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