aded buffer_getc, buffer_getn get n bytes less only if EOF and

buffer_get_token for getting n bytes till finding a termination char or
EOF/error.

buffer.h

@@ -32,6 +32,9 @@ extern int buffer_putsflush(buffer* b,const char* x);
 extern int buffer_get(buffer* b,char* x,unsigned int len);
 extern int buffer_bget(buffer* b,char* x,unsigned int len);
 extern int buffer_feed(buffer* b);
+extern int buffer_getc(buffer* b,char* x);
+extern int buffer_getn(buffer* b,char* x,unsigned int len);
+extern int buffer_get_token(buffer* b,char* x,unsigned int len,const char* charset,unsigned int setlen);
 
 extern char *buffer_peek(buffer* b);
 extern void buffer_seek(buffer* b,unsigned int len);

buffer/buffer_get_token.c

@@ -0,0 +1,15 @@
+#include "byte.h"
+#include "buffer.h"
+#include "scan.h"
+
+int buffer_get_token(buffer* b,char* x,unsigned int len,const char* charset,unsigned int setlen) {
+  int blen;
+
+  for (blen=0;blen<len;++blen) {
+    if ((r=buffer_getc(b,*x))<0) return r;
+    if (r==0) return blen;
+    if (byte_chr(charset,clen,*x)<clen) return blen;
+    ++x;
+  }
+  return blen;
+}

buffer/buffer_getc.c

@@ -0,0 +1,12 @@
+#include "byte.h"
+#include "buffer.h"
+
+int buffer_getc(buffer* b,char* x) {
+  if (b->p==b->n) {
+    register int blen;
+    if ((blen=buffer_feed(b))<=0) return blen;
+  }
+  *x=b->x[b->p];
+  ++b->p;
+  return 1;
+}

buffer/buffer_getn.c

@@ -0,0 +1,13 @@
+#include "byte.h"
+#include "buffer.h"
+
+int buffer_getn(buffer* b,char* x,unsigned int len) {
+  int blen;
+
+  for(blen=0;blen<len;++blen) {
+    if ((r=buffer_getc(b,x))<0) return r;
+    if (r==0) return blen;
+    ++x;
+  }
+  return blen;
+}