added unset command

1 files changed, 34 insertions, 0 deletions

diff --git a/sm.c b/sm.c
index d4064c7..6358086 100644
--- a/sm.c
+++ b/sm.c
@@ -37,6 +37,7 @@ static int pladddoc(const char *, Document *);
 static int add(const char *);
 static int edit(const char *);
 static void list(const char *);
+static int unset(const char *, const char *);
 
 static Document **docdb;
 static int ndocdb;
@@ -93,6 +94,7 @@ dbdel(const char *filename)
 			plugins[i]->usedby = xrealloc(plugins[i]->usedby,
 					--plugins[i]->nusedby *
 					sizeof(*plugins[i]->usedby));
+			break;
 		}
 	}
 
@@ -365,6 +367,35 @@ list(const char *filename)
 	}
 }
 
+static int
+unset(const char *filename, const char *plname)
+{
+	Document *d;
+	int i, j;
+
+	if ((d = dbfind(filename)) == NULL) {
+		fprintf(stderr, "%s: no such file\n", filename);
+		return 0;
+	}
+	for (i = 0; i < NPLUGINS; i++) {
+		if (strcmp(plugins[i]->name, plname) != 0)
+			continue;
+		for (j = 0; j < plugins[i]->nusedby; j++) {
+			if (plugins[i]->usedby[j] != d)
+				continue;
+			if (j + 1 < plugins[i]->nusedby) {
+				memmove(&plugins[i]->usedby[j], &plugins[i]->usedby[j +
+						1], (plugins[i]->nusedby - j - 1) *
+						sizeof(*plugins[i]->usedby));
+			}
+			plugins[i]->usedby = xrealloc(plugins[i]->usedby,
+					--plugins[i]->nusedby *
+					sizeof(*plugins[i]->usedby));
+			return 1;
+		}
+	}
+	return 0;
+}
 
 
 int
@@ -435,6 +466,9 @@ editcmd:
 			}
 			if (pladddoc(cmd.argv[2], d))
 				dbwrite(kdbloc);
+		} else if (!strcmp(cmd.argv[0], "unset")) {
+			if (unset(cmd.argv[1], cmd.argv[2]))
+				dbwrite(kdbloc);
 		}
 	}
 	fputc('\n', stdout);