162 lines
7.0 KiB
C
162 lines
7.0 KiB
C
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//*****************************************************************************
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//
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//! @file am_util_string.h
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//!
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//! @brief A subset of the functions provided in the C standard string library.
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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// Copyright (c) 2020, Ambiq Micro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// Third party software included in this distribution is subject to the
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// additional license terms as defined in the /docs/licenses directory.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// This is part of revision 2.4.2 of the AmbiqSuite Development Package.
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//
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//*****************************************************************************
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#ifndef AM_UTIL_STRING_H
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#define AM_UTIL_STRING_H
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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//*****************************************************************************
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//
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// Character attributes lookup table defines.
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//
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//*****************************************************************************
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#define AM_CATTR_NONE 0x00
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#define AM_CATTR_ALPHA 0x01
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#define AM_CATTR_LOWER 0x02
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#define AM_CATTR_UPPER 0x04
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#define AM_CATTR_DIGIT 0x08
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#define AM_CATTR_XDIGIT 0x10
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#define AM_CATTR_WHSPACE 0x20
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#define AM_CATTR_FILENM83 0x80
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//
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// Set MINIMIZE_CATTR_TABLE to 1 to configure for minimal CATTR table size,
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// (256 instead of 512 bytes) but at a cost of slightly larger code size.
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// However, setting this option also provides an additional level of checking
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// of the argument; if the argument is not a uint8_t, the functions are
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// guaranteed to return 0.
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//
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#define MINIMIZE_CATTR_TABLE 0
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//*****************************************************************************
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//
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// Globals
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//
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//*****************************************************************************
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extern const uint8_t am_cattr[];
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//*****************************************************************************
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//
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// External function definitions
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//
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//*****************************************************************************
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extern int32_t am_util_string_strcmp(const char *str1, const char *str2);
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extern int32_t am_util_string_stricmp(const char *str1, const char *str2);
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extern int32_t am_util_string_strncmp(const char *str1, const char *str2,
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uint32_t num);
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extern int32_t am_util_string_strnicmp(const char *str1, const char *str2,
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int num);
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extern uint32_t am_util_string_strlen(const char *pcStr);
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extern char *am_util_string_strcpy(char *pcDst, const char *pcSrc);
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extern char *am_util_string_strncpy(char *pcDst, const char *pcSrc, uint32_t uNum);
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extern char *am_util_string_strcat(char *pcDst, const char *pcSrc);
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//*****************************************************************************
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//
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// Character "is" macros and functions
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//
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//*****************************************************************************
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//
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// By default all of the "is" functions are implemented as macros. To implement
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// as functions rather than macros, use a global compiler command line (-D)
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// option to define AM_UTIL_STRING_CTYPE_DISABLE_MACROS.
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//
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#ifdef AM_UTIL_STRING_CTYPE_DISABLE_MACROS
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extern int am_util_string_isalnum(int c);
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extern int am_util_string_isalpha(int c);
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extern int am_util_string_isdigit(int c);
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extern int am_util_string_islower(int c);
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extern int am_util_string_isspace(int c);
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extern int am_util_string_isupper(int c);
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extern int am_util_string_isxdigit(int c);
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extern int am_util_string_tolower(int c);
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extern int am_util_string_toupper(int c);
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// Non-standard "is" Functions
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extern int am_util_string_isfilenm83(int c);
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#else
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#if MINIMIZE_CATTR_TABLE
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#define am_util_string_isalnum(c) ((c & 0xffffff80) ? 0 : (am_cattr[c] & (AM_CATTR_ALPHA | AM_CATTR_DIGIT)) ? 1 : 0)
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#define am_util_string_isalpha(c) ((c & 0xffffff80) ? 0 : (am_cattr[c] & AM_CATTR_ALPHA) ? 1 : 0)
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#define am_util_string_isdigit(c) ((c & 0xffffff80) ? 0 : (am_cattr[c] & AM_CATTR_DIGIT) ? 1 : 0)
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#define am_util_string_islower(c) ((c & 0xffffff80) ? 0 : (am_cattr[c] & AM_CATTR_LOWER) ? 1 : 0)
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#define am_util_string_isspace(c) ((c & 0xffffff80) ? 0 : (am_cattr[c] & AM_CATTR_WHSPACE) ? 1 : 0)
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#define am_util_string_isupper(c) ((c & 0xffffff80) ? 0 : (am_cattr[c] & AM_CATTR_UPPER) ? 1 : 0)
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#define am_util_string_isxdigit(c) ((c & 0xffffff80) ? 0 : (am_cattr[c] & AM_CATTR_XDIGIT) ? 1 : 0)
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#define am_util_string_tolower(c) ((am_cattr[c & 0x7f] & AM_CATTR_UPPER) ? c | 0x20 : c)
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#define am_util_string_toupper(c) ((am_cattr[c & 0x7f] & AM_CATTR_LOWER) ? c & ~0x20 : c)
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#else
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#define am_util_string_isalnum(c) (am_cattr[c & 0xff] & (AM_CATTR_ALPHA | AM_CATTR_DIGIT))
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#define am_util_string_isalpha(c) (am_cattr[c & 0xff] & AM_CATTR_ALPHA)
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#define am_util_string_isdigit(c) (am_cattr[c & 0xff] & AM_CATTR_DIGIT)
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#define am_util_string_islower(c) (am_cattr[c & 0xff] & AM_CATTR_LOWER)
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#define am_util_string_isspace(c) (am_cattr[c & 0xff] & AM_CATTR_WHSPACE)
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#define am_util_string_isupper(c) (am_cattr[c & 0xff] & AM_CATTR_UPPER)
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#define am_util_string_isxdigit(c) (am_cattr[c & 0xff] & AM_CATTR_XDIGIT)
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#define am_util_string_tolower(c) ((am_cattr[c & 0xff] & AM_CATTR_UPPER) ? c | 0x20 : c)
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#define am_util_string_toupper(c) ((am_cattr[c & 0xff] & AM_CATTR_LOWER) ? c & ~0x20 : c)
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#endif // MINIMIZE_CATTR_TABLE
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//
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// Non-standard "is" Functions
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//
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#define am_util_string_isfilenm83(c) (am_cattr[c & 0xff] & AM_CATTR_FILENM83)
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#endif // AM_UTIL_STRING_CTYPE_DISABLE_MACROS
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#ifdef __cplusplus
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}
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#endif
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#endif // AM_UTIL_STRING_H
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