1 files changed, 100 insertions, 0 deletions
diff --git a/src/common.c b/src/common.c
new file mode 100644
index 0000000..1c057a2
--- /dev/null
+++ b/src/common.c
@@ -0,0 +1,100 @@
+/*
+Copyright (C) 2016  Paweł Redman
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 3
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
+*/
+
+#include "common.h"
+
+void vstr_init(vstr_t *vstr)
+{
+	memset(vstr, 0, sizeof(*vstr));
+}
+
+void vstr_free(vstr_t *vstr)
+{
+	free(vstr->data);
+}
+
+void vstr_clear(vstr_t *vstr)
+{
+	vstr->size = 0;
+}
+
+static int vstr_enlarge(vstr_t *vstr)
+{
+	size_t new_alloc;
+
+	new_alloc = (vstr->alloc + 4) * 3 / 2;
+	debug("%zu -> %zu\n", vstr->alloc, new_alloc);
+
+	vstr->data = realloc(vstr->data, new_alloc);
+	if (!vstr->data)
+		return 1;
+
+	vstr->alloc = new_alloc;
+	return 0;
+}
+
+int vstr_putc(vstr_t *vstr, char ch)
+{
+	// note: keep at least one character free at all times for vstr_termz
+	if (vstr->size + 2 > vstr->alloc)
+		if (vstr_enlarge(vstr))
+			return -ENOMEM;
+
+	vstr->data[vstr->size] = ch;
+	vstr->size++;
+	return 0;
+}
+
+int vstr_cmp(vstr_t *vstr, const char *str)
+{
+	size_t len;
+
+	len = strlen(str);
+	if (vstr->size < len)
+		len = vstr->size;
+
+	return memcmp(vstr->data, str, len);
+}
+
+char *vstr_strdup(vstr_t *vstr)
+{
+	char *str;
+
+	str = malloc(vstr->size + 1);
+	if (!str)
+		return NULL;
+
+	memcpy(str, vstr->data, vstr->size);
+	str[vstr->size] = 0;
+
+	return str;
+}
+
+void vstr_termz(vstr_t *vstr)
+{
+	vstr->data[vstr->size] = 0;
+}
+
+float vstr_atof(vstr_t *vstr)
+{
+	if (!vstr->size)
+		return 0;
+
+	vstr_termz(vstr);
+	return atof(vstr->data);
+}