From e4830ddce3d477f51ecf1da447dd8e361d74a1a0 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Fri, 20 Nov 1998 13:41:43 -0200
Subject: new option "mode" in "readfrom", "writeto" and "appendto" (for binary
 files).

---
 liolib.c   | 18 ++++++++++++++----
 manual.tex | 16 +++++++++++-----
 2 files changed, 25 insertions(+), 9 deletions(-)

diff --git a/liolib.c b/liolib.c
index 2aba847c..83a57d48 100644
--- a/liolib.c
+++ b/liolib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 1.24 1998/08/30 20:25:24 roberto Exp roberto $
+** $Id: liolib.c,v 1.25 1998/09/07 18:59:59 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -62,6 +62,7 @@ static void pushresult (int i)
   else {
     lua_pushnil();
     lua_pushstring(strerror(errno));
+    lua_pushnumber(errno);
   }
 }
 
@@ -102,6 +103,15 @@ static FILE *getfileparam (char *name, int *arg) {
 }
 
 
+static char *getmode (char mode) {
+  static char m[3];
+  m[0] = mode;
+  m[1] = (*luaL_opt_string(FIRSTARG+1, "text") == 'b') ? 'b' : '\0';
+  m[2] = '\0';
+  return m;
+}
+
+
 static void closefile (char *name)
 {
   FILE *f = getfilebyname(name);
@@ -140,7 +150,7 @@ static void io_readfrom (void)
     current = lua_getuserdata(f);
   else {
     char *s = luaL_check_string(FIRSTARG);
-    current = (*s == '|') ? popen(s+1, "r") : fopen(s, "r");
+    current = (*s == '|') ? popen(s+1, "r") : fopen(s, getmode('r'));
     if (current == NULL) {
       pushresult(0);
       return;
@@ -162,7 +172,7 @@ static void io_writeto (void)
     current = lua_getuserdata(f);
   else {
     char *s = luaL_check_string(FIRSTARG);
-    current = (*s == '|') ? popen(s+1,"w") : fopen(s,"w");
+    current = (*s == '|') ? popen(s+1,"w") : fopen(s,getmode('w'));
     if (current == NULL) {
       pushresult(0);
       return;
@@ -175,7 +185,7 @@ static void io_writeto (void)
 static void io_appendto (void)
 {
   char *s = luaL_check_string(FIRSTARG);
-  FILE *fp = fopen (s, "a");
+  FILE *fp = fopen (s, getmode('a'));
   if (fp != NULL)
     setreturn(fp, FOUTPUT);
   else
diff --git a/manual.tex b/manual.tex
index 8a6925b8..8e6e4786 100644
--- a/manual.tex
+++ b/manual.tex
@@ -1,4 +1,4 @@
-% $Id: manual.tex,v 1.19 1998/08/24 20:14:56 roberto Exp roberto $
+% $Id: manual.tex,v 1.20 1998/11/13 16:48:48 roberto Exp roberto $
 
 \documentclass[11pt]{article}
 \usepackage{fullpage,bnf}
@@ -41,7 +41,7 @@ Waldemar Celes
 \tecgraf\ --- Computer Science Department --- PUC-Rio
 }
 
-%\date{\small \verb$Date: 1998/08/24 20:14:56 $}
+%\date{\small \verb$Date: 1998/11/13 16:48:48 $}
 
 \maketitle
 
@@ -2615,12 +2615,14 @@ Unless otherwise stated,
 all I/O functions return \nil\ on failure and
 some value different from \nil\ on success.
 
-\subsubsection*{\ff \T{readfrom (filename)}}\Deffunc{readfrom}
+\subsubsection*{\ff \T{readfrom (filename [, mode])}}\Deffunc{readfrom}
 
 This function may be called in two ways.
 When called with a file name, it opens the named file,
 sets its handle as the value of \verb|_INPUT|,
 and returns this value.
+An optional \verb|mode| argument with the string \verb|"binary"|
+opens file in binary mode (where this applies).
 It does not close the current input file.
 When called without parameters,
 it closes the \verb|_INPUT| file,
@@ -2639,13 +2641,15 @@ the number of files that can be open at the same time is
 usually limited and depends on the system.
 \end{quotation}
 
-\subsubsection*{\ff \T{writeto (filename)}}\Deffunc{writeto}
+\subsubsection*{\ff \T{writeto (filename [, mode])}}\Deffunc{writeto}
 
 This function may be called in two ways.
 When called with a file name,
 it opens the named file,
 sets its handle as the value of \verb|_OUTPUT|,
 and returns this value.
+An optional \verb|mode| argument with the string \verb|"binary"|
+opens file in binary mode (where this applies).
 It does not close the current output file.
 Note that, if the file already exists,
 then it will be \emph{completely erased} with this operation.
@@ -2667,10 +2671,12 @@ the number of files that can be open at the same time is
 usually limited and depends on the system.
 \end{quotation}
 
-\subsubsection*{\ff \T{appendto (filename)}}\Deffunc{appendto}
+\subsubsection*{\ff \T{appendto (filename [, mode])}}\Deffunc{appendto}
 
 Opens a file named \verb|filename| and sets it as the
 value of \verb|_OUTPUT|.
+An optional \verb|mode| argument with the string \verb|"binary"|
+opens file in binary mode (where this applies).
 Unlike the \verb|writeto| operation,
 this function does not erase any previous content of the file.
 If this function fails, it returns \nil,
-- 
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