From 35c8b969679577b3de1d5b020365f1325515142a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ilja=20Karta=C5=A1ov?= <elias@lowenware.com>
Date: Wed, 19 Jun 2019 21:04:31 +0200
Subject: [PATCH] Add string module

---
 string.c | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 string.h |  61 ++++++++++++++++++++++++++++++++
 2 files changed, 165 insertions(+)
 create mode 100644 string.c
 create mode 100644 string.h

diff --git a/string.c b/string.c
new file mode 100644
index 0000000..67c956d
--- /dev/null
+++ b/string.c
@@ -0,0 +1,104 @@
+/******************************************************************************
+ *
+ *                Copyright (c) 2017-2019 by Löwenware Ltd
+ *             Please, refer LICENSE file for legal information
+ *
+ ******************************************************************************/
+
+/**
+ * @file string.c
+ * @author Ilja Kartašov <ik@lowenware.com>
+ * @brief cStuff string module implementation
+ *
+ * @see https://lowenware.com/
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "string.h"
+
+int
+cstuff_strcpy(char **out, const char *in)
+{
+	return cstuff_strncpy(out, in, strlen(in));
+}
+
+
+int
+cstuff_strncpy(char **out, const char *in, int len)
+{
+	char *s;
+ 
+	if (!(s = malloc( len + 1 )))
+		return -1;
+
+	strncpy(s, in, len);
+	s[len]=0;
+
+	*out = s;
+
+	return len;
+}
+
+
+int
+cstuff_strset(char **out, const char *in)
+{
+	return cstuff_strnset(out, in, strlen(in));
+}
+
+
+int
+cstuff_strnset(char **out, const char *in, int len)
+{
+	char *s;
+
+	if (!(s = realloc(*out, len+1)))
+		return -1;
+
+	strncpy(s, in, len);
+	s[len] = 0;
+
+	*out = s;
+
+	return len;
+}
+
+
+int
+cstuff_sprintf(char **out, const char *format, ...)
+{
+	int result;
+	va_list vl;
+
+	va_start(vl, format);
+	result = cstuff_vsprintf(out, format, vl);
+	va_end(vl);
+
+	return result;
+}
+
+
+int
+cstuff_vsprintf(char **out, const char *format, va_list args)
+{
+	int result;
+	va_list vc;
+	char tmp, *s;
+
+	va_copy(vc, args);
+	result = vsnprintf(&tmp, 1, format, vc);
+	va_end(vc);
+
+	if (!(s = malloc(result + 1)))
+		return -1;
+
+	*out = s;
+	result = vsnprintf(s, result+1, format, args); 
+
+	return result;
+}
+
diff --git a/string.h b/string.h
new file mode 100644
index 0000000..a5cd9c7
--- /dev/null
+++ b/string.h
@@ -0,0 +1,61 @@
+/******************************************************************************
+ *
+ *                Copyright (c) 2017-2019 by Löwenware Ltd
+ *             Please, refer LICENSE file for legal information
+ *
+ ******************************************************************************/
+
+/**
+ * @file string.h
+ * @author Ilja Kartašov <ik@lowenware.com>
+ * @brief String module declarations
+ *
+ * @see https://lowenware.com/
+ */
+
+#ifndef CSTUFF_STRING_H_938B242C_B750_40E9_8B67_A69F2F37EB87
+#define CSTUFF_STRING_H_938B242C_B750_40E9_8B67_A69F2F37EB87
+
+#include <stdarg.h>
+#include "retcode.h"
+
+
+/** @brief Copies in string to newly allocated out buffer
+ *  @param out a pointer to an address where new pointer must be stored
+ *  @param in an input string
+ *  @return length of string or -1 if out of memory
+ */
+int
+cstuff_strcpy(char **out, const char *in);
+
+
+int
+cstuff_strncpy(char **out, const char *in, int len);
+
+
+/** @brief Overwrites content of out buffer with in string using realloc
+ *  @param out a pointer to an address where new string must be stored
+ *  @param in an input string
+ *  @return length of string or -1 if out of memory
+ */
+int
+cstuff_strset(char **out, const char *in);
+
+
+int
+cstuff_strnset(char **out, const char *in, int len);
+
+
+/** @brief Allocates memory and prints a formatted string into it
+ *  @param out a pointer to an address where new string must be stored
+ *  @param format a format for string (see manual for stdlib sprintf)
+ *  @return length of string or -1 if out of memory
+ */
+int
+cstuff_sprintf(char **out, const char *format, ...);
+
+
+int
+cstuff_vsprintf(char **out, const char *format, va_list args);
+
+#endif /* !CSTUFF_STRING_H */