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getchar.c
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getchar.c
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/* vi:set ts=8 sts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* getchar.c
*
* functions related with getting a character from the user/mapping/redo/...
*
* manipulations with redo buffer and stuff buffer
* mappings and abbreviations
*/
#include "vim.h"
/*
* These buffers are used for storing:
* - stuffed characters: A command that is translated into another command.
* - redo characters: will redo the last change.
* - recorded chracters: for the "q" command.
*
* The bytes are stored like in the typeahead buffer:
* - K_SPECIAL introduces a special key (two more bytes follow). A literal
* K_SPECIAL is stored as K_SPECIAL KS_SPECIAL KE_FILLER.
* - CSI introduces a GUI termcap code (also when gui.in_use is FALSE,
* otherwise switching the GUI on would make mappings invalid).
* A literal CSI is stored as CSI KS_EXTRA KE_CSI.
* These translations are also done on multi-byte characters!
*
* Escaping CSI bytes is done by the system-specific input functions, called
* by ui_inchar().
* Escaping K_SPECIAL is done by inchar().
* Un-escaping is done by vgetc().
*/
#define MINIMAL_SIZE 20 /* minimal size for b_str */
static struct buffheader redobuff = {{NULL, {NUL}}, NULL, 0, 0};
static struct buffheader old_redobuff = {{NULL, {NUL}}, NULL, 0, 0};
#if defined(FEAT_AUTOCMD) || defined(FEAT_EVAL) || defined(PROTO)
static struct buffheader save_redobuff = {{NULL, {NUL}}, NULL, 0, 0};
static struct buffheader save_old_redobuff = {{NULL, {NUL}}, NULL, 0, 0};
#endif
static struct buffheader recordbuff = {{NULL, {NUL}}, NULL, 0, 0};
static int typeahead_char = 0; /* typeahead char that's not flushed */
/*
* when block_redo is TRUE redo buffer will not be changed
* used by edit() to repeat insertions and 'V' command for redoing
*/
static int block_redo = FALSE;
/*
* Make a hash value for a mapping.
* "mode" is the lower 4 bits of the State for the mapping.
* "c1" is the first character of the "lhs".
* Returns a value between 0 and 255, index in maphash.
* Put Normal/Visual mode mappings mostly separately from Insert/Cmdline mode.
*/
#define MAP_HASH(mode, c1) (((mode) & (NORMAL + VISUAL + SELECTMODE + OP_PENDING)) ? (c1) : ((c1) ^ 0x80))
/*
* Each mapping is put in one of the 256 hash lists, to speed up finding it.
*/
static mapblock_T *(maphash[256]);
static int maphash_valid = FALSE;
/*
* List used for abbreviations.
*/
static mapblock_T *first_abbr = NULL; /* first entry in abbrlist */
static int KeyNoremap = 0; /* remapping flags */
/*
* variables used by vgetorpeek() and flush_buffers()
*
* typebuf.tb_buf[] contains all characters that are not consumed yet.
* typebuf.tb_buf[typebuf.tb_off] is the first valid character.
* typebuf.tb_buf[typebuf.tb_off + typebuf.tb_len - 1] is the last valid char.
* typebuf.tb_buf[typebuf.tb_off + typebuf.tb_len] must be NUL.
* The head of the buffer may contain the result of mappings, abbreviations
* and @a commands. The length of this part is typebuf.tb_maplen.
* typebuf.tb_silent is the part where <silent> applies.
* After the head are characters that come from the terminal.
* typebuf.tb_no_abbr_cnt is the number of characters in typebuf.tb_buf that
* should not be considered for abbreviations.
* Some parts of typebuf.tb_buf may not be mapped. These parts are remembered
* in typebuf.tb_noremap[], which is the same length as typebuf.tb_buf and
* contains RM_NONE for the characters that are not to be remapped.
* typebuf.tb_noremap[typebuf.tb_off] is the first valid flag.
* (typebuf has been put in globals.h, because check_termcode() needs it).
