Imported from ../bash-2.05.tar.gz.

[platform/upstream/bash.git] / command.h

diff --git a/command.h b/command.h
index 92c7fb4..ad286c4 100644 (file)
--- a/command.h
+++ b/command.h
@@ -17,7 +17,7 @@
 
    You should have received a copy of the GNU General Public License along
    with Bash; see the file COPYING.  If not, write to the Free Software
-   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+   Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
 
 #if !defined (_COMMAND_H_)
 #define _COMMAND_H_
@@ -39,6 +39,9 @@ enum r_instruction {
 #define RESTRICTED_REDIRECT -3 /* can only happen in restricted shells. */
 #define HEREDOC_REDIRECT    -4  /* here-doc temp file can't be created */
 
+#define CLOBBERING_REDIRECT(ri) \
+  (ri == r_output_direction || ri == r_err_and_out)
+
 #define OUTPUT_REDIRECT(ri) \
   (ri == r_output_direction || ri == r_input_output || ri == r_err_and_out)
 
@@ -54,7 +57,8 @@ enum r_instruction {
 
 /* Command Types: */
 enum command_type { cm_for, cm_case, cm_while, cm_if, cm_simple, cm_select,
-                   cm_connection, cm_function_def, cm_until, cm_group };
+                   cm_connection, cm_function_def, cm_until, cm_group,
+                   cm_arith, cm_cond, cm_arith_for, cm_subshell };
 
 /* Possible values for the `flags' field of a WORD_DESC. */
 #define W_HASDOLLAR    0x01    /* Dollar sign present. */
@@ -62,12 +66,15 @@ enum command_type { cm_for, cm_case, cm_while, cm_if, cm_simple, cm_select,
 #define W_ASSIGNMENT   0x04    /* This word is a variable assignment. */
 #define W_GLOBEXP      0x08    /* This word is the result of a glob expansion. */
 #define W_NOSPLIT      0x10    /* Do not perform word splitting on this word. */
+#define W_NOGLOB       0x20    /* Do not perform globbing on this word. */
+#define W_NOSPLIT2     0x40    /* Don't split word except for $@ expansion. */
 
 /* Possible values for subshell_environment */
 #define SUBSHELL_ASYNC 0x01    /* subshell caused by `command &' */
 #define SUBSHELL_PAREN 0x02    /* subshell caused by ( ... ) */
 #define SUBSHELL_COMSUB        0x04    /* subshell caused by `command` or $(command) */
 #define SUBSHELL_FORK  0x08    /* subshell caused by executing a disk command */
+#define SUBSHELL_PIPE  0x10    /* subshell from a pipeline element */
 
 /* A structure which represents a word. */
 typedef struct word_desc {
@@ -143,6 +150,16 @@ typedef struct command {
 #if defined (SELECT_COMMAND)
     struct select_com *Select;
 #endif
+#if defined (DPAREN_ARITHMETIC)
+    struct arith_com *Arith;
+#endif
+#if defined (COND_COMMAND)
+    struct cond_com *Cond;
+#endif
+#if defined (ARITH_FOR_COMMAND)
+    struct arith_for_com *ArithFor;
+#endif
+    struct subshell_com *Subshell;
   } value;
 } COMMAND;
 
@@ -180,6 +197,17 @@ typedef struct for_com {
                           members of MAP_LIST. */
 } FOR_COM;
 
+#if defined (ARITH_FOR_COMMAND)
+typedef struct arith_for_com {
+  int flags;
+  int line;    /* generally used for error messages */
+  WORD_LIST *init;
+  WORD_LIST *test;
+  WORD_LIST *step;
+  COMMAND *action;
+} ARITH_FOR_COM;
+#endif
+
 #if defined (SELECT_COMMAND)
 /* KSH SELECT command. */
 typedef struct select_com {
@@ -207,6 +235,34 @@ typedef struct while_com {
   COMMAND *action;             /* Thing to do while test is non-zero. */
 } WHILE_COM;
 
+#if defined (DPAREN_ARITHMETIC)
+/* The arithmetic evaluation command, ((...)).  Just a set of flags and
+   a WORD_LIST, of which the first element is the only one used, for the
+   time being. */
+typedef struct arith_com {
+  int flags;
+  WORD_LIST *exp;
+  int line;
+} ARITH_COM;
+#endif /* DPAREN_ARITHMETIC */
+
+/* The conditional command, [[...]].  This is a binary tree -- we slippped
+   a recursive-descent parser into the YACC grammar to parse it. */
+#define COND_AND       1
+#define COND_OR                2
+#define COND_UNARY     3
+#define COND_BINARY    4
+#define COND_TERM      5
+#define COND_EXPR      6
+
+typedef struct cond_com {
+  int flags;
+  int line;
+  int type;
+  WORD_DESC *op;
+  struct cond_com *left, *right;
+} COND_COM;
+
 /* The "simple" command.  Just a collection of words and redirects. */
 typedef struct simple_com {
   int flags;                   /* See description of CMD flags. */
@@ -218,7 +274,7 @@ typedef struct simple_com {
 
 /* The "function definition" command. */
 typedef struct function_def {
-  int ignore;                  /* See description of CMD flags. */
+  int flags;                   /* See description of CMD flags. */
   WORD_DESC *name;             /* The name of the function. */
   COMMAND *command;            /* The parsed execution tree. */
   int line;                    /* Line number the function def starts on. */
@@ -231,8 +287,21 @@ typedef struct group_com {
   COMMAND *command;
 } GROUP_COM;
 
+typedef struct subshell_com {
+  int flags;
+  COMMAND *command;
+} SUBSHELL_COM;
+
 extern COMMAND *global_command;
 
+/* Possible command errors */
+#define CMDERR_DEFAULT 0
+#define CMDERR_BADTYPE 1
+#define CMDERR_BADCONN 2
+#define CMDERR_BADJUMP 3
+
+#define CMDERR_LAST    3
+
 /* Forward declarations of functions declared in copy_cmd.c. */
 
 extern WORD_DESC *copy_word __P((WORD_DESC *));