X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=libecoli%2Fecoli_string.c;fp=libecoli%2Fecoli_string.c;h=77238181350e33d72297069cd7eab53d91564060;hb=90efcb0b905753a2eac864bc1a869781d7c31919;hp=0000000000000000000000000000000000000000;hpb=dec2d7fa17ae1e8b3d1dec8e396d057757baf4f3;p=protos%2Flibecoli.git

diff --git a/libecoli/ecoli_string.c b/libecoli/ecoli_string.c
new file mode 100644
index 0000000..7723818
--- /dev/null
+++ b/libecoli/ecoli_string.c
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2016, Olivier MATZ <zer0@droids-corp.org>
+ */
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <ecoli_assert.h>
+#include <ecoli_malloc.h>
+#include <ecoli_string.h>
+
+/* count the number of identical chars at the beginning of 2 strings */
+size_t ec_strcmp_count(const char *s1, const char *s2)
+{
+	size_t i = 0;
+
+	while (s1[i] && s2[i] && s1[i] == s2[i])
+		i++;
+
+	return i;
+}
+
+int ec_str_startswith(const char *s, const char *beginning)
+{
+	size_t len;
+
+	len = ec_strcmp_count(s, beginning);
+	if (beginning[len] == '\0')
+		return 1;
+
+	return 0;
+}
+
+int ec_vasprintf(char **buf, const char *fmt, va_list ap)
+{
+	char dummy;
+	int buflen, ret;
+	va_list aq;
+
+	va_copy(aq, ap);
+	*buf = NULL;
+	ret = vsnprintf(&dummy, 1, fmt, aq);
+	va_end(aq);
+	if (ret < 0)
+		return ret;
+
+	buflen = ret + 1;
+	*buf = ec_malloc(buflen);
+	if (*buf == NULL)
+		return -1;
+
+	va_copy(aq, ap);
+	ret = vsnprintf(*buf, buflen, fmt, aq);
+	va_end(aq);
+
+	ec_assert_print(ret < buflen, "invalid return value for vsnprintf");
+	if (ret < 0) {
+		free(*buf);
+		*buf = NULL;
+		return -1;
+	}
+
+	return ret;
+}
+
+int ec_asprintf(char **buf, const char *fmt, ...)
+{
+	va_list ap;
+	int ret;
+
+	va_start(ap, fmt);
+	ret = ec_vasprintf(buf, fmt, ap);
+	va_end(ap);
+
+	return ret;
+}