723 lines
16 KiB
C
Executable File
723 lines
16 KiB
C
Executable File
/* ex.c */
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/* Author:
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* Steve Kirkendall
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* 14407 SW Teal Blvd. #C
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* Beaverton, OR 97005
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* kirkenda@cs.pdx.edu
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*/
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/* This file contains the code for reading ex commands. */
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#include "config.h"
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#include "ctype.h"
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#include "vi.h"
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/* This data type is used to describe the possible argument combinations */
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typedef short ARGT;
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#define FROM 1 /* allow a linespec */
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#define TO 2 /* allow a second linespec */
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#define BANG 4 /* allow a ! after the command name */
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#define EXTRA 8 /* allow extra args after command name */
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#define XFILE 16 /* expand wildcards in extra part */
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#define NOSPC 32 /* no spaces allowed in the extra part */
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#define DFLALL 64 /* default file range is 1,$ */
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#define DFLNONE 128 /* no default file range */
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#define NODFL 256 /* do not default to the current file name */
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#define EXRCOK 512 /* can be in a .exrc file */
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#define NL 1024 /* if mode!=MODE_EX, then write a newline first */
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#define PLUS 2048 /* allow a line number, as in ":e +32 foo" */
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#define ZERO 4096 /* allow 0 to be given as a line number */
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#define NOBAR 8192 /* treat following '|' chars as normal */
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#define FILES (XFILE + EXTRA) /* multiple extra files allowed */
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#define WORD1 (EXTRA + NOSPC) /* one extra word allowed */
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#define FILE1 (FILES + NOSPC) /* 1 file allowed, defaults to current file */
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#define NAMEDF (FILE1 + NODFL) /* 1 file allowed, defaults to "" */
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#define NAMEDFS (FILES + NODFL) /* multiple files allowed, default is "" */
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#define RANGE (FROM + TO) /* range of linespecs allowed */
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#define NONE 0 /* no args allowed at all */
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/* This array maps ex command names to command codes. The order in which
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* command names are listed below is significant -- ambiguous abbreviations
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* are always resolved to be the first possible match. (e.g. "r" is taken
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* to mean "read", not "rewind", because "read" comes before "rewind")
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*/
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static struct
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{
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char *name; /* name of the command */
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CMD code; /* enum code of the command */
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void (*fn)();/* function which executes the command */
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ARGT argt; /* command line arguments permitted/needed/used */
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}
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cmdnames[] =
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{ /* cmd name cmd code function arguments */
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{"append", CMD_APPEND, cmd_append, FROM+ZERO+BANG },
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#ifdef DEBUG
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{"bug", CMD_DEBUG, cmd_debug, RANGE+BANG+EXTRA+NL},
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#endif
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{"change", CMD_CHANGE, cmd_append, RANGE+BANG },
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{"delete", CMD_DELETE, cmd_delete, RANGE+WORD1 },
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{"edit", CMD_EDIT, cmd_edit, BANG+FILE1+PLUS },
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{"file", CMD_FILE, cmd_file, NAMEDF },
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{"global", CMD_GLOBAL, cmd_global, RANGE+BANG+EXTRA+DFLALL+NOBAR},
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{"insert", CMD_INSERT, cmd_append, FROM+BANG },
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{"join", CMD_INSERT, cmd_join, RANGE+BANG },
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{"k", CMD_MARK, cmd_mark, FROM+WORD1 },
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{"list", CMD_LIST, cmd_print, RANGE+NL },
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{"move", CMD_MOVE, cmd_move, RANGE+EXTRA },
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{"next", CMD_NEXT, cmd_next, BANG+NAMEDFS },
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{"Next", CMD_PREVIOUS, cmd_next, BANG },
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{"print", CMD_PRINT, cmd_print, RANGE+NL },
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{"quit", CMD_QUIT, cmd_xit, BANG },
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{"read", CMD_READ, cmd_read, FROM+ZERO+NAMEDF},
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{"substitute", CMD_SUBSTITUTE, cmd_substitute, RANGE+EXTRA },
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{"to", CMD_COPY, cmd_move, RANGE+EXTRA },
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{"undo", CMD_UNDO, cmd_undo, NONE },
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{"vglobal", CMD_VGLOBAL, cmd_global, RANGE+EXTRA+DFLALL+NOBAR},
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{"write", CMD_WRITE, cmd_write, RANGE+BANG+FILE1+DFLALL},
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{"xit", CMD_XIT, cmd_xit, BANG+NL },
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{"yank", CMD_YANK, cmd_delete, RANGE+WORD1 },
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{"!", CMD_BANG, cmd_shell, EXRCOK+RANGE+NAMEDFS+DFLNONE+NL+NOBAR},
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{"#", CMD_NUMBER, cmd_print, RANGE+NL },
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{"<", CMD_SHIFTL, cmd_shift, RANGE },
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{">", CMD_SHIFTR, cmd_shift, RANGE },
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{"=", CMD_EQUAL, cmd_file, RANGE },
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{"&", CMD_SUBAGAIN, cmd_substitute, RANGE },
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#ifndef NO_AT
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{"@", CMD_AT, cmd_at, EXTRA },
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#endif