*/
#define RM_YES 0 /* tb_noremap: remap */
#define RM_NONE 1 /* tb_noremap: don't remap */
#define RM_SCRIPT 2 /* tb_noremap: remap local script mappings */
#define RM_ABBR 4 /* tb_noremap: don't remap, do abbrev. */
/* typebuf.tb_buf has three parts: room in front (for result of mappings), the
* middle for typeahead and room for new characters (which needs to be 3 *
* MAXMAPLEN) for the Amiga).
*/
#define TYPELEN_INIT (5 * (MAXMAPLEN + 3))
static char_u typebuf_init[TYPELEN_INIT]; /* initial typebuf.tb_buf */
static char_u noremapbuf_init[TYPELEN_INIT]; /* initial typebuf.tb_noremap */
static int last_recorded_len = 0; /* number of last recorded chars */
static char_u *get_buffcont __ARGS((struct buffheader *, int));
static void add_buff __ARGS((struct buffheader *, char_u *, long n));
static void add_num_buff __ARGS((struct buffheader *, long));
static void add_char_buff __ARGS((struct buffheader *, int));
static int read_stuff __ARGS((int advance));
static void start_stuff __ARGS((void));
static int read_redo __ARGS((int, int));
static void copy_redo __ARGS((int));
static void init_typebuf __ARGS((void));
static void gotchars __ARGS((char_u *, int));
static void may_sync_undo __ARGS((void));
static void closescript __ARGS((void));
static int vgetorpeek __ARGS((int));
static void map_free __ARGS((mapblock_T **));
static void validate_maphash __ARGS((void));
static void showmap __ARGS((mapblock_T *mp, int local));
#ifdef FEAT_EVAL
static char_u *eval_map_expr __ARGS((char_u *str));
#endif
/*
* Free and clear a buffer.
*/
void
free_buff(buf)
struct buffheader *buf;
{
struct buffblock *p, *np;
for (p = buf->bh_first.b_next; p != NULL; p = np)
{
np = p->b_next;
vim_free(p);
}
buf->bh_first.b_next = NULL;
}
/*
* Return the contents of a buffer as a single string.
* K_SPECIAL and CSI in the returned string are escaped.
*/
static char_u *
get_buffcont(buffer, dozero)
struct buffheader *buffer;
int dozero; /* count == zero is not an error */
{
long_u count = 0;
char_u *p = NULL;
char_u *p2;
char_u *str;
struct buffblock *bp;
/* compute the total length of the string */
for (bp = buffer->bh_first.b_next; bp != NULL; bp = bp->b_next)
count += (long_u)STRLEN(bp->b_str);
if ((count || dozero) && (p = lalloc(count + 1, TRUE)) != NULL)
{
p2 = p;
for (bp = buffer->bh_first.b_next; bp != NULL; bp = bp->b_next)
for (str = bp->b_str; *str; )
*p2++ = *str++;
*p2 = NUL;
}
return (p);
}
/*
* Return the contents of the record buffer as a single string
* and clear the record buffer.
* K_SPECIAL and CSI in the returned string are escaped.
*/
char_u *
get_recorded()
{
char_u *p;
size_t len;
p = get_buffcont(&recordbuff, TRUE);
free_buff(&recordbuff);
/*
* Remove the characters that were added the last time, these must be the
* (possibly mapped) characters that stopped the recording.
*/
len = STRLEN(p);
if ((int)len >= last_recorded_len)
{
len -= last_recorded_len;
p[len] = NUL;
}
/*
* When stopping recording from Insert mode with CTRL-O q, also remove the
* CTRL-O.
*/
if (len > 0 && restart_edit != 0 && p[len - 1] == Ctrl_O)
p[len - 1] = NUL;
return (p);
}
/*
* Return the contents of the redo buffer as a single string.
* K_SPECIAL and CSI in the returned string are escaped.
*/
char_u *
get_inserted()
{
return get_buffcont(&redobuff, FALSE);
}
/*
* Add string "s" after the current block of buffer "buf".
