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SYMBOL.C
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C/C++ Source or Header
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1992-01-06
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19KB
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503 lines
/*
* Symbol table stuff.
* Symbol tables, and keymap setup.
* The terminal specific parts of building the
* keymap has been moved to a better place.
*/
#include "def.h"
void keyadd ();
void keydup ();
extern char MSG_byte_shift[];
extern char MSG_back_char[];
extern char MSG_quit[];
extern char MSG_forw_del_char[];
extern char MSG_toggle_swap[];
extern char MSG_forw_char[];
extern char MSG_abort[];
extern char MSG_ins_self[];
extern char MSG_back_del_char[];
extern char MSG_refresh[];
extern char MSG_forw_line[];
extern char MSG_back_line[];
extern char MSG_quote[];
extern char MSG_recall[];
extern char MSG_twiddle[];
extern char MSG_forw_page[];
extern char MSG_kill_region[];
extern char MSG_yank[];
extern char MSG_down_window[];
extern char MSG_ins_toggle[];
extern char MSG_display_buffers[];
extern char MSG_quit[];
extern char MSG_exit_flush_all[];
extern char MSG_set_file_name[];
extern char MSG_file_insert[];
extern char MSG_buf_size_lock[];
extern char MSG_flush_all[];
extern char MSG_down_window[];
extern char MSG_up_window[];
extern char MSG_file_read[];
extern char MSG_file_save[];
extern char MSG_file_visit[];
extern char MSG_file_write[];
extern char MSG_swap_dot_and_mark[];
extern char MSG_shrink_window[];
extern char MSG_display_position[];
extern char MSG_start_macro[];
extern char MSG_end_macro[];
extern char MSG_help[];
extern char MSG_only_window[];
extern char MSG_del_window[];
extern char MSG_split_window[];
extern char MSG_use_buffer[];
extern char MSG_spawn_cli[];
extern char MSG_execute_macro[];
extern char MSG_goto_line[];
extern char MSG_ins_unit[];
extern char MSG_kill_buffer[];
extern char MSG_load_bindings[];
extern char MSG_forw_window[];
extern char MSG_back_window[];
extern char MSG_view_file[];
extern char MSG_enlarge_window[];
extern char MSG_ascii_mode[];
extern char MSG_binary_mode[];
extern char MSG_buffer_name[];
extern char MSG_decimal_mode[];
extern char MSG_ebcdic_mode[];
extern char MSG_hex_mode[];
extern char MSG_back_del_unit[];
extern char MSG_octal_mode[];
extern char MSG_display_version[];
extern char MSG_unit_size1[];
extern char MSG_unit_size2[];
extern char MSG_unit_size4[];
extern char MSG_reposition_window[];
extern char MSG_set_mark[];
extern char MSG_goto_eob[];
extern char MSG_goto_bob[];
extern char MSG_next_buff[];
extern char MSG_prev_buff[];
extern char MSG_query_replace[];
extern char MSG_display_bindings[];
extern char MSG_auto_save[];
extern char MSG_back_unit[];
extern char MSG_compare[];
extern char MSG_forw_del_unit[];
extern char MSG_forw_unit[];
extern char MSG_link_windows[];
extern char MSG_print[];
extern char MSG_back_search[];
extern char MSG_forw_search[];
extern char MSG_back_page[];
extern char MSG_copy_region[];
extern char MSG_extended_command[];
extern char MSG_up_window[];
extern char MSG_search_again[];
extern char MSG_bind_to_key[];
extern char MSG_file_visit_split[];
extern char MSG_yank_buffer[];
extern char MSG_save_region[];
extern char MSG_use_buffer_split[];
extern char MSG_no_f_tb[];
extern char MSG_n_split[];
extern char MSG_n_combine[];
extern char MSG_show_save_buf[];
/*
* Defined by "main.c".
*/
extern char ctrlg (); /* Abort out of things */
extern char quit (); /* Quit */
extern char ctlxlp (); /* Begin macro */
extern char ctlxrp (); /* End macro */
extern char ctlxe (); /* Execute macro */
extern char showversion (); /* Show version numbers, etc. */
extern char flushnquit (); /* Flush buffers & exit (fitz) */
extern char flush_all (); /* Flush buffers (jam) */
extern char autosave (); /* autosave function (jam) */
/*
* Defined by "search.c".
