qpkg: added some field names and relational operators from Ubuntu

- gobble.c (gobble_buf): recognize (and ignore) the following fields:
  Bugs, Installed-Size, MD5sum, Origin, Original-Maintainer, SHA1, SHA256,
  Task.
- pkg.h (enum relop): added comments showing the respective symbol
- pkg.h (enum relop): added rel_gg (>>), rel_le (<=), and rel_ll (<<)
- gobble.c (gobble_buf): recognize >>, <=, and <<
- TODO: record progress in support beyond Jlime/OE

qpkg/TODO

@@ -135,6 +135,8 @@ Still left to do
 - consider also supporting the similar but not identical (parent ?) format
   of /var/lib/dpkg/status and /var/lib/apt/lists/*Packages
 
+  Update: added as much as my Ubuntu system can reach before hitting |
+
 
 Done
 ====

qpkg/gobble.c

@@ -161,6 +161,10 @@ initial:
 			FAIL;
 		}
 
+	case 'B':	/* Bugs */
+		EXPECT("ugs:");
+		goto skip_data;
+
 	case 'C':	/* Conflicts // Conffiles  */
 		EXPECT("onf");
 		switch (NEXT) {
@@ -202,28 +206,63 @@ initial:
 			FAIL;
 		}
 
-	case 'I':	/* Installed-Time */
-		EXPECT("nstalled-Time:");
-		goto skip_data;
-
-	case 'L':	/* License */
-		EXPECT("icense:");
-		goto skip_data;
-
-	case 'M':	/* Maintainer, MD5Sum */
+	case 'I':	/* Installed-Size, Installed-Time */
+		EXPECT("nstalled-");
 		switch (NEXT) {
-		case 'a':
-			EXPECT("intainer:");
+		case 'S':
+			EXPECT("ize:");
 			goto skip_data;
-		case 'D':
-			EXPECT("5Sum:");
+		case 'T':
+			EXPECT("ime:");
 			goto skip_data;
 		default:
 			FAIL;
 		}
 
-	case 'O':	/* OE */
-		EXPECT("E:");
+	case 'L':	/* License */
+		EXPECT("icense:");
+		goto skip_data;
+
+	case 'M':	/* Maintainer, MD5Sum, MD5sum */
+		switch (NEXT) {
+		case 'a':
+			EXPECT("intainer:");
+			goto skip_data;
+		case 'D':
+			EXPECT("5");
+			switch (NEXT) {
+			case 'S':
+			case 's':
+				break;
+			default:
+				FAIL;
+			}
+			EXPECT("um:");
+			goto skip_data;
+		default:
+			FAIL;
+		}
+
+	case 'O':	/* OE, Origin, Original-Maintainer */
+		switch (NEXT) {
+		case 'E':
+			EXPECT(":");
+			goto skip_data;
+		case 'r':
+			EXPECT("igin");
+			switch (NEXT) {
+			case ':':
+				break;
+			case 'a':
+				EXPECT("l-Maintainer:");
+				break;
+			default:
+				FAIL;
+			}
+			goto skip_data;
+		default:
+			FAIL;
+		}
 		goto skip_data;
 
 	case 'P':	/* Package, Priority, Provides */
@@ -260,11 +299,25 @@ initial:
 			FAIL;
 		}
 
-	case 'S':	/* Section, Size, Source, Suggests // Status */
+	case 'S':	/* Section, SHA1, SHA256, Size, Source, Suggests
+			   // Status */
 		switch (NEXT) {
 		case 'e':
 			EXPECT("ction:");
 			goto skip_data;
+		case 'H':
+			EXPECT("A");
+			switch (NEXT) {
+			case '1':
+				EXPECT(":");
+				break;
+			case '2':
+				EXPECT("56:");
+				break;
+			default:
+				FAIL;
+			}
+			goto skip_data;
 		case 'i':
 			EXPECT("ze:");
 			goto skip_data;
@@ -281,6 +334,10 @@ initial:
 			FAIL;
 		}
 
+	case 'T':	/* Task */
+		EXPECT("ask:");
+		goto skip_data;
+
 	case 'V':	/* Version */
 		EXPECT("ersion:");
 		goto version;
@@ -389,18 +446,36 @@ list_with_version:
 			ref->version = NULL;
 		else {
 			buf++;
-			if (buf == end)
-				FAIL;
-			switch (*buf++) {
+			switch (NEXT) {
 			case '=':
 				ref->relop = rel_eq;
 				break;
 			case '<':
-				ref->relop = rel_lt;
+				switch (NEXT) {
+				case ' ':
+					ref->relop = rel_lt;
+					break;
+				case '=':
+					ref->relop = rel_le;
+					break;
+				case '<':
+					ref->relop = rel_ll;
+					break;
+				default:
+					buf--;
+				}
 				break;
 			case '>':
-				EXPECT("=");
-				ref->relop = rel_ge;
+				switch (NEXT) {
+				case '=':
+					ref->relop = rel_ge;
+					break;
+				case '>':
+					ref->relop = rel_gg;
+					break;
+				default:
+					FAIL;
+				}
 				break;
 			default:
 				FAIL;

qpkg/pkg.h

@@ -28,9 +28,12 @@ enum flags {
 };
 
 enum relop {
-	rel_eq,
-	rel_ge,
-	rel_lt,
+	rel_eq,		/* =  */
+	rel_ge,		/* >= */
+	rel_gg,		/* >> */
+	rel_lt,		/* <  */
+	rel_le,		/* <= */
+	rel_ll,		/* << */
 };
 
 struct pkg;