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#ifndef NO_ABBR
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{"abbreviate", CMD_ABBR, cmd_map, EXRCOK+BANG+EXTRA},
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#endif
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{"args", CMD_ARGS, cmd_args, EXRCOK+NAMEDFS },
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#ifndef NO_ERRLIST
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{"cc", CMD_CC, cmd_make, BANG+FILES },
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#endif
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{"cd", CMD_CD, cmd_cd, EXRCOK+BANG+NAMEDF},
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{"copy", CMD_COPY, cmd_move, RANGE+EXTRA },
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#ifndef NO_DIGRAPH
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{"digraph", CMD_DIGRAPH, cmd_digraph, EXRCOK+BANG+EXTRA},
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#endif
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#ifndef NO_ERRLIST
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{"errlist", CMD_ERRLIST, cmd_errlist, BANG+NAMEDF },
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#endif
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{"ex", CMD_EDIT, cmd_edit, BANG+FILE1 },
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{"mark", CMD_MARK, cmd_mark, FROM+WORD1 },
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#ifndef NO_MKEXRC
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{"mkexrc", CMD_MKEXRC, cmd_mkexrc, NAMEDF },
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#endif
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{"number", CMD_NUMBER, cmd_print, RANGE+NL },
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{"put", CMD_PUT, cmd_put, FROM+ZERO+WORD1 },
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{"set", CMD_SET, cmd_set, EXRCOK+EXTRA },
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{"shell", CMD_SHELL, cmd_shell, NL },
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{"source", CMD_SOURCE, cmd_source, EXRCOK+NAMEDF },
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#ifdef SIGTSTP
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{"stop", CMD_STOP, cmd_suspend, NONE },
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#endif
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{"tag", CMD_TAG, cmd_tag, BANG+WORD1 },
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{"version", CMD_VERSION, cmd_version, EXRCOK+NONE },
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{"visual", CMD_VISUAL, cmd_edit, BANG+NAMEDF },
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{"wq", CMD_WQUIT, cmd_xit, NL },
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#ifdef DEBUG
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{"debug", CMD_DEBUG, cmd_debug, RANGE+BANG+EXTRA+NL},
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{"validate", CMD_VALIDATE, cmd_validate, BANG+NL },
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#endif
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{"chdir", CMD_CD, cmd_cd, EXRCOK+BANG+NAMEDF},
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#ifndef NO_COLOR
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{"color", CMD_COLOR, cmd_color, EXRCOK+EXTRA },
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#endif
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#ifndef NO_ERRLIST
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{"make", CMD_MAKE, cmd_make, BANG+NAMEDFS },
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#endif
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{"map", CMD_MAP, cmd_map, EXRCOK+BANG+EXTRA},
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{"previous", CMD_PREVIOUS, cmd_next, BANG },
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{"rewind", CMD_REWIND, cmd_next, BANG },
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#ifdef SIGTSTP
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{"suspend", CMD_SUSPEND, cmd_suspend, NONE },
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#endif
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{"unmap", CMD_UNMAP, cmd_map, EXRCOK+BANG+EXTRA},
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#ifndef NO_ABBR
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{"unabbreviate",CMD_UNABBR, cmd_map, EXRCOK+WORD1 },
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#endif
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{(char *)0}
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};
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/* This function parses a search pattern - given a pointer to a / or ?,
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* it replaces the ending / or ? with a \0, and returns a pointer to the
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* stuff that came after the pattern.
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*/
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char *parseptrn(ptrn)
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REG char *ptrn;
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{
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REG char *scan;
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for (scan = ptrn + 1;
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*scan && *scan != *ptrn;
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scan++)
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{
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/* allow backslashed versions of / and ? in the pattern */
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if (*scan == '\\' && scan[1] != '\0')
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{
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scan++;
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}
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}
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if (*scan)
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{
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*scan++ = '\0';
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}
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return scan;
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}
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/* This function parses a line specifier for ex commands */
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char *linespec(s, markptr)
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REG char *s; /* start of the line specifier */
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MARK *markptr; /* where to store the mark's value */
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{
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long num;
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REG char *t;
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/* parse each ;-delimited clause of this linespec */
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do
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{
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/* skip an initial ';', if any */
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if (*s == ';')
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{
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s++;
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}
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/* skip leading spaces */
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while (isspace(*s))
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{
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s++;
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}
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/* dot means current position */
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if (*s == '.')