*/
extern char forwsearch (); /* Search forward */
extern char backsearch (); /* Search backwards */
extern char searchagain (); /* Repeat last search command */
extern char queryrepl (); /* Query replace */
extern char compare (); /* Compare two windows */
extern char recall (); /* Recall last search string */
/*
* Defined by "basic.c".
*/
extern char backchar (); /* Move backward by characters */
extern char forwchar (); /* Move forward by characters */
extern char gotobob (); /* Move to start of buffer */
extern char gotoeob (); /* Move to end of buffer */
extern char forwline (); /* Move forward by lines */
extern char backline (); /* Move backward by lines */
extern char forwpage (); /* Move forward by pages */
extern char backpage (); /* Move backward by pages */
extern char setmark (); /* Set mark */
extern char swapmark (); /* Swap "." and mark */
extern char gotoline (); /* Go to a specified line. */
/*
* Defined by "buffer.c".
*/
extern char listbuffers (); /* Display list of buffers */
extern char showsavebuf (); /* Show the save buffer contents */
extern char usebuffer (); /* Switch a window to a buffer */
extern char use_buffer (); /* ditto, plus window split */
extern char killbuffer (); /* Make a buffer go away. */
extern char next_buf (); /* goto next buffer */
extern char prev_buf (); /* goto prev buffer */
extern char yank_buffer (); /* yank buffer by name */
extern char buffername (); /* change buffer name */
extern char bufsizlock (); /* lock buffer size */
/*
* Defined by "file."
*/
extern char fileread (); /* Get a file, read only */
extern char filevisit (); /* Get a file, read write */
extern char file_visit (); /* ditto , plus window split */
extern char filewrite (); /* Write a file */
extern char filesave (); /* Save current file */
extern char filename (); /* Adjust file name */
extern char fileinsert (); /* insert file to cursor (jam ) */
extern char viewfile (); /* readonly file visit (jam) */
/*
* Defined by "random.c".
*/
extern char dispshift (); /* Increment display shift */
extern char selfinsert (); /* Insert character */
extern char insert_toggle (); /* toggle insert mode (jam) */
extern char insertunit (); /* insert unit (pvr) */
extern char showcpos (); /* Show the cursor position */
extern char twiddle (); /* Twiddle units */
extern char forwdel (); /* Forward delete */
extern char backdel (); /* Backward delete */
extern char quote (); /* Insert literal */
extern char asciimode (); /* display ASCII data */
extern char ebcdicmode (); /* display EBCDIC data */
extern char decimalmode (); /* display DECIMAL data */
extern char hexmode (); /* display HEX data */
extern char octalmode (); /* display OCTAL data */
extern char binarymode (); /* display BINARY data */
extern char dispsize1 (); /* display in BYTE format */
extern char dispsize2 (); /* display in WORD format */
extern char dispsize4 (); /* display in DWORD format*/
extern char dispswapbyte (); /* Display swaped bytes pvr */
extern char yank (); /* Yank back from killbuffer. */
extern char linkwind (); /* Link all windows on one buffer. */
extern char n_way_split (); /* Split buffer into n buffers. */
extern char n_way_combine (); /* Combine n buffers into one. */
/*
* Defined by "region.c".
*/
extern char killregion (); /* Kill region. */
extern char copyregion (); /* Copy region to kill buffer. */
extern char save_region (); /* Save region in named buffer. */
/*
* Defined by "spawn.c".
*/
extern char spawncli (); /* Run CLI in a subjob. */
extern char clock (); /* display time in modeline */
/*
* Defined by "window.c".
*/
extern char reposition (); /* Reposition window */
extern char refresh (); /* Refresh the screen */
extern char nextwind (); /* Move to the next window */
extern char prevwind (); /* Move to the previous window */
extern char mvdnwind (); /* Move window down */
extern char mvupwind (); /* Move window up */
extern char onlywind (); /* Make current window only one */
extern char delwind (); /* Delete current window */
extern char splitwind (); /* Split current window */
extern char enlargewind (); /* Enlarge display window. */
extern char shrinkwind (); /* Shrink window. */
/*
* Defined by "word.c".
