Fix potential access of freed data (only if we couldn't create the

[u/mdw/putty] / putty.h

diff --git a/putty.h b/putty.h
index 4ad3124..b6aace7 100644 (file)
--- a/putty.h
+++ b/putty.h
@@ -36,6 +36,11 @@ typedef struct terminal_tag Terminal;
  *
  * The LATTRs (line attributes) are an entirely disjoint space of
  * flags.
+ * 
+ * The DATTRs (display attributes) are internal to terminal.c (but
+ * defined here because their values have to match the others
+ * here); they reuse the TATTR_* space but are always masked off
+ * before sending to the front end.
  *
  * ATTR_INVALID is an illegal colour combination.
  */
@@ -45,6 +50,12 @@ typedef struct terminal_tag Terminal;
 #define TATTR_RIGHTCURS            0x10000000UL      /* cursor-on-RHS */
 #define TATTR_COMBINING            0x80000000UL      /* combining characters */
 
+#define DATTR_STARTRUN      0x80000000UL   /* start of redraw run */
+
+#define TDATTR_MASK         0xF0000000UL
+#define TATTR_MASK (TDATTR_MASK)
+#define DATTR_MASK (TDATTR_MASK)
+
 #define LATTR_NORM   0x00000000UL
 #define LATTR_WIDE   0x00000001UL
 #define LATTR_TOP    0x00000002UL
@@ -53,7 +64,7 @@ typedef struct terminal_tag Terminal;
 #define LATTR_WRAPPED 0x00000010UL
 #define LATTR_WRAPPED2 0x00000020UL
 
-#define ATTR_INVALID 0x03FFU
+#define ATTR_INVALID 0x03FFFFU
 
 /* Like Linux use the F000 page for direct to font. */
 #define CSET_OEMCP   0x0000F000UL      /* OEM Codepage DTF */
@@ -80,24 +91,40 @@ typedef struct terminal_tag Terminal;
  */
 #define UCSWIDE             0xDFFF
 
-#define ATTR_NARROW  0x8000U
-#define ATTR_WIDE    0x4000U
-#define ATTR_BOLD    0x0400U
-#define ATTR_UNDER   0x0800U
-#define ATTR_REVERSE 0x1000U
-#define ATTR_BLINK   0x2000U
-#define ATTR_FGMASK  0x001FU
-#define ATTR_BGMASK  0x03E0U
-#define ATTR_COLOURS 0x03FFU
+#define ATTR_NARROW  0x800000U
+#define ATTR_WIDE    0x400000U
+#define ATTR_BOLD    0x040000U
+#define ATTR_UNDER   0x080000U
+#define ATTR_REVERSE 0x100000U
+#define ATTR_BLINK   0x200000U
+#define ATTR_FGMASK  0x0001FFU
+#define ATTR_BGMASK  0x03FE00U
+#define ATTR_COLOURS 0x03FFFFU
 #define ATTR_FGSHIFT 0
-#define ATTR_BGSHIFT 5
+#define ATTR_BGSHIFT 9
 
-#define ATTR_DEFAULT 0x0128U          /* bg 9, fg 8 */
-#define ATTR_DEFFG   0x0008U
-#define ATTR_DEFBG   0x0120U
-
-#define ATTR_CUR_AND (~(ATTR_BOLD|ATTR_REVERSE|ATTR_BLINK|ATTR_COLOURS))
-#define ATTR_CUR_XOR 0x016AU
+/*
+ * The definitive list of colour numbers stored in terminal
+ * attribute words is kept here. It is:
+ * 
+ *  - 0-7 are ANSI colours (KRGYBMCW).
+ *  - 8-15 are the bold versions of those colours.
+ *  - 16-255 are the remains of the xterm 256-colour mode (a
+ *    216-colour cube with R at most significant and B at least,
+ *    followed by a uniform series of grey shades running between
+ *    black and white but not including either on grounds of
+ *    redundancy).
+ *  - 256 is default foreground
+ *  - 257 is default bold foreground
+ *  - 258 is default background
+ *  - 259 is default bold background
+ *  - 260 is cursor foreground
+ *  - 261 is cursor background
+ */
+
+#define ATTR_DEFFG   (256 << ATTR_FGSHIFT)
+#define ATTR_DEFBG   (258 << ATTR_BGSHIFT)
+#define ATTR_DEFAULT (ATTR_DEFFG | ATTR_DEFBG)
 
 struct sesslist {
     int nsessions;
@@ -436,6 +463,7 @@ struct config_tag {
     Filename logfilename;
     int logtype;
     int logxfovr;
+    int logflush;
     int logomitpass;
     int logomitdata;
     int hide_mouseptr;
@@ -447,6 +475,7 @@ struct config_tag {
     int bidi;
     /* Colour options */
     int ansi_colour;
+    int xterm_256_colour;
     int system_colour;
     int try_palette;
     int bold_colour;
@@ -742,10 +771,14 @@ void luni_send(void *, wchar_t * widebuf, int len, int interactive);
  */
 
 void random_add_noise(void *noise, int length);
-void random_init(void);
 int random_byte(void);
 void random_get_savedata(void **data, int *len);
 extern int random_active;
+/* The random number subsystem is activated if at least one other entity
+ * within the program expresses an interest in it. So each SSH session
+ * calls random_ref on startup and random_unref on shutdown. */
+void random_ref(void);
+void random_unref(void);
 
 /*
  * Exports from pinger.c.