* K_SPECIAL and CSI should have been escaped already.
*/
static void
add_buff(buf, s, slen)
struct buffheader *buf;
char_u *s;
long slen; /* length of "s" or -1 */
{
struct buffblock *p;
long_u len;
if (slen < 0)
slen = (long)STRLEN(s);
if (slen == 0) /* don't add empty strings */
return;
if (buf->bh_first.b_next == NULL) /* first add to list */
{
buf->bh_space = 0;
buf->bh_curr = &(buf->bh_first);
}
else if (buf->bh_curr == NULL) /* buffer has already been read */
{
EMSG(_("E222: Add to read buffer"));
return;
}
else if (buf->bh_index != 0)
mch_memmove(buf->bh_first.b_next->b_str,
buf->bh_first.b_next->b_str + buf->bh_index,
STRLEN(buf->bh_first.b_next->b_str + buf->bh_index) + 1);
buf->bh_index = 0;
if (buf->bh_space >= (int)slen)
{
len = (long_u)STRLEN(buf->bh_curr->b_str);
vim_strncpy(buf->bh_curr->b_str + len, s, (size_t)slen);
buf->bh_space -= slen;
}
else
{
if (slen < MINIMAL_SIZE)
len = MINIMAL_SIZE;
else
len = slen;
p = (struct buffblock *)lalloc((long_u)(sizeof(struct buffblock) + len),
TRUE);
if (p == NULL)
return; /* no space, just forget it */
buf->bh_space = (int)(len - slen);
vim_strncpy(p->b_str, s, (size_t)slen);
p->b_next = buf->bh_curr->b_next;
buf->bh_curr->b_next = p;
buf->bh_curr = p;
}
return;
}
/*
* Add number "n" to buffer "buf".
*/
static void
add_num_buff(buf, n)
struct buffheader *buf;
long n;
{
char_u number[32];
sprintf((char *)number, "%ld", n);
add_buff(buf, number, -1L);
}
/*
* Add character 'c' to buffer "buf".
* Translates special keys, NUL, CSI, K_SPECIAL and multibyte characters.
*/
static void
add_char_buff(buf, c)
struct buffheader *buf;
int c;
{
#ifdef FEAT_MBYTE
char_u bytes[MB_MAXBYTES + 1];
int len;
int i;
#endif
char_u temp[4];
#ifdef FEAT_MBYTE
if (IS_SPECIAL(c))
len = 1;
else
len = (*mb_char2bytes)(c, bytes);
for (i = 0; i < len; ++i)
{
if (!IS_SPECIAL(c))
c = bytes[i];
#endif
if (IS_SPECIAL(c) || c == K_SPECIAL || c == NUL)
{
/* translate special key code into three byte sequence */
temp[0] = K_SPECIAL;
temp[1] = K_SECOND(c);
temp[2] = K_THIRD(c);
temp[3] = NUL;
}
#ifdef FEAT_GUI
else if (c == CSI)
{
/* Translate a CSI to a CSI - KS_EXTRA - KE_CSI sequence */
temp[0] = CSI;
temp[1] = KS_EXTRA;
temp[2] = (int)KE_CSI;
temp[3] = NUL;
}
#endif
else
{
temp[0] = c;
temp[1] = NUL;
}
add_buff(buf, temp, -1L);
#ifdef FEAT_MBYTE
}
#endif
}
/*
* Get one byte from the stuff buffer.
* If advance == TRUE go to the next char.
* No translation is done K_SPECIAL and CSI are escaped.
*/
static int
read_stuff(advance)
int advance;
{
char_u c;
struct buffblock *curr;
if (stuffbuff.bh_first.b_next == NULL) /* buffer is empty */
return NUL;
curr = stuffbuff.bh_first.b_next;
c = curr->b_str[stuffbuff.bh_index];
if (advance)
{
if (curr->b_str[++stuffbuff.bh_index] == NUL)
{
stuffbuff.bh_first.b_next = curr->b_next;
vim_free(curr);
stuffbuff.bh_index = 0;
}
}
return c;
}
/*
* Prepare the stuff buffer for reading (if it contains something).