*/
extern char backunit (); /* Backup by units */
extern char forwunit (); /* Advance by units */
extern char delfunit (); /* Delete forward unit. */
extern char delbunit (); /* Delete backward unit. */
/*
* Defined by "extend.c".
*/
extern char extend (); /* Extended commands. */
extern char help (); /* Help key. */
extern char bindtokey (); /* Modify key bindings. */
extern char wallchart (); /* Make wall chart. */
extern void check_extend (); /* load extended key file */
extern char load_extend (); /* load extended file by name */
/*
* Defined by "display.c
*/
extern char print (); /* print window from mark to dot */
typedef struct
{
short k_key; /* Key to bind. */
char (*k_funcp) (); /* Function. */
char *k_name; /* Function name string. */
char k_modify; /* modify bit */
} KEY;
/*
* Default key binding table. This contains
* the function names, the symbol table name, and (possibly)
* a key binding for the builtin functions. There are no
* bindings for C-U or C-X. These are done with special
* code, but should be done normally.
*/
KEY key[] =
{
KCTRL | 'A', dispshift, MSG_byte_shift, 0,
KCTRL | 'B', backchar, MSG_back_char, SSRCH | SRPLC,
KCTRL | 'C', quit, MSG_quit, 0,/* pvr */
KCTRL | 'D', forwdel, MSG_forw_del_char, SMOD | SSIZE | SSRCH | SRPLC,
KCTRL | 'E', dispswapbyte, MSG_toggle_swap, SSRCH | SRPLC,/* pvr */
KCTRL | 'F', forwchar, MSG_forw_char, SSRCH | SRPLC,
KCTRL | 'G', ctrlg, MSG_abort, SSRCH | SRPLC,
KCTRL | 'I', selfinsert, MSG_ins_self, SMOD | SSRCH | SRPLC,
KCTRL | 'H', backdel, MSG_back_del_char, SMOD | SSIZE | SSRCH | SRPLC,
KCTRL | 'L', refresh, MSG_refresh, SSRCH | SRPLC,
KCTRL | 'N', forwline, MSG_forw_line, SSRCH | SRPLC,
KCTRL | 'P', backline, MSG_back_line, SSRCH | SRPLC,
KCTRL | 'Q', quote, MSG_quote, 0,
KCTRL | 'R', recall, MSG_recall, SSRCH | SRPLC,
KCTRL | 'T', twiddle, MSG_twiddle, SMOD | SSRCH | SRPLC,
KCTRL | 'V', forwpage, MSG_forw_page, SRPLC,
KCTRL | 'W', killregion, MSG_kill_region, SMOD | SSIZE,
KCTRL | 'Y', yank, MSG_yank, SMOD | SSIZE,
KCTRL | 'Z', mvdnwind, MSG_down_window, 0,/* fitz */
KCTLX | KCTRL | 'A', insert_toggle, MSG_ins_toggle, SSRCH | SRPLC,
KCTLX | KCTRL | 'B', listbuffers, MSG_display_buffers, 0,
KCTLX | KCTRL | 'C', quit, MSG_quit, 0,
KCTLX | KCTRL | 'E', flushnquit, MSG_exit_flush_all, 0,/* fitz */
KCTLX | KCTRL | 'F', filename, MSG_set_file_name, SMOD,/* jam */
KCTLX | KCTRL | 'I', fileinsert, MSG_file_insert, SMOD | SSIZE,
KCTLX | KCTRL | 'L', bufsizlock, MSG_buf_size_lock, 0,
KCTLX | KCTRL | 'M', flush_all, MSG_flush_all, 0,
KCTLX | KCTRL | 'N', mvdnwind, MSG_down_window, 0,
KCTLX | KCTRL | 'P', mvupwind, MSG_up_window, 0,
KCTLX | KCTRL | 'R', fileread, MSG_file_read, 0,
KCTLX | KCTRL | 'S', filesave, MSG_file_save, 0,
KCTLX | KCTRL | 'V', filevisit, MSG_file_visit, 0,
KCTLX | KCTRL | 'W', filewrite, MSG_file_write, 0,
KCTLX | KCTRL | 'X', swapmark, MSG_swap_dot_and_mark, 0,
KCTLX | KCTRL | 'Z', shrinkwind, MSG_shrink_window, 0,
KCTLX | '=', showcpos, MSG_display_position, 0,
KCTLX | '(', ctlxlp, MSG_start_macro, 0,
KCTLX | ')', ctlxrp, MSG_end_macro, 0,