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{
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s++;
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*markptr = cursor;
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}
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/* '$' means the last line */
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else if (*s == '$')
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{
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s++;
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*markptr = MARK_LAST;
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}
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/* digit means an absolute line number */
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else if (isdigit(*s))
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{
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for (num = 0; isdigit(*s); s++)
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{
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num = num * 10 + *s - '0';
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}
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*markptr = MARK_AT_LINE(num);
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}
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/* appostrophe means go to a set mark */
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else if (*s == '\'')
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{
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s++;
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*markptr = m_tomark(cursor, 1L, (int)*s);
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s++;
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}
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/* slash means do a search */
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else if (*s == '/' || *s == '?')
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{
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/* put a '\0' at the end of the search pattern */
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t = parseptrn(s);
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/* search for the pattern */
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*markptr &= ~(BLKSIZE - 1);
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if (*s == '/')
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{
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pfetch(markline(*markptr));
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if (plen > 0)
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*markptr += plen - 1;
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*markptr = m_fsrch(*markptr, s);
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}
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else
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{
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*markptr = m_bsrch(*markptr, s);
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}
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/* adjust command string pointer */
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s = t;
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}
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/* if linespec was faulty, quit now */
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if (!*markptr)
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{
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return s;
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}
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/* maybe add an offset */
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t = s;
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if (*t == '-' || *t == '+')
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{
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s++;
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for (num = 0; isdigit(*s); s++)
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{
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num = num * 10 + *s - '0';
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}
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if (num == 0)
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{
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num = 1;
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}
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*markptr = m_updnto(*markptr, num, *t);
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}
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} while (*s == ';' || *s == '+' || *s == '-');
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/* protect against invalid line numbers */
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num = markline(*markptr);
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if (num < 1L || num > nlines)
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{
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msg("Invalid line number -- must be from 1 to %ld", nlines);
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*markptr = MARK_UNSET;
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}
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return s;
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}
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/* This function reads an ex command and executes it. */
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void ex()
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{
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char cmdbuf[150];
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REG int cmdlen;
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static long oldline;
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significant = FALSE;
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oldline = markline(cursor);
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while (mode == MODE_EX)
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{
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/* read a line */
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#ifdef CRUNCH
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cmdlen = vgets(':', cmdbuf, sizeof(cmdbuf));
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#else
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cmdlen = vgets(*o_prompt ? ':' : '\0', cmdbuf, sizeof(cmdbuf));
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#endif
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if (cmdlen < 0)
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{
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return;
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}
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/* if empty line, assume ".+1" */
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if (cmdlen == 0)
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{
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strcpy(cmdbuf, ".+1");
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qaddch('\r');
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clrtoeol();
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}
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else
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{
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addch('\n');
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}
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refresh();
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/* parse & execute the command */
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doexcmd(cmdbuf);
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/* handle autoprint */
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if (significant || markline(cursor) != oldline)
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{
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significant = FALSE;
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oldline = markline(cursor);
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if (*o_autoprint && mode == MODE_EX)
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{
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cmd_print(cursor, cursor, CMD_PRINT, FALSE, "");
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}
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}
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}
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}
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void doexcmd(cmdbuf)
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char *cmdbuf; /* string containing an ex command */
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{
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REG char *scan; /* used to scan thru cmdbuf */
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MARK frommark; /* first linespec */
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MARK tomark; /* second linespec */
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REG int cmdlen; /* length of the command name given */
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CMD cmd; /* what command is this? */
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ARGT argt; /* argument types for this command */
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short forceit; /* bang version of a command? */
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REG int cmdidx; /* index of command */
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REG char *build; /* used while copying filenames */
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int iswild; /* boolean: filenames use wildcards? */
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int isdfl; /* using default line ranges? */
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int didsub; /* did we substitute file names for % or # */
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/* ex commands can't be undone via the shift-U command */
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U_line = 0L;
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/* permit extra colons at the start of the line */
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for (; *cmdbuf == ':'; cmdbuf++)
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{
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}
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/* ignore command lines that start with a double-quote */
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if (*cmdbuf == '"')
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{
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return;
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}
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scan = cmdbuf;
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/* parse the line specifier */
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if (nlines < 1)
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{
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/* no file, so don't allow addresses */
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}
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else if (*scan == '%')
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{
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/* '%' means all lines */
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frommark = MARK_FIRST;
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tomark = MARK_LAST;