*/
static void
start_stuff()
{
if (stuffbuff.bh_first.b_next != NULL)
{
stuffbuff.bh_curr = &(stuffbuff.bh_first);
stuffbuff.bh_space = 0;
}
}
/*
* Return TRUE if the stuff buffer is empty.
*/
int
stuff_empty()
{
return (stuffbuff.bh_first.b_next == NULL);
}
/*
* Set a typeahead character that won't be flushed.
*/
void
typeahead_noflush(c)
int c;
{
typeahead_char = c;
}
/*
* Remove the contents of the stuff buffer and the mapped characters in the
* typeahead buffer (used in case of an error). If 'typeahead' is true,
* flush all typeahead characters (used when interrupted by a CTRL-C).
*/
void
flush_buffers(typeahead)
int typeahead;
{
init_typebuf();
start_stuff();
while (read_stuff(TRUE) != NUL)
;
if (typeahead) /* remove all typeahead */
{
/*
* We have to get all characters, because we may delete the first part
* of an escape sequence.
* In an xterm we get one char at a time and we have to get them all.
*/
while (inchar(typebuf.tb_buf, typebuf.tb_buflen - 1, 10L,
typebuf.tb_change_cnt) != 0)
;
typebuf.tb_off = MAXMAPLEN;
typebuf.tb_len = 0;
}
else /* remove mapped characters only */
{
typebuf.tb_off += typebuf.tb_maplen;
typebuf.tb_len -= typebuf.tb_maplen;
}
typebuf.tb_maplen = 0;
typebuf.tb_silent = 0;
cmd_silent = FALSE;
typebuf.tb_no_abbr_cnt = 0;
}
/*
* The previous contents of the redo buffer is kept in old_redobuffer.
* This is used for the CTRL-O <.> command in insert mode.
*/
void
ResetRedobuff()
{
if (!block_redo)
{
free_buff(&old_redobuff);
old_redobuff = redobuff;
redobuff.bh_first.b_next = NULL;
}
}
#if defined(FEAT_AUTOCMD) || defined(FEAT_EVAL) || defined(PROTO)
/*
* Save redobuff and old_redobuff to save_redobuff and save_old_redobuff.
* Used before executing autocommands and user functions.
*/
static int save_level = 0;
void
saveRedobuff()
{
char_u *s;
if (save_level++ == 0)
{
save_redobuff = redobuff;
redobuff.bh_first.b_next = NULL;
save_old_redobuff = old_redobuff;
old_redobuff.bh_first.b_next = NULL;
/* Make a copy, so that ":normal ." in a function works. */
s = get_buffcont(&save_redobuff, FALSE);
if (s != NULL)
{
add_buff(&redobuff, s, -1L);
vim_free(s);
}
}
}
/*
* Restore redobuff and old_redobuff from save_redobuff and save_old_redobuff.
* Used after executing autocommands and user functions.
*/
void
restoreRedobuff()
{
if (--save_level == 0)
{
free_buff(&redobuff);
redobuff = save_redobuff;
free_buff(&old_redobuff);
old_redobuff = save_old_redobuff;
}
}
#endif
/*
* Append "s" to the redo buffer.
* K_SPECIAL and CSI should already have been escaped.
*/
void
AppendToRedobuff(s)
char_u *s;
{
if (!block_redo)
add_buff(&redobuff, s, -1L);
}
/*
* Append to Redo buffer literally, escaping special characters with CTRL-V.
* K_SPECIAL and CSI are escaped as well.
