moving software to separate submodules part 1

desktop/.dmenu/patch/navhistory.c

@@ -0,0 +1,126 @@
+static char *histfile;
+static char **history;
+static size_t histsz, histpos;
+
+static void
+loadhistory(void)
+{
+	FILE *fp = NULL;
+	static size_t cap = 0;
+	size_t llen;
+	char *line;
+
+	if (!histfile) {
+		return;
+	}
+
+	fp = fopen(histfile, "r");
+	if (!fp) {
+		return;
+	}
+
+	for (;;) {
+		line = NULL;
+		llen = 0;
+		if (-1 == getline(&line, &llen, fp)) {
+			if (ferror(fp)) {
+				die("failed to read history");
+			}
+			free(line);
+			break;
+		}
+
+		if (cap == histsz) {
+			cap += 64 * sizeof(char*);
+			history = realloc(history, cap);
+			if (!history) {
+				die("failed to realloc memory");
+			}
+		}
+		strtok(line, "\n");
+		history[histsz] = line;
+		histsz++;
+	}
+	histpos = histsz;
+
+	if (fclose(fp)) {
+		die("failed to close file %s", histfile);
+	}
+}
+
+static void
+navhistory(int dir)
+{
+	static char def[BUFSIZ];
+	char *p = NULL;
+	size_t len = 0;
+
+	if (!history || histpos + 1 == 0)
+		return;
+
+	if (histsz == histpos) {
+		strncpy(def, text, sizeof(def));
+	}
+
+	switch(dir) {
+	case 1:
+		if (histpos < histsz - 1) {
+			p = history[++histpos];
+		} else if (histpos == histsz - 1) {
+			p = def;
+			histpos++;
+		}
+		break;
+	case -1:
+		if (histpos > 0) {
+			p = history[--histpos];
+		}
+		break;
+	}
+	if (p == NULL) {
+		return;
+	}
+
+	len = MIN(strlen(p), BUFSIZ - 1);
+	strncpy(text, p, len);
+	text[len] = '\0';
+	cursor = len;
+	match();
+}
+
+static void
+savehistory(char *input)
+{
+	unsigned int i;
+	FILE *fp;
+
+	if (!histfile ||
+	    0 == maxhist ||
+	    0 == strlen(input)) {
+		goto out;
+	}
+
+	fp = fopen(histfile, "w");
+	if (!fp) {
+		die("failed to open %s", histfile);
+	}
+	for (i = histsz < maxhist ? 0 : histsz - maxhist; i < histsz; i++) {
+		if (0 >= fprintf(fp, "%s\n", history[i])) {
+			die("failed to write to %s", histfile);
+		}
+	}
+	if (histsz == 0 || !histnodup || (histsz > 0 && strcmp(input, history[histsz-1]) != 0)) { /* TODO */
+		if (0 >= fputs(input, fp)) {
+			die("failed to write to %s", histfile);
+		}
+	}
+	if (fclose(fp)) {
+		die("failed to close file %s", histfile);
+	}
+
+out:
+	for (i = 0; i < histsz; i++) {
+		free(history[i]);
+	}
+	free(history);
+}