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scan++;
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}
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else if (*scan == '0')
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{
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frommark = tomark = MARK_UNSET;
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scan++;
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}
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else
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{
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frommark = cursor;
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scan = linespec(scan, &frommark);
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tomark = frommark;
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if (frommark && *scan == ',')
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{
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scan++;
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scan = linespec(scan, &tomark);
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}
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if (!tomark)
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{
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/* faulty line spec -- fault already described */
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return;
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}
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if (frommark > tomark)
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{
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msg("first address exceeds the second");
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return;
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}
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}
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isdfl = (scan == cmdbuf);
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/* skip whitespace */
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while (isspace(*scan))
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{
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scan++;
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}
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/* if no command, then just move the cursor to the mark */
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if (!*scan)
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{
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if (tomark != MARK_UNSET)
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cursor = tomark;
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return;
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}
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/* figure out how long the command name is */
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if (!isalpha(*scan))
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{
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cmdlen = 1;
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}
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else
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{
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for (cmdlen = 1;
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isalpha(scan[cmdlen]);
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cmdlen++)
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{
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}
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}
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/* lookup the command code */
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for (cmdidx = 0;
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cmdnames[cmdidx].name && strncmp(scan, cmdnames[cmdidx].name, cmdlen);
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cmdidx++)
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{
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}
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argt = cmdnames[cmdidx].argt;
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cmd = cmdnames[cmdidx].code;
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if (cmd == CMD_NULL)
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{
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msg("Unknown command \"%.*s\"", cmdlen, scan);
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return;
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}
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/* !!! if the command doesn't have NOBAR set, then replace | with \0 */
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/* if the command ended with a bang, set the forceit flag */
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scan += cmdlen;
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if ((argt & BANG) && *scan == '!')
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{
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scan++;
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forceit = 1;
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}
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else
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{
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forceit = 0;
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}
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/* skip any more whitespace, to leave scan pointing to arguments */
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while (isspace(*scan))
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{
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scan++;
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}
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/* a couple of special cases for filenames */
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if (argt & XFILE)
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{
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/* if names were given, process them */
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if (*scan)
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{
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for (build = tmpblk.c, iswild = didsub = FALSE; *scan; scan++)
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{
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switch (*scan)
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{
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case '\\':
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if (scan[1] == '\\' || scan[1] == '%' || scan[1] == '#')
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{
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*build++ = *++scan;
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}
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else
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{
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*build++ = '\\';
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}
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break;
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case '%':
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if (!*origname)
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{
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msg("No filename to substitute for %%");
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return;
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}
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strcpy(build, origname);
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while (*build)
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{
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build++;
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}
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didsub = TRUE;
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break;
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case '#':
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if (!*prevorig)
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{
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msg("No filename to substitute for #");
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return;
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}
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strcpy(build, prevorig);
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while (*build)
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{
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build++;
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}
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didsub = TRUE;
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break;
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case '*':
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case '?':
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#if !(MSDOS || TOS)
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case '[':
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case '`':
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case '{': /* } */
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case '$':
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case '~':
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#endif
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*build++ = *scan;
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iswild = TRUE;
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break;
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default:
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*build++ = *scan;
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}
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}
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*build = '\0';
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if (cmd == CMD_BANG
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|| cmd == CMD_READ && tmpblk.c[0] == '!'
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|| cmd == CMD_WRITE && tmpblk.c[0] == '!')
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{
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if (didsub)
|
|
{
|
|
if (mode != MODE_EX)
|
|
{
|
|
addch('\n');
|
|
}
|
|
addstr(tmpblk.c);
|
|
addch('\n');
|
|
exrefresh();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (iswild && tmpblk.c[0] != '>')
|
|
{
|
|
scan = wildcard(tmpblk.c);
|
|
}
|
|
}
|
|
}
|
|
else /* no names given, maybe assume origname */
|
|
{
|
|
if (!(argt & NODFL))
|
|
{
|
|
strcpy(tmpblk.c, origname);
|
|
}
|
|
else
|
|
{
|
|
*tmpblk.c = '\0';
|
|
}
|
|
}
|
|
|
|
scan = tmpblk.c;
|
|
}
|
|
|
|
/* bad arguments? */
|
|
if (!(argt & EXRCOK) && nlines < 1L)
|
|
{
|
|
msg("Can't use the \"%s\" command in a %s file", cmdnames[cmdidx].name, EXRC);
|
|
return;
|
|
}
|
|
if (!(argt & (ZERO | EXRCOK)) && frommark == MARK_UNSET)
|
|
{
|
|
msg("Can't use address 0 with \"%s\" command.", cmdnames[cmdidx].name);
|
|
return;
|
|
}
|
|
if (!(argt & FROM) && frommark != cursor && nlines >= 1L)
|
|
{
|
|
msg("Can't use address with \"%s\" command.", cmdnames[cmdidx].name);
|
|
return;
|
|
}
|
|
if (!(argt & TO) && tomark != frommark && nlines >= 1L)
|
|
{
|
|
msg("Can't use a range with \"%s\" command.", cmdnames[cmdidx].name);
|
|
return;
|
|
}
|
|
if (!(argt & EXTRA) && *scan)
|
|
{
|
|
msg("Extra characters after \"%s\" command.", cmdnames[cmdidx].name);
|
|
return;
|
|
}
|
|
if ((argt & NOSPC) && !(cmd == CMD_READ && (forceit || *scan == '!')))