*/
void
AppendToRedobuffLit(str, len)
char_u *str;
int len; /* length of "str" or -1 for up to the NUL */
{
char_u *s = str;
int c;
char_u *start;
if (block_redo)
return;
while (len < 0 ? *s != NUL : s - str < len)
{
/* Put a string of normal characters in the redo buffer (that's
* faster). */
start = s;
while (*s >= ' '
#ifndef EBCDIC
&& *s < DEL /* EBCDIC: all chars above space are normal */
#endif
&& (len < 0 || s - str < len))
++s;
/* Don't put '0' or '^' as last character, just in case a CTRL-D is
* typed next. */
if (*s == NUL && (s[-1] == '0' || s[-1] == '^'))
--s;
if (s > start)
add_buff(&redobuff, start, (long)(s - start));
if (*s == NUL || (len >= 0 && s - str >= len))
break;
/* Handle a special or multibyte character. */
#ifdef FEAT_MBYTE
if (has_mbyte)
/* Handle composing chars separately. */
c = mb_cptr2char_adv(&s);
else
#endif
c = *s++;
if (c < ' ' || c == DEL || (*s == NUL && (c == '0' || c == '^')))
add_char_buff(&redobuff, Ctrl_V);
/* CTRL-V '0' must be inserted as CTRL-V 048 (EBCDIC: xf0) */
if (*s == NUL && c == '0')
#ifdef EBCDIC
add_buff(&redobuff, (char_u *)"xf0", 3L);
#else
add_buff(&redobuff, (char_u *)"048", 3L);
#endif
else
add_char_buff(&redobuff, c);
}
}
/*
* Append a character to the redo buffer.
* Translates special keys, NUL, CSI, K_SPECIAL and multibyte characters.
*/
void
AppendCharToRedobuff(c)
int c;
{
if (!block_redo)
add_char_buff(&redobuff, c);
}
/*
* Append a number to the redo buffer.
*/
void
AppendNumberToRedobuff(n)
long n;
{
if (!block_redo)
add_num_buff(&redobuff, n);
}
/*
* Append string "s" to the stuff buffer.
* CSI and K_SPECIAL must already have been escaped.
*/
void
stuffReadbuff(s)
char_u *s;
{
add_buff(&stuffbuff, s, -1L);
}
void
stuffReadbuffLen(s, len)
char_u *s;
long len;
{
add_buff(&stuffbuff, s, len);
}
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* Stuff "s" into the stuff buffer, leaving special key codes unmodified and
* escaping other K_SPECIAL and CSI bytes.
*/
void
stuffReadbuffSpec(s)
char_u *s;
{
while (*s != NUL)
{
if (*s == K_SPECIAL && s[1] != NUL && s[2] != NUL)
{
/* Insert special key literally. */
stuffReadbuffLen(s, 3L);
s += 3;
}
else
#ifdef FEAT_MBYTE
stuffcharReadbuff(mb_ptr2char_adv(&s));
#else
stuffcharReadbuff(*s++);
#endif
}
}
#endif
/*
* Append a character to the stuff buffer.
* Translates special keys, NUL, CSI, K_SPECIAL and multibyte characters.
*/
void
stuffcharReadbuff(c)
int c;
{
add_char_buff(&stuffbuff, c);
}
/*
* Append a number to the stuff buffer.
*/
void
stuffnumReadbuff(n)
long n;
{
add_num_buff(&stuffbuff, n);
}
/*
* Read a character from the redo buffer. Translates K_SPECIAL, CSI and
* multibyte characters.
* The redo buffer is left as it is.
