sed: Can't open /usr/web/plan9/sources.html #include "sam.h" void moveto(File *f, Range r) { Posn p1 = r.p1, p2 = r.p2; f->dot.r.p1 = p1; f->dot.r.p2 = p2; if(f->rasp){ telldot(f); outTsl(Hmoveto, f->tag, f->dot.r.p1); } } void telldot(File *f) { if(f->rasp == 0) panic("telldot"); if(f->dot.r.p1==f->tdot.p1 && f->dot.r.p2==f->tdot.p2) return; outTsll(Hsetdot, f->tag, f->dot.r.p1, f->dot.r.p2); f->tdot = f->dot.r; } void tellpat(void) { outTS(Hsetpat, &lastpat); patset = FALSE; } #define CHARSHIFT 128 void lookorigin(File *f, Posn p0, Posn ls) { int nl, nc, c; Posn p, oldp0; if(p0 > f->nc) p0 = f->nc; oldp0 = p0; p = p0; for(nl=nc=c=0; c!=-1 && nl<ls && nc<ls*CHARSHIFT; nc++) if((c=filereadc(f, --p)) == '\n'){ nl++; oldp0 = p0-nc; } if(c == -1) p0 = 0; else if(nl==0){ if(p0>=CHARSHIFT/2) p0-=CHARSHIFT/2; else p0 = 0; }else p0 = oldp0; outTsl(Horigin, f->tag, p0); } int alnum(int c) { /* * Hard to get absolutely right. Use what we know about ASCII * and assume anything above the Latin control characters is * potentially an alphanumeric. */ if(c<=' ') return 0; if(0x7F<=c && c<=0xA0) return 0; if(utfrune("!\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~", c)) return 0; return 1; } int clickmatch(File *f, int cl, int cr, int dir, Posn *p) { int c; int nest = 1; for(;;){ if(dir > 0){ if(*p >= f->nc) break; c = filereadc(f, (*p)++); }else{ if(*p == 0) break; c = filereadc(f, --(*p)); } if(c == cr){ if(--nest==0) return 1; }else if(c == cl) nest++; } return cl=='\n' && nest==1; } Rune* strrune(Rune *s, Rune c) { Rune c1; if(c == 0) { while(*s++) ; return s-1; } while(c1 = *s++) if(c1 == c) return s-1; return 0; } void doubleclick(File *f, Posn p1) { int c, i; Rune *r, *l; Posn p; if(p1 > f->nc) return; f->dot.r.p1 = f->dot.r.p2 = p1; for(i=0; left[i]; i++){ l = left[i]; r = right[i]; /* try left match */ p = p1; if(p1 == 0) c = '\n'; else c = filereadc(f, p - 1); if(strrune(l, c)){ if(clickmatch(f, c, r[strrune(l, c)-l], 1, &p)){ f->dot.r.p1 = p1; f->dot.r.p2 = p-(c!='\n'); } return; } /* try right match */ p = p1; if(p1 == f->nc) c = '\n'; else c = filereadc(f, p); if(strrune(r, c)){ if(clickmatch(f, c, l[strrune(r, c)-r], -1, &p)){ f->dot.r.p1 = p; if(c!='\n' || p!=0 || filereadc(f, 0)=='\n') f->dot.r.p1++; f->dot.r.p2 = p1+(p1<f->nc && c=='\n'); } return; } } /* try filling out word to right */ p = p1; while(p < f->nc && alnum(filereadc(f, p++))) f->dot.r.p2++; /* try filling out word to left */ p = p1; while(--p >= 0 && alnum(filereadc(f, p))) f->dot.r.p1--; } sed: Can't open /usr/web/plan9/sources.html