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/* move3.c */
/* Author:
* Steve Kirkendall
* 14407 SW Teal Blvd. #C
* Beaverton, OR 97005
* kirkenda@cs.pdx.edu
*/
/* This file contains movement functions that perform character searches */
#include "config.h"
#include "vi.h"
#ifndef NO_CHARSEARCH
static MARK (*prevfwdfn)(); /* function to search in same direction */
static MARK (*prevrevfn)(); /* function to search in opposite direction */
static char prev_key; /* sought cvhar from previous [fFtT] */
MARK m__ch(m, cnt, cmd)
MARK m; /* current position */
long cnt;
char cmd; /* command: either ',' or ';' */
{
MARK (*tmp)();
if (!prevfwdfn)
{
msg("No previous f, F, t, or T command");
return MARK_UNSET;
}
if (cmd == ',')
{
m = (*prevrevfn)(m, cnt, prev_key);
/* Oops! we didn't want to change the prev*fn vars! */
tmp = prevfwdfn;
prevfwdfn = prevrevfn;
prevrevfn = tmp;
return m;
}
else
{
return (*prevfwdfn)(m, cnt, prev_key);
}
}
/* move forward within this line to next occurrence of key */
MARK m_fch(m, cnt, key)
MARK m; /* where to search from */
long cnt;
char key; /* what to search for */
{
REG char *text;
DEFAULT(1);
prevfwdfn = m_fch;
prevrevfn = m_Fch;
prev_key = key;
pfetch(markline(m));
text = ptext + markidx(m);
while (cnt-- > 0)
{
do
{
m++;
text++;
} while (*text && *text != key);
}
if (!*text)
{
return MARK_UNSET;
}
return m;
}
/* move backward within this line to previous occurrence of key */
MARK m_Fch(m, cnt, key)
MARK m; /* where to search from */
long cnt;
char key; /* what to search for */
{
REG char *text;
DEFAULT(1);
prevfwdfn = m_Fch;
prevrevfn = m_fch;
prev_key = key;
pfetch(markline(m));
text = ptext + markidx(m);
while (cnt-- > 0)
{
do
{
m--;
text--;
} while (text >= ptext && *text != key);
}
if (text < ptext)
{
return MARK_UNSET;
}
return m;
}
/* move forward within this line almost to next occurrence of key */
MARK m_tch(m, cnt, key)
MARK m; /* where to search from */
long cnt;
char key; /* what to search for */
{
/* skip the adjacent char */
pfetch(markline(m));
if (plen <= markidx(m))
{
return MARK_UNSET;
}
m++;
m = m_fch(m, cnt, key);
if (m == MARK_UNSET)
{
return MARK_UNSET;
}
prevfwdfn = m_tch;
prevrevfn = m_Tch;
return m - 1;
}
/* move backward within this line almost to previous occurrence of key */
MARK m_Tch(m, cnt, key)
MARK m; /* where to search from */
long cnt;
char key; /* what to search for */
{
/* skip the adjacent char */
if (markidx(m) == 0)
{
return MARK_UNSET;
}
m--;
m = m_Fch(m, cnt, key);
if (m == MARK_UNSET)
{
return MARK_UNSET;
}
prevfwdfn = m_Tch;
prevrevfn = m_tch;
return m + 1;
}
#endif
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