* if init is TRUE, prepare for redo, return FAIL if nothing to redo, OK
* otherwise
* if old is TRUE, use old_redobuff instead of redobuff
*/
static int
read_redo(init, old_redo)
int init;
int old_redo;
{
static struct buffblock *bp;
static char_u *p;
int c;
#ifdef FEAT_MBYTE
int n;
char_u buf[MB_MAXBYTES];
int i;
#endif
if (init)
{
if (old_redo)
bp = old_redobuff.bh_first.b_next;
else
bp = redobuff.bh_first.b_next;
if (bp == NULL)
return FAIL;
p = bp->b_str;
return OK;
}
if ((c = *p) != NUL)
{
/* Reverse the conversion done by add_char_buff() */
#ifdef FEAT_MBYTE
/* For a multi-byte character get all the bytes and return the
* converted character. */
if (has_mbyte && (c != K_SPECIAL || p[1] == KS_SPECIAL))
n = MB_BYTE2LEN_CHECK(c);
else
n = 1;
for (i = 0; ; ++i)
#endif
{
if (c == K_SPECIAL) /* special key or escaped K_SPECIAL */
{
c = TO_SPECIAL(p[1], p[2]);
p += 2;
}
#ifdef FEAT_GUI
if (c == CSI) /* escaped CSI */
p += 2;
#endif
if (*++p == NUL && bp->b_next != NULL)
{
bp = bp->b_next;
p = bp->b_str;
}
#ifdef FEAT_MBYTE
buf[i] = c;
if (i == n - 1) /* last byte of a character */
{
if (n != 1)
c = (*mb_ptr2char)(buf);
break;
}
c = *p;
if (c == NUL) /* cannot happen? */
break;
#endif
}
}
return c;
}
/*
* Copy the rest of the redo buffer into the stuff buffer (in a slow way).
* If old_redo is TRUE, use old_redobuff instead of redobuff.
* The escaped K_SPECIAL and CSI are copied without translation.
*/
static void
copy_redo(old_redo)
int old_redo;
{
int c;
while ((c = read_redo(FALSE, old_redo)) != NUL)
stuffcharReadbuff(c);
}
/*
* Stuff the redo buffer into the stuffbuff.
* Insert the redo count into the command.
* If "old_redo" is TRUE, the last but one command is repeated
* instead of the last command (inserting text). This is used for
* CTRL-O <.> in insert mode
*
* return FAIL for failure, OK otherwise
*/
int
start_redo(count, old_redo)
long count;
int old_redo;
{
int c;
/* init the pointers; return if nothing to redo */
if (read_redo(TRUE, old_redo) == FAIL)
return FAIL;
c = read_redo(FALSE, old_redo);
/* copy the buffer name, if present */
if (c == '"')
{
add_buff(&stuffbuff, (char_u *)"\"", 1L);
c = read_redo(FALSE, old_redo);
/* if a numbered buffer is used, increment the number */
if (c >= '1' && c < '9')
++c;
add_char_buff(&stuffbuff, c);
c = read_redo(FALSE, old_redo);
}
#ifdef FEAT_VISUAL
if (c == 'v') /* redo Visual */
{
VIsual = curwin->w_cursor;
VIsual_active = TRUE;
VIsual_select = FALSE;
VIsual_reselect = TRUE;
redo_VIsual_busy = TRUE;
c = read_redo(FALSE, old_redo);
}
#endif
/* try to enter the count (in place of a previous count) */
if (count)
{
while (VIM_ISDIGIT(c)) /* skip "old" count */
c = read_redo(FALSE, old_redo);
add_num_buff(&stuffbuff, count);
}
/* copy from the redo buffer into the stuff buffer */
add_char_buff(&stuffbuff, c);
copy_redo(old_redo);
return OK;
}
/*
* Repeat the last insert (R, o, O, a, A, i or I command) by stuffing
* the redo buffer into the stuffbuff.
* return FAIL for failure, OK otherwise
*/
int
start_redo_ins()
{
int c;
if (read_redo(TRUE, FALSE) == FAIL)
return FAIL;
start_stuff();
/* skip the count and the command character */
while ((c = read_redo(FALSE, FALSE)) != NUL)
{
if (vim_strchr((char_u *)"AaIiRrOo", c) != NULL)
{
if (c == 'O' || c == 'o')
stuffReadbuff(NL_STR);
break;
}
}
/* copy the typed text from the redo buffer into the stuff buffer */
copy_redo(FALSE);
block_redo = TRUE;
return OK;
}
void
stop_redo_ins()
{
block_redo = FALSE;
}
/*
* Initialize typebuf.tb_buf to point to typebuf_init.
* alloc() cannot be used here: In out-of-memory situations it would
* be impossible to type anything.