KCTLX | '?', help, MSG_help, 0,
KCTLX | '0', delwind, MSG_del_window, 0,
KCTLX | '1', onlywind, MSG_only_window, 0,
KCTLX | '2', splitwind, MSG_split_window, 0,
KCTLX | 'B', usebuffer, MSG_use_buffer, 0,
KCTLX | 'C', spawncli, MSG_spawn_cli, 0,/* fitz */
KCTLX | 'E', ctlxe, MSG_execute_macro, 0,
KCTLX | 'G', gotoline, MSG_goto_line, 0,
KCTLX | 'I', insertunit, MSG_ins_unit, SMOD | SSIZE | SSRCH | SRPLC,
KCTLX | 'K', killbuffer, MSG_kill_buffer, 0,
KCTLX | 'L', load_extend, MSG_load_bindings, 0,
KCTLX | 'N', nextwind, MSG_forw_window, 0,
KCTLX | 'P', prevwind, MSG_back_window, 0,
KCTLX | 'V', viewfile, MSG_view_file, 0,/* jam */
KCTLX | 'Z', enlargewind, MSG_enlarge_window, 0,
KMETA | KCTRL | 'A', asciimode, MSG_ascii_mode, SSRCH | SRPLC, /* pvr */
KMETA | KCTRL | 'B', binarymode, MSG_binary_mode, SSRCH | SRPLC, /* pvr */
KMETA | KCTRL | 'F', n_way_combine, MSG_n_combine, SSIZE | SMOD, /* pvr */
KMETA | KCTRL | 'N', buffername, MSG_buffer_name, 0,
KMETA | KCTRL | 'D', decimalmode, MSG_decimal_mode, SSRCH | SRPLC, /* pvr */
KMETA | KCTRL | 'E', ebcdicmode, MSG_ebcdic_mode, SSRCH | SRPLC, /* pvr */
KMETA | KCTRL | 'H', hexmode, MSG_hex_mode, SSRCH | SRPLC, /* pvr */
KMETA | KCTRL | 'K', delbunit, MSG_back_del_unit, SMOD | SSIZE | SSRCH | SRPLC,
KMETA | KCTRL | 'O', octalmode, MSG_octal_mode, SSRCH | SRPLC, /* pvr */
KMETA | KCTRL | 'S', n_way_split, MSG_n_split, 0, /* pvr */
KMETA | KCTRL | 'V', showversion, MSG_display_version, 0,
KMETA | KCTRL | 'W', showsavebuf, MSG_show_save_buf, 0,
KMETA | '1', dispsize1, MSG_unit_size1, SSRCH | SRPLC,/* pvr */
KMETA | '2', dispsize2, MSG_unit_size2, SSRCH | SRPLC,/* pvr */
KMETA | '4', dispsize4, MSG_unit_size4, SSRCH | SRPLC,/* pvr */
KMETA | '!', reposition, MSG_reposition_window, 0,
KMETA | '.', setmark, MSG_set_mark, 0,
KMETA | '>', gotoeob, MSG_goto_eob, SSRCH | SRPLC,
KMETA | '<', gotobob, MSG_goto_bob, SSRCH | SRPLC,
KMETA | '+', next_buf, MSG_next_buff, 0,
KMETA | '-', prev_buf, MSG_prev_buff, 0,
KMETA | '%', queryrepl, MSG_query_replace, SMOD,
KMETA | '?', wallchart, MSG_display_bindings, 0,
KMETA | 'A', autosave, MSG_auto_save, 0,
KMETA | 'B', backunit, MSG_back_unit, SSRCH | SRPLC,
KMETA | 'C', compare, MSG_compare, 0,
KMETA | 'D', delfunit, MSG_forw_del_unit, SMOD | SSIZE | SSRCH | SRPLC,
KMETA | 'F', forwunit, MSG_forw_unit, SSRCH | SRPLC,
KMETA | 'G', use_buffer, MSG_use_buffer_split, 0,
KMETA | 'K', bindtokey, MSG_bind_to_key, 0,
KMETA | 'L', linkwind, MSG_link_windows, 0,
KMETA | 'O', save_region, MSG_save_region, 0,
KMETA | 'P', print, MSG_print, 0,
KMETA | 'R', backsearch, MSG_back_search, 0,
KMETA | 'S', forwsearch, MSG_forw_search, 0,
KMETA | 'T', searchagain, MSG_search_again, 0,
KMETA | 'U', file_visit, MSG_file_visit_split, 0,
KMETA | 'V', backpage, MSG_back_page, SRPLC,
KMETA | 'W', copyregion, MSG_copy_region, 0,
KMETA | 'X', extend, MSG_extended_command, 0,
KMETA | 'Y', yank_buffer, MSG_yank_buffer, SMOD | SSIZE,
KMETA | 'Z', mvupwind, MSG_up_window, 0
};
#define NKEY (sizeof(key) / sizeof(key[0]))
/*
* Symbol table lookup.
