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- /*
- e screen editor
-
- (C) G. Nigel Gilbert, MICROLOGY, 1981
-
- August-December 1981
-
- FILE: e4
-
- FUNCTIONS: findorrep,dofindrep,find
-
- PURPOSE: perform find, alter and repeat commands
-
- */
-
- #include "e.h"
-
- findorrep()
- {
- int toend, global, i, count;
- char c, *p;
-
- putmess("Find? ");
- global=nocheck=toend=nocase=NO;
- findir=1;
- count=0;
- c=scans(patt,FLIM);
- if (replace) {
- if (c == ESCKEY) return;
- putmess("Alter to? ");
- c=scans(changeto,FLIM);
- }
- else if (!patt[0]) return;
- if (c == CR) {
- if (replace)
- putmess("B|ackwards/|G|lobally/|T|o end (start)/|I|gnore case/|W|ithout asking/number|? ");
- else putmess("B|ackwards/|I|gnore case/number of times|? ");
- if (scans(opts,5) == ESCKEY) return;
- for (i=0; (c=opts[i]); i++) {
- switch(tolower(c)) {
- case 'g' :
- global=YES;
- case 't' :
- toend=YES;
- break;
- case 'b' :
- findir=-1;
- break;
- case 'w' :
- nocheck=YES;
- break;
- case 'i' :
- nocase=YES;
- for (p=patt; *p; p++)
- *p=tolower(*p);
- break;
- }
- if (c >= '0' && c <= '9') count=count*10+c-'0';
- }
- if (!replace) {
- global=NO;
- toend=NO;
- }
- if (count == 0) {
- if (toend) count=MAXINT;
- else count=1;
- }
- if (global) {
- findir=1;
- moveline(1-cline);
- sync(0);
- }
- }
- else count=1;
- dofindrep(count);
- }
-
- dofindrep(count)
- int count;
- {
- int cp, i, len;
- char c, testlow();
-
- puttext();
- do {
- count--;
- if (find() == FAIL) count=0;
- else if (replace) {
- if (nocheck) c='y';
- else {
- gotoxy(EMPOS,0);
- puts(" Replace |{|Y|/|N|}|? ");
- do {
- gotoxy(REPPOS,0);
- for (i=0; i < CURSORWAIT; i++);
- resetcursor();
- for (i=0; i < CURSORWAIT; i++);
- }
- while ((c=testlow()) != 'y' && c != 'n'
- && c != ESCKEY);
- }
- deleteline(EMPOS,0);
- switch(c) {
- case 'y' :
- if (strlen(text)+(len=strlen(patt)) >= LLIM) {
- error("Line would be too long");
- return;
- }
- for (cp=charn; (text[cp]=text[cp+len]); cp++);
- for (cp=strlen(text), len=strlen(changeto);
- cp >= charn; cp--)
- text[cp+len]=text[cp];
- for (i=0; (c=changeto[i]); i++) text[charn++]=c;
- altered=YES;
- puttext();
- rewrite(++cp,cursorx);
- sync(charn);
- break;
- case ESCKEY:
- count=0;
- error("Search stopped");
- case 'n' :
- movechar(findir);
- break;
- }
- }
- }
- while(count);
- inbufp=0;
- }
-
- find() /*find 'patt', searching back (findir==-1) or forwards (1) from
- current line. Return FAIL or YES, and set current line to
- that containing pattern*/
- {
- int fline, oldcharn, newcharn, interupt, linecount, pos;
- char *s, pattch1, *p, *t, *getline(), testkey(), lcline[LLIM];
-
- if (!replace || repeat) movechar(findir);
- fline=cline;
- oldcharn=charn;
- interupt=NO;
- linecount= cline%100;
- pattch1=patt[0];
- gotoxy(WAITPOS,0);
- if (findir == 1)
- while (fline <= lastl) {
- if (linecount++ == 100) {
- linecount=1;
- putlineno(fline);
- gotoxy(WAITPOS,0);
- if (testkey() == ESCKEY) {
- interupt=YES;
- goto interrupted;
- }
- }
- s=getline(fline)+charn;
- if (nocase) {
- for (t=lcline; (*t=tolower(*s & NOPARITY));
- s++, t++);
- s=lcline;
- }
- if ( (pos=index(s,patt)) != FAIL) {
- charn+=pos;
- goto foundit;
- }
- fline++;
- charn=0;
- }
- else
- while (fline >= 1) {
- if (linecount-- == 0) {
- linecount=99;
- putlineno(fline);
- gotoxy(WAITPOS,0);
- if (testkey() == ESCKEY) {
- interupt=YES;
- goto interrupted;
- }
- }
- s=getline(fline);
- if (nocase) {
- for (t=lcline; (*t=tolower(*s)); s++, t++);
- s=lcline;
- }
- for (; charn >= 0; charn--)
- if (*(p=&s[charn]) == pattch1) {
- for (t=patt+1,p++; *t && *p == *t; p++, t++);
- if (!*t) goto foundit;
- }
- charn=strlen(getline(--fline))-1;
- }
- interrupted:
- charn=oldcharn;
- if (!replace || repeat) movechar(-findir);
- if (interupt) {
- error("Search aborted");
- putlineno(cline);
- }
- else error(" Search fails");
- return FAIL;
-
- foundit:
- newcharn=charn;
- moveline(fline-cline);
- sync(charn=newcharn);
- return YES;
- }
- ; (c=changeto[i]); i++) text[charn++]=c;
- altered=YES;
- puttext();
- rewrite(++cp,cursorx);
- sync(