X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/6f4585f1e19602414bc4971c9d19fc5d600eb0fa..8076778aad2138e5a16361754be434ba4c8b1f78:/include/xbt/str.h diff --git a/include/xbt/str.h b/include/xbt/str.h index d1cf58001f..8068459aed 100644 --- a/include/xbt/str.h +++ b/include/xbt/str.h @@ -1,9 +1,7 @@ -/* $Id$ */ - /* str.h - XBT string related functions. */ -/* Copyright (c) 2004-7, Martin Quinson, Arnaud Legrand and Cherier Malek. */ -/* All rights reserved. */ +/* Copyright (c) 2007-2017. 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. */ @@ -11,79 +9,111 @@ #ifndef XBT_STR_H #define XBT_STR_H -#include /* va_* */ -#include "xbt/misc.h" -#include "xbt/dynar.h" #include "xbt/dict.h" -#include /* FILE for getline */ +#include "xbt/dynar.h" +#include "xbt/misc.h" + +#include /* va_* */ +#include /* FILE */ 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. * @{ */ -/* snprintf related functions */ -/** @brief print to allocated string (reimplemented when not provided by the system) - * - * The functions asprintf() and vasprintf() are analogues of - * sprintf() and vsprintf(), except that they allocate a string large - * enough to hold the output including the terminating null byte, and - * return a pointer to it via the first parameter. This pointer - * should be passed to free(3) to release the allocated storage when - * it is no longer needed. - */ -XBT_PUBLIC(int) asprintf(char **ptr, const char *fmt, /*args */ - ...) _XBT_GNUC_PRINTF(2, 3); -/** @brief print to allocated string (reimplemented when not provided by the system) - * - * See asprintf() - */ -XBT_PUBLIC(int) vasprintf(char **ptr, const char *fmt, va_list ap); -/** @brief print to allocated string - * - * Works just like asprintf(), but returns a pointer to the newly created string - */ -XBT_PUBLIC(char *) bprintf(const char *fmt, ...) _XBT_GNUC_PRINTF(1, 2); - -/* the gettext function. It gets redefined here only if not yet available */ -#if !defined(__USE_GNU) || defined(DOXYGEN) -XBT_PUBLIC(long) getline(char **lineptr, size_t * n, FILE * stream); -#endif - -/* 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_str(const char *s, const char *sep); +XBT_PUBLIC(xbt_dynar_t) xbt_str_split_quoted_in_place(char *s); -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); -/* */ -XBT_PUBLIC(void) xbt_str_subst(char *str, char from, char to, int amount); -XBT_PUBLIC(char *) xbt_str_varsubst(char *str, xbt_dict_t patterns); +XBT_PUBLIC(long int) xbt_str_parse_int(const char* str, const char* error_msg); +XBT_PUBLIC(double) xbt_str_parse_double(const char* str, const char* error_msg); -/* */ -XBT_PUBLIC(void) xbt_str_strip_spaces(char *); -XBT_PUBLIC(char *) xbt_str_diff(char *a, char *b); +#define XBT_DJB2_HASH_FUNCTION +//#define XBT_FNV_HASH_FUNCTION +/** + * @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; + + 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 */ + + 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); + + /* xor the bottom with the current octet */ + hash ^= (unsigned int) *bp++; + } + +# else + unsigned int hash = 0; + + while (str_len--) { + hash += (*str) * (*str); + str++; + } +#endif -XBT_PUBLIC(char*)xbt_str_from_file(FILE *file); + return hash; +} -/** @brief Classical alias to (char*) - * - * This of almost no use, beside cosmetics and the GRAS parsing macro (see \ref GRAS_dd_auto). +/** + * @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 */ +#endif /* XBT_STR_H */