*/
static void
init_typebuf()
{
if (typebuf.tb_buf == NULL)
{
typebuf.tb_buf = typebuf_init;
typebuf.tb_noremap = noremapbuf_init;
typebuf.tb_buflen = TYPELEN_INIT;
typebuf.tb_len = 0;
typebuf.tb_off = 0;
typebuf.tb_change_cnt = 1;
}
}
/*
* insert a string in position 'offset' in the typeahead buffer (for "@r"
* and ":normal" command, vgetorpeek() and check_termcode())
*
* If noremap is REMAP_YES, new string can be mapped again.
* If noremap is REMAP_NONE, new string cannot be mapped again.
* If noremap is REMAP_SKIP, fist char of new string cannot be mapped again,
* but abbreviations are allowed.
* If noremap is REMAP_SCRIPT, new string cannot be mapped again, except for
* script-local mappings.
* If noremap is > 0, that many characters of the new string cannot be mapped.
*
* If nottyped is TRUE, the string does not return KeyTyped (don't use when
* offset is non-zero!).
*
* If silent is TRUE, cmd_silent is set when the characters are obtained.
*
* return FAIL for failure, OK otherwise
*/
int
ins_typebuf(str, noremap, offset, nottyped, silent)
char_u *str;
int noremap;
int offset;
int nottyped;
int silent;
{
char_u *s1, *s2;
int newlen;
int addlen;
int i;
int newoff;
int val;
int nrm;
init_typebuf();
if (++typebuf.tb_change_cnt == 0)
typebuf.tb_change_cnt = 1;
addlen = (int)STRLEN(str);
/*
* Easy case: there is room in front of typebuf.tb_buf[typebuf.tb_off]
*/
if (offset == 0 && addlen <= typebuf.tb_off)
{
typebuf.tb_off -= addlen;
mch_memmove(typebuf.tb_buf + typebuf.tb_off, str, (size_t)addlen);
}
/*
* Need to allocate a new buffer.
* In typebuf.tb_buf there must always be room for 3 * MAXMAPLEN + 4
* characters. We add some extra room to avoid having to allocate too
* often.
*/
else
{
newoff = MAXMAPLEN + 4;
newlen = typebuf.tb_len + addlen + newoff + 4 * (MAXMAPLEN + 4);
if (newlen < 0) /* string is getting too long */
{
EMSG(_(e_toocompl)); /* also calls flush_buffers */
setcursor();
return FAIL;
}
s1 = alloc(newlen);
if (s1 == NULL) /* out of memory */
return FAIL;
s2 = alloc(newlen);
if (s2 == NULL) /* out of memory */
{
vim_free(s1);
return FAIL;
}
typebuf.tb_buflen = newlen;
/* copy the old chars, before the insertion point */
mch_memmove(s1 + newoff, typebuf.tb_buf + typebuf.tb_off,
(size_t)offset);
/* copy the new chars */
mch_memmove(s1 + newoff + offset, str, (size_t)addlen);
/* copy the old chars, after the insertion point, including the NUL at
* the end */
mch_memmove(s1 + newoff + offset + addlen,
typebuf.tb_buf + typebuf.tb_off + offset,
(size_t)(typebuf.tb_len - offset + 1));
if (typebuf.tb_buf != typebuf_init)
vim_free(typebuf.tb_buf);
typebuf.tb_buf = s1;
mch_memmove(s2 + newoff, typebuf.tb_noremap + typebuf.tb_off,
(size_t)offset);
mch_memmove(s2 + newoff + offset + addlen,
typebuf.tb_noremap + typebuf.tb_off + offset,
(size_t)(typebuf.tb_len - offset));
if (typebuf.tb_noremap != noremapbuf_init)
vim_free(typebuf.tb_noremap);
typebuf.tb_noremap = s2;
typebuf.tb_off = newoff;
}
typebuf.tb_len += addlen;
/* If noremap == REMAP_SCRIPT: do remap script-local mappings. */
if (noremap == REMAP_SCRIPT)
val = RM_SCRIPT;
else if (noremap == REMAP_SKIP)
val = RM_ABBR;