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/*
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This file is part of libmicrohttpd
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Copyright (C) 2015, 2016 Karlson2k (Evgeny Grin)
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file microhttpd/mhd_str.h
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* @brief Header for string manipulating helpers
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* @author Karlson2k (Evgeny Grin)
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*/
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#ifndef MHD_STR_H
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#define MHD_STR_H 1
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#include "mhd_options.h"
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#include <stdint.h>
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#include <stdlib.h>
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#ifdef HAVE_STDBOOL_H
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#include <stdbool.h>
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#endif /* HAVE_STDBOOL_H */
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#ifdef MHD_FAVOR_SMALL_CODE
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#include "mhd_limits.h"
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#endif /* MHD_FAVOR_SMALL_CODE */
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#ifndef MHD_STATICSTR_LEN_
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/**
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* Determine length of static string / macro strings at compile time.
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*/
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#define MHD_STATICSTR_LEN_(macro) (sizeof(macro)/sizeof(char) - 1)
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#endif /* ! MHD_STATICSTR_LEN_ */
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/*
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* Block of functions/macros that use US-ASCII charset as required by HTTP
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* standards. Not affected by current locale settings.
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*/
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#ifndef MHD_FAVOR_SMALL_CODE
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/**
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* Check two string for equality, ignoring case of US-ASCII letters.
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* @param str1 first string to compare
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* @param str2 second string to compare
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* @return non-zero if two strings are equal, zero otherwise.
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*/
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int
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MHD_str_equal_caseless_ (const char * str1,
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const char * str2);
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#else /* MHD_FAVOR_SMALL_CODE */
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/* Reuse MHD_str_equal_caseless_n_() to reduce size */
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#define MHD_str_equal_caseless_(s1,s2) MHD_str_equal_caseless_n_((s1),(s2), SIZE_MAX)
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#endif /* MHD_FAVOR_SMALL_CODE */
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/**
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* Check two string for equality, ignoring case of US-ASCII letters and
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* checking not more than @a maxlen characters.
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* Compares up to first terminating null character, but not more than
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* first @a maxlen characters.
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* @param str1 first string to compare
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* @param str2 second string to compare
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* @param maxlen maximum number of characters to compare
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* @return non-zero if two strings are equal, zero otherwise.
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*/
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int
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MHD_str_equal_caseless_n_ (const char * const str1,
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const char * const str2,
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size_t maxlen);
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/**
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* Check whether @a str has case-insensitive @a token.
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* Token could be surrounded by spaces and tabs and delimited by comma.
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* Match succeed if substring between start, end of string or comma
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* contains only case-insensitive token and optional spaces and tabs.
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* @warning token must not contain null-charters except optional
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* terminating null-character.
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* @param str the string to check
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* @param token the token to find
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* @param token_len length of token, not including optional terminating
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* null-character.
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* @return non-zero if two strings are equal, zero otherwise.
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*/
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bool
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MHD_str_has_token_caseless_ (const char * str,
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const char * const token,
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size_t token_len);
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/**
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* Check whether @a str has case-insensitive static @a tkn.
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* Token could be surrounded by spaces and tabs and delimited by comma.
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* Match succeed if substring between start, end of string or comma
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* contains only case-insensitive token and optional spaces and tabs.
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* @warning tkn must be static string
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* @param str the string to check
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* @param tkn the static string of token to find
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* @return non-zero if two strings are equal, zero otherwise.
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*/
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#define MHD_str_has_s_token_caseless_(str,tkn) \
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MHD_str_has_token_caseless_((str),(tkn),MHD_STATICSTR_LEN_(tkn))
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#ifndef MHD_FAVOR_SMALL_CODE
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/* Use individual function for each case to improve speed */
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/**
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* Convert decimal US-ASCII digits in string to number in uint64_t.
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* Conversion stopped at first non-digit character.
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* @param str string to convert
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* @param out_val pointer to uint64_t to store result of conversion
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* @return non-zero number of characters processed on succeed,
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* zero if no digit is found, resulting value is larger
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* then possible to store in uint64_t or @a out_val is NULL
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*/
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size_t
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MHD_str_to_uint64_ (const char * str,
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uint64_t * out_val);
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/**
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* Convert not more then @a maxlen decimal US-ASCII digits in string to
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* number in uint64_t.
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* Conversion stopped at first non-digit character or after @a maxlen
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* digits.
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* @param str string to convert
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* @param maxlen maximum number of characters to process
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* @param out_val pointer to uint64_t to store result of conversion
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* @return non-zero number of characters processed on succeed,
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* zero if no digit is found, resulting value is larger
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* then possible to store in uint64_t or @a out_val is NULL
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*/
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size_t
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MHD_str_to_uint64_n_ (const char * str,
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size_t maxlen,
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uint64_t * out_val);
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/**
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* Convert hexadecimal US-ASCII digits in string to number in uint32_t.
