ref: 78cf847bfbb3aa5f78713fb47200070c5605d5ef
dir: /sys/src/cmd/dict/mkindex.c/
#include <u.h> #include <libc.h> #include <bio.h> #include "dict.h" /* * Use this to start making an index for a new dictionary. * Get the dictionary-specific nextoff and printentry(_,'h') * commands working, add a record to the dicts[] array below, * and run this program to get a list of offset,headword * pairs */ Biobuf boutbuf; Biobuf *bdict; Biobuf *bout = &boutbuf; int linelen; int breaklen = 2000; int outinhibit; int debug; Dict *dict; /* current dictionary */ Entry getentry(long); void usage(void) { fprint(2, "usage: %s [-D] [-d dictname]\n", argv0); exits("usage"); } void main(int argc, char **argv) { int i; long a, ae; char *p; Entry e; Binit(&boutbuf, 1, OWRITE); dict = &dicts[0]; ARGBEGIN { case 'd': p = EARGF(usage()); dict = 0; for(i=0; dicts[i].name; i++) { if(strcmp(p, dicts[i].name)==0) { dict = &dicts[i]; break; } } if(dict == nil) { err("unknown dictionary: %s", p); exits("nodict"); } break; case 'D': debug++; break; default: usage(); }ARGEND USED(argc,argv); bdict = Bopen(dict->path, OREAD); if(!bdict) { err("can't open dictionary %s", dict->path); exits("nodict"); } ae = Bseek(bdict, 0, 2); for(a = 0; a < ae; a = (*dict->nextoff)(a+1)) { linelen = 0; e = getentry(a); Bprint(bout, "%ld\t", a); linelen = 4; /* only has to be approx right */ (*dict->printentry)(e, 'h'); } exits(0); } Entry getentry(long b) { long e, n, dtop; static Entry ans; static int anslen = 0; e = (*dict->nextoff)(b+1); ans.doff = b; if(e < 0) { dtop = Bseek(bdict, 0L, 2); if(b < dtop) { e = dtop; } else { err("couldn't seek to entry"); ans.start = 0; ans.end = 0; } } n = e-b; if(n) { if(n > anslen) { if((ans.start = realloc(ans.start, n)) == nil) sysfatal("realloc: %r"); anslen = n; } Bseek(bdict, b, 0); n = Bread(bdict, ans.start, n); ans.end = ans.start + n; } return ans; }