* Return a pointer to the SYMBOL node, or NULL if
* the symbol is not found.
*/
SYMBOL * symlookup (cp)
register char *cp;
{
register SYMBOL * sp;
sp = symbol[symhash (cp)];
while (sp != NULL)
{
if (strcmp (cp, sp -> s_name) == 0)
return (sp);
sp = sp -> s_symp;
}
return (NULL);
}
/*
* Take a string, and compute the symbol table
* bucket number. This is done by adding all of the characters
* together, and taking the sum mod NSHASH. The string probably
* should not contain any GR characters; if it does the "*cp"
* may get a nagative number on some machines, and the "%"
* will return a negative number!
*/
int symhash (cp)
register char *cp;
{
register int c;
register int n;
n = 0;
while ((c = *cp++) != 0)
n += c;
return (n % NSHASH);
}
/*
* Build initial keymap. The funny keys
* (commands, odd control characters) are mapped using
* a big table and calls to "keyadd". The printing characters
* are done with some do-it-yourself handwaving. The terminal
* specific keymap initialization code is called at the
* very end to finish up. All errors are fatal.
*/
void keymapinit ()
{
register SYMBOL * sp;
register KEY * kp;
register int i;
for (i = 0; i < NKEYS; ++i)
binding[i] = NULL;
for (kp = &key[0]; kp < &key[NKEY]; ++kp)
keyadd (kp -> k_key, (bool (*)()) kp -> k_funcp, kp -> k_name, kp -> k_modify);
keydup (KCTLX | KCTRL | 'G', MSG_abort);
keydup (KMETA | KCTRL | 'G', MSG_abort);
keydup (0x7F, MSG_back_del_char);
keydup (KMETA | 'Q', MSG_quote);
keydup (KMETA | 0x7F, MSG_back_del_unit);
/*
* Should be bound by "tab" already.
*/
if ((sp = symlookup (MSG_ins_self)) == NULL)
abort ();
for (i = 0x20; i < 0x7F; ++i)
{
if (binding[i] != NULL)
abort ();
binding[i] = sp;
++sp -> s_nkey;
}
ttykeymapinit ();
}
/*
* Create a new builtin function "name"
* with function "funcp". If the "new" is a real
* key, bind it as a side effect. All errors
* are fatal.
*/
void keyadd (new, funcp, name, modify)
int new, modify;
bool (*funcp) ();
char *name;
{
register SYMBOL * sp;
register int hash;
if ((sp = (SYMBOL *) malloc (sizeof (SYMBOL))) == NULL)
abort ();
hash = symhash (name);
sp -> s_symp = symbol[hash];
symbol[hash] = sp;
sp -> s_nkey = 0;
sp -> s_name = name;
sp -> s_funcp = funcp;
sp -> s_modify = modify;
if (new >= 0)
{
/* Bind this key. */
if (binding[new] != NULL)
abort ();
binding[new] = sp;
++sp -> s_nkey;
}
}
/*
* Bind key "new" to the existing
* routine "name". If the name cannot be found,
* or the key is already bound, abort.
*/
void keydup (new, name)
register int new;
char *name;
{
register SYMBOL * sp;
if (binding[new] != NULL || (sp = symlookup (name)) == NULL)
{
printf (MSG_no_f_tb, name);
abort ();
}
binding[new] = sp;
++sp -> s_nkey;
}