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* Conversion stopped at first non-digit character.
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* @param str string to convert
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* @param out_val pointer to uint32_t to store result of conversion
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* @return non-zero number of characters processed on succeed,
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* zero if no digit is found, resulting value is larger
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* then possible to store in uint32_t or @a out_val is NULL
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*/
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size_t
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MHD_strx_to_uint32_ (const char * str,
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uint32_t * out_val);
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/**
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* Convert not more then @a maxlen hexadecimal US-ASCII digits in string
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* to number in uint32_t.
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* Conversion stopped at first non-digit character or after @a maxlen
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* digits.
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* @param str string to convert
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* @param maxlen maximum number of characters to process
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* @param out_val pointer to uint32_t to store result of conversion
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* @return non-zero number of characters processed on succeed,
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* zero if no digit is found, resulting value is larger
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* then possible to store in uint32_t or @a out_val is NULL
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*/
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size_t
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MHD_strx_to_uint32_n_ (const char * str,
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size_t maxlen,
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uint32_t * out_val);
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/**
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* Convert hexadecimal US-ASCII digits in string to number in uint64_t.
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* Conversion stopped at first non-digit character.
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* @param str string to convert
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* @param out_val pointer to uint64_t to store result of conversion
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* @return non-zero number of characters processed on succeed,
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* zero if no digit is found, resulting value is larger
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* then possible to store in uint64_t or @a out_val is NULL
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*/
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size_t
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MHD_strx_to_uint64_ (const char * str,
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uint64_t * out_val);
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/**
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* Convert not more then @a maxlen hexadecimal US-ASCII digits in string
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* to number in uint64_t.
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* Conversion stopped at first non-digit character or after @a maxlen
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* digits.
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* @param str string to convert
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* @param maxlen maximum number of characters to process
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* @param out_val pointer to uint64_t to store result of conversion
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* @return non-zero number of characters processed on succeed,
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* zero if no digit is found, resulting value is larger
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* then possible to store in uint64_t or @a out_val is NULL
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*/
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size_t
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MHD_strx_to_uint64_n_ (const char * str,
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size_t maxlen,
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uint64_t * out_val);
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#else /* MHD_FAVOR_SMALL_CODE */
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/* Use one universal function and macros to reduce size */
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/**
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* Generic function for converting not more then @a maxlen
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* hexadecimal or decimal US-ASCII digits in string to number.
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* Conversion stopped at first non-digit character or after @a maxlen
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* digits.
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* To be used only within macro.
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* @param str the string to convert
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* @param maxlen the maximum number of characters to process
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* @param out_val the pointer to uint64_t to store result of conversion
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* @param val_size the size of variable pointed by @a out_val
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* @param max_val the maximum decoded number
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* @param base the numeric base, 10 or 16
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* @return non-zero number of characters processed on succeed,
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* zero if no digit is found, resulting value is larger
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* then @ max_val or @a out_val is NULL
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*/
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size_t
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MHD_str_to_uvalue_n_ (const char * str,
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size_t maxlen,
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void * out_val,
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size_t val_size,
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uint64_t max_val,
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int base);
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#define MHD_str_to_uint64_(s,ov) MHD_str_to_uvalue_n_((s),SIZE_MAX,(ov),\
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sizeof(uint64_t),UINT64_MAX,10)
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#define MHD_str_to_uint64_n_(s,ml,ov) MHD_str_to_uvalue_n_((s),(ml),(ov),\
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sizeof(uint64_t),UINT64_MAX,10)
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#define MHD_strx_to_sizet_(s,ov) MHD_str_to_uvalue_n_((s),SIZE_MAX,(ov),\
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sizeof(size_t),SIZE_MAX,16)
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#define MHD_strx_to_sizet_n_(s,ml,ov) MHD_str_to_uvalue_n_((s),(ml),(ov),\
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sizeof(size_t),SIZE_MAX,16)
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#define MHD_strx_to_uint32_(s,ov) MHD_str_to_uvalue_n_((s),SIZE_MAX,(ov),\
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sizeof(uint32_t),UINT32_MAX,16)
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#define MHD_strx_to_uint32_n_(s,ml,ov) MHD_str_to_uvalue_n_((s),(ml),(ov),\
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sizeof(uint32_t),UINT32_MAX,16)
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#define MHD_strx_to_uint64_(s,ov) MHD_str_to_uvalue_n_((s),SIZE_MAX,(ov),\
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sizeof(uint64_t),UINT64_MAX,16)
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#define MHD_strx_to_uint64_n_(s,ml,ov) MHD_str_to_uvalue_n_((s),(ml),(ov),\
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sizeof(uint64_t),UINT64_MAX,16)
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#endif /* MHD_FAVOR_SMALL_CODE */
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#endif /* MHD_STR_H */
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