add dict

src/cmd/dict/slang.c

@@ -0,0 +1,203 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include "dict.h"
+
+/* Possible tags */
+enum {
+	DF,		/* definition */
+	DX,		/* definition/example */
+	ET,		/* etymology */
+	EX,		/* example */
+	LA,		/* label */
+	ME,		/* main entry */
+	NU,		/* sense number */
+	PR,		/* pronunciation */
+	PS,		/* grammar part */
+	XR,		/* cross reference */
+	XX,		/* cross reference (whole entry) */
+};
+
+/* Assoc tables must be sorted on first field */
+
+static Assoc tagtab[] = {
+	{"df",	DF},
+	{"dx",	DX},
+	{"et",	ET},
+	{"ex",	EX},
+	{"la",	LA},
+	{"me",	ME},
+	{"nu",	NU},
+	{"pr",	PR},
+	{"ps",	PS},
+	{"xr",	XR},
+	{"xx",	XX},
+};
+static long	sget(char *, char *, char **, char **);
+static void	soutpiece(char *, char *);
+
+void
+slangprintentry(Entry e, int cmd)
+{
+	char *p, *pe, *vs, *ve;
+	long t;
+
+	p = e.start;
+	pe = e.end;
+	if(cmd == 'h') {
+		t = sget(p, pe, &vs, &ve);
+		if(t == ME)
+			soutpiece(vs, ve);
+		outnl(0);
+		return;
+	}
+	while(p < pe) {
+		switch(sget(p, pe, &vs, &ve)) {
+		case DF:
+			soutpiece(vs, ve);
+			outchars(".  ");
+			break;
+		case DX:
+			soutpiece(vs, ve);
+			outchars(".  ");
+			break;
+		case ET:
+			outchars("[");
+			soutpiece(vs, ve);
+			outchars("] ");
+			break;
+		case EX:
+			outchars("E.g., ");
+			soutpiece(vs, ve);
+			outchars(".  ");
+			break;
+		case LA:
+			outchars("(");
+			soutpiece(vs, ve);
+			outchars(") ");
+			break;
+		case ME:
+			outnl(0);
+			soutpiece(vs, ve);
+			outnl(0);
+			break;
+		case NU:
+			outnl(2);
+			soutpiece(vs, ve);
+			outchars(".  ");
+			break;
+		case PR:
+			outchars("[");
+			soutpiece(vs, ve);
+			outchars("] ");
+			break;
+		case PS:
+			outnl(1);
+			soutpiece(vs, ve);
+			outchars(". ");
+			break;
+		case XR:
+			outchars("See ");
+			soutpiece(vs, ve);
+			outchars(".  ");
+			break;
+		case XX:
+			outchars("See ");
+			soutpiece(vs, ve);
+			outchars(".  ");
+			break;
+		default:
+			ve = pe;	/* will end loop */
+			break;
+		}
+		p = ve;
+	}
+	outnl(0);
+}
+
+long
+slangnextoff(long fromoff)
+{
+	long a;
+	char *p;
+
+	a = Bseek(bdict, fromoff, 0);
+	if(a < 0)
+		return -1;
+	for(;;) {
+		p = Brdline(bdict, '\n');
+		if(!p)
+			break;
+		if(p[0] == 'm' && p[1] == 'e' && p[2] == ' ')
+			return (Boffset(bdict)-Blinelen(bdict));
+	}
+	return -1;
+}
+
+void
+slangprintkey(void)
+{
+	Bprint(bout, "No key\n");
+}
+
+/*
+ * Starting from b, find next line beginning with a tag.
+ * Don't go past e, but assume *e==0.
+ * Return tag value, or -1 if no more tags before e.
+ * Set pvb to beginning of value (after tag).
+ * Set pve to point at newline that ends the value.
+ */
+static long
+sget(char *b, char *e, char **pvb, char **pve)
+{
+	char *p;
+	char buf[3];
+	long t, tans;
+
+	buf[2] = 0;
+	tans = -1;
+	for(p = b;;) {
+		if(p[2] == ' ') {
+			buf[0] = p[0];
+			buf[1] = p[1];
+			t = lookassoc(tagtab, asize(tagtab), buf);
+			if(t < 0) {
+				if(debug)
+					err("tag %s\n", buf);
+				p += 3;
+			} else {
+				if(tans < 0) {
+					p += 3;
+					tans = t;
+					*pvb = p;
+				} else {
+					*pve = p;
+					break;
+				}
+			}
+		}
+		p = strchr(p, '\n');
+		if(!p || ++p >= e) {
+			if(tans >= 0)
+				*pve = e-1;
+			break;
+		}
+	}
+	return tans;
+}
+
+static void
+soutpiece(char *b, char *e)
+{
+	int c, lastc;
+
+	lastc = 0;
+	while(b < e) {
+		c = *b++;
+		if(c == '\n')
+			c = ' ';
+		if(!(c == ' ' && lastc == ' ') && c != '@')
+			outchar(c);
+		lastc = c;
+	}
+}