/* str.h - XBT string related functions. */
-/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2007-2018. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#ifndef XBT_STR_H
#define XBT_STR_H
-#include <stdarg.h> /* va_* */
-#include "xbt/misc.h"
-#include "xbt/dynar.h"
-#include "xbt/dict.h"
-#include "simgrid_config.h" /* FILE for getline */
+#include <xbt/dict.h>
+#include <xbt/dynar.h>
+#include <xbt/misc.h>
+
+#include <stdarg.h> /* va_* */
SG_BEGIN_DECL()
/** @addtogroup XBT_str
* @brief String manipulation functions
*
- * This module defines several string related functions. We redefine some quite classical
- * functions on the platforms were they are not nativaly defined (such as getline() or
- * asprintf()), while some other are a bit more exotic.
+ * This module defines several string related functions. Looking at the diversity of string manipulation functions that
+ * are provided, you can see that several SimGrid core developers actually like Perl.
* @{
*/
-/* Trim related functions */
-XBT_PUBLIC(void) xbt_str_rtrim(char *s, const char *char_list);
-XBT_PUBLIC(void) xbt_str_ltrim(char *s, const char *char_list);
-XBT_PUBLIC(void) xbt_str_trim(char *s, const char *char_list);
-XBT_PUBLIC(xbt_dynar_t) xbt_str_split(const char *s, const char *sep);
-XBT_PUBLIC(xbt_dynar_t) xbt_str_split_quoted(const char *s);
-XBT_PUBLIC(xbt_dynar_t) xbt_str_split_quoted_in_place(char *s);
+XBT_PUBLIC xbt_dynar_t xbt_str_split(const char* s, const char* sep);
+XBT_PUBLIC xbt_dynar_t xbt_str_split_quoted(const char* s);
+XBT_PUBLIC xbt_dynar_t xbt_str_split_quoted_in_place(char* s);
+
+XBT_PUBLIC char* xbt_str_join_array(const char* const* strs, const char* sep);
-XBT_PUBLIC(xbt_dynar_t) xbt_str_split_str(const char *s, const char *sep);
+XBT_PUBLIC long int xbt_str_parse_int(const char* str, const char* error_mesg);
+XBT_PUBLIC double xbt_str_parse_double(const char* str, const char* error_mesg);
-XBT_PUBLIC(char *) xbt_str_join(xbt_dynar_t dynar, const char *sep);
-XBT_PUBLIC(char *) xbt_str_join_array(const char *const *strs, const char *sep);
+#define XBT_DJB2_HASH_FUNCTION
+//#define XBT_FNV_HASH_FUNCTION
-/* */
-XBT_PUBLIC(void) xbt_str_subst(char *str, char from, char to, int amount);
-XBT_PUBLIC(char *) xbt_str_varsubst(const char *str, xbt_dict_t patterns);
+/**
+ * @brief Returns the hash code of a string.
+ */
+static inline unsigned int xbt_str_hash_ext(const char* str, int str_len)
+{
+#ifdef XBT_DJB2_HASH_FUNCTION
+ /* fast implementation of djb2 algorithm */
+ unsigned int hash = 5381;
-/* */
-XBT_PUBLIC(void) xbt_str_strip_spaces(char *);
-XBT_PUBLIC(char *) xbt_str_diff(const char *a, const char *b);
+ while (str_len--) {
+ int c = *str++;
+ hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
+ }
+# elif defined(XBT_FNV_HASH_FUNCTION)
+ unsigned int hash = 0x811c9dc5;
+ unsigned char *bp = (unsigned char *) str; /* start of buffer */
+ unsigned char *be = bp + str_len; /* beyond end of buffer */
-XBT_PUBLIC(char *) xbt_str_from_file(FILE * file);
+ while (bp < be) {
+ /* multiply by the 32 bit FNV magic prime mod 2^32 */
+ hash +=
+ (hash << 1) + (hash << 4) + (hash << 7) + (hash << 8) +
+ (hash << 24);
-XBT_INLINE XBT_PUBLIC(unsigned int) xbt_dict_hash_ext(const char *str,
- int str_len);
-XBT_INLINE XBT_PUBLIC(unsigned int) xbt_dict_hash(const char *str);
-
-/** @brief Classical alias to (char*)
- *
- * This of almost no use, beside cosmetics and the XBT datadesc parsing macro (see \ref XBT_dd_auto).
+ /* xor the bottom with the current octet */
+ hash ^= (unsigned int) *bp++;
+ }
+
+# else
+ unsigned int hash = 0;
+
+ while (str_len--) {
+ hash += (*str) * (*str);
+ str++;
+ }
+#endif
+
+ return hash;
+}
+
+/**
+ * @brief Returns the hash code of a string.
*/
-typedef char *xbt_string_t;
+static inline unsigned int xbt_str_hash(const char *str)
+{
+#ifdef XBT_DJB2_HASH_FUNCTION
+ /* fast implementation of djb2 algorithm */
+ int c;
+ unsigned int hash = 5381;
-/**@}*/
+ while ((c = *str++)) {
+ hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
+ }
+
+# elif defined(XBT_FNV_HASH_FUNCTION)
+ unsigned int hash = 0x811c9dc5;
+
+ while (*str) {
+ /* multiply by the 32 bit FNV magic prime mod 2^32 */
+ hash += (hash << 1) + (hash << 4) + (hash << 7) + (hash << 8) + (hash << 24);
+
+ /* xor the bottom with the current byte */
+ hash ^= (unsigned int) *str++;
+ }
+# else
+ unsigned int hash = 0;
+
+ while (*str) {
+ hash += (*str) * (*str);
+ str++;
+ }
+#endif
+ return hash;
+}
+
+/**@}*/
SG_END_DECL()
#endif /* XBT_STR_H */