|
|
{
|
|
build = scan;
|
|
#ifndef CRUNCH
|
|
if ((argt & PLUS) && *build == '+')
|
|
{
|
|
while (*build && !isspace(*build))
|
|
{
|
|
build++;
|
|
}
|
|
while (*build && isspace(*build))
|
|
{
|
|
build++;
|
|
}
|
|
}
|
|
#endif /* not CRUNCH */
|
|
for (; *build; build++)
|
|
{
|
|
if (isspace(*build))
|
|
{
|
|
msg("Too many %s to \"%s\" command.",
|
|
(argt & XFILE) ? "filenames" : "arguments",
|
|
cmdnames[cmdidx].name);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* some commands have special default ranges */
|
|
if (isdfl && (argt & DFLALL))
|
|
{
|
|
frommark = MARK_FIRST;
|
|
tomark = MARK_LAST;
|
|
}
|
|
else if (isdfl && (argt & DFLNONE))
|
|
{
|
|
frommark = tomark = 0L;
|
|
}
|
|
|
|
/* write a newline if called from visual mode */
|
|
if ((argt & NL) && mode != MODE_EX && !exwrote)
|
|
{
|
|
addch('\n');
|
|
exrefresh();
|
|
}
|
|
|
|
/* act on the command */
|
|
(*cmdnames[cmdidx].fn)(frommark, tomark, cmd, forceit, scan);
|
|
}
|
|
|
|
|
|
/* This function executes EX commands from a file. It returns 1 normally, or
|
|
* 0 if the file could not be opened for reading.
|
|
*/
|
|
int doexrc(filename)
|
|
char *filename; /* name of a ".exrc" file */
|
|
{
|
|
int fd; /* file descriptor */
|
|
int len; /* length of the ".exrc" file */
|
|
|
|
/* !!! kludge: we use U_text as the buffer. This has the side-effect
|
|
* of interfering with the shift-U visual command. Disable shift-U.
|
|
*/
|
|
U_line = 0L;
|
|
|
|
/* open the file, read it, and close */
|
|
fd = open(filename, O_RDONLY);
|
|
if (fd < 0)
|
|
{
|
|
return 0;
|
|
}
|
|
len = tread(fd, U_text, BLKSIZE);
|
|
close(fd);
|
|
|
|
/* execute the string */
|
|
exstring(U_text, len, ctrl('V'));
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* This function executes EX commands from a string. The commands may be
|
|
* separated by newlines or by | characters. It also handles quoting.
|
|
* Each individual command is limited to 132 bytes, but the total string
|
|
* may be longer.
|
|
*/
|
|
void exstring(buf, len, qchar)
|
|
char *buf; /* the commands to execute */
|
|
int len; /* the length of the string */
|
|
int qchar; /* the quote character -- ^V for file, or \ for kbd */
|
|
{
|
|
char single[133]; /* a single command */
|
|
char *src, *dest;
|
|
int i;
|
|
|
|
/* find & do each command */
|
|
for (src = buf; src < &buf[len]; src++)
|
|
{
|
|
/* Copy a single command into single[]. Convert any quoted |
|
|
* into a normal |, and stop at a newline or unquoted |.
|
|
*/
|
|
for (dest = single, i = 0;
|
|
i < 132 && src < &buf[len] && *src != '\n' && *src != '|';
|
|
src++, i++)
|
|
{
|
|
if (src[0] == qchar && src[1] == '|')
|
|
{
|
|
src++;
|
|
}
|
|
*dest++ = *src;
|
|
}
|
|
*dest = '\0';
|
|
|
|
/* do it */
|
|
doexcmd(single);
|
|
}
|
|
}
|