reorganize sources

[protos/libecoli.git] / libecoli / ecoli_string.c

diff --git a/libecoli/ecoli_string.c b/libecoli/ecoli_string.c
new file mode 100644 (file)
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;
+}