc(f);
-  return (l << 8) | bgetc(f);
+      l = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
 #else
-  l = (bgetc(f) << 8) | l;
-  l = (bgetc(f) << 16) | l;
-  return (bgetc(f) << 24) | l;
+      l = (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0];
 #endif
 #endif
+      f->bptr += 4;
+      return l;
+    }
+  else
+    return bgetl_slow(f);
 }
 
 void bputw_slow(struct fastbuf *f, word w);
 extern inline void bputw(struct fastbuf *f, word w)
 {
-#ifdef CPU_CAN_DO_UNALIGNED_WORDS
   if (f->bptr + 2 <= f->bufend)
     {
-      * ((word *) f->bptr) = w;
-      f->bptr += 2;
-    }
-  else
-    bputw_slow(f, w);
+      byte *p = f->bptr;
+#ifdef CPU_CAN_DO_UNALIGNED_WORDS
+      * ((word *) p) = w;
 #else
 #ifdef CPU_BIG_ENDIAN
-  bputc(f, w >> 8);
-  bputc(f, w);
+      p[0] = w >> 8U;
+      p[1] = w;
 #else
-  bputc(f, w);
-  bputc(f, w >> 8);
+      p[1] = w >> 8U;
+      p[0] = w;
 #endif
 #endif
+      f->bptr += 2;
+    }
+  else
+    bputw_slow(f, w);
 }
 
 void bputl_slow(struct fastbuf *f, ulg l);
 extern inline void bputl(struct fastbuf *f, ulg l)
 {
-#ifdef CPU_CAN_DO_UNALIGNED_LONGS
   if (f->bptr + 4 <= f->bufend)
     {
-      * ((ulg *) f->bptr) = l;
-      f->bptr += 4;
-    }
-  else
-    bputl_slow(f, l);
+      byte *p = f->bptr;
+#ifdef CPU_CAN_DO_UNALIGNED_LONGS
+      * ((ulg *) p) = l;
 #else
 #ifdef CPU_BIG_ENDIAN
-  bputc(f, l >> 24);
-  bputc(f, l >> 16);
-  bputc(f, l >> 8);
-  bputc(f, l);
+      p[0] = l >> 24U;
+      p[1] = l >> 16U;
+      p[2] = l >> 8U;
+      p[3] = l;
 #else
-  bputc(f, l);
-  bputc(f, l >> 8);
-  bputc(f, l >> 16);
-  bputc(f, l >> 24);
+      p[3] = l >> 24U;
+      p[2] = l >> 16U;
+      p[1] = l >> 8U;
+      p[0] = l;
 #endif
 #endif
+      f->bptr += 4;
+    }
+  else
+    bputl_slow(f, l);
 }
 
 void bread_slow(struct fastbuf *f, void *b, uns l);
@@ -174,34 +178,12 @@ extern inline void bwrite(struct fastbuf *f, void *b, uns l)
 }
 
 void bbcopy(struct fastbuf *f, struct fastbuf *t, uns l);
-
-extern inline byte *			/* Non-standard */
-bgets(struct fastbuf *f, byte *b, uns l)
-{
-  byte *e = b + l - 1;
-  int k;
-
-  k = bgetc(f);
-  if (k == EOF)
-    return NULL;
-  while (b < e)
-    {
-      if (k == '\n' || k == EOF)
-	{
-	  *b = 0;
-	  return b;
-	}
-      *b++ = k;
-      k = bgetc(f);
-    }
-  die("%s: Line too long", f->name);
-}
+byte *bgets(struct fastbuf *f, byte *b, uns l);	/* Non-std */
 
 extern inline void
 bputs(struct fastbuf *f, byte *b)
 {
-  while (*b)
-    bputc(f, *b++);
+  bwrite(f, b, strlen(b));
 }
 
 extern inline void