helpers.h

/*
 * helpers.h
 *
 * Version: 2.2.6
 *
 * -----------------------------------------------------------------------------
 *
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2018-2024 Ryan M. Lederman <lederman@gmail.com>
 * Copyright (c) 2018-2024 Jeffrey H. Johnson <trnsz@pobox.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * -----------------------------------------------------------------------------
 */
 
#ifndef _SIR_HELPERS_H_INCLUDED
# define _SIR_HELPERS_H_INCLUDED
 
# include "sir/types.h"
# include "sir/errors.h"
 
# if defined(__cplusplus)
extern "C" {
# endif
 
# define _sir_countof(arr) (sizeof(arr) / sizeof(arr[0]))
 
# define _SIR_L_START(format) \
    bool ret = false; \
    va_list args; \
    do { \
        if (!_sir_validptr(format)) \
            return false; \
        va_start(args, format); \
    } while (false)
 
# define _SIR_L_END() \
    va_end(args)
 
# define _SIR_LOCK_SECTION(type, name, mid, ret) \
    type* name = _sir_locksection(mid); \
    do { \
        if (!name) { \
            (void)_sir_seterror(_SIR_E_INTERNAL); \
            return ret; \
        } \
    } while (false)
 
# define _SIR_UNLOCK_SECTION(mid) \
    _sir_unlocksection(mid)
 
# define SIR_UNUSED(param) (void)param
 
# define SIR_ASSERT_UNUSED(assertion, var) SIR_ASSERT(assertion); SIR_UNUSED(var)
 
# define _SIR_PRNSTR(str) (str ? str : "<null>")
 
# define _SIR_DECLARE_BIN_SEARCH(low, high) \
    size_t _low = low, _high = high; \
    size_t _mid = (_low + _high) / 2
 
# define _SIR_BEGIN_BIN_SEARCH() do {
 
# define _SIR_ITERATE_BIN_SEARCH(comparison) \
    if (_low == _high) \
        break; \
    if (0 > comparison && (_mid - 1) >= _low) { \
        _high = _mid - 1; \
    } else if ((_mid + 1) <= _high) { \
        _low = _mid + 1; \
    } else { \
        break; \
    } \
    _mid = (_low + _high) / 2
 
# define _SIR_END_BIN_SEARCH() \
    } while (true)
 
/* Validates a pointer and optionally fails if it's invalid. */
static inline
bool __sir_validptr(const void* restrict p, bool fail, const char* func,
    const char* file, uint32_t line) {
    bool valid = NULL != p;
    if (fail && !valid) {
        (void)__sir_seterror(_SIR_E_NULLPTR, func, file, line);
        SIR_ASSERT(!valid && fail);
    }
    return valid;
}
 
static inline
bool __sir_validptrptr(const void* restrict* pp, bool fail, const char* func,
    const char* file, uint32_t line) {
    bool valid = NULL != pp;
    if (fail && !valid) {
        (void)__sir_seterror(_SIR_E_NULLPTR, func, file, line);
        SIR_ASSERT(!valid && fail);
    }
    return valid;
}
 
# define _sir_validptrnofail(p) \
    __sir_validptr(p, false, __func__, __file__, __LINE__)
 
# define _sir_validptr(p) \
    __sir_validptr((const void* restrict)p, true, __func__, __file__, __LINE__)
 
# define _sir_validfnptr(fnp) \
    __sir_validptrptr((const void* restrict*)&fnp, true, __func__, __file__, __LINE__)
 
# define _sir_validptrptr(pp) \
    __sir_validptrptr((const void* restrict*)pp, true, __func__, __file__, __LINE__)
 
static inline
bool _sir_bittest(uint32_t flags, uint32_t test) {
    return (flags & test) == test;
}
 
static inline
void _sir_setbitshigh(uint32_t* flags, uint32_t set) {
    if (NULL != flags)
        *flags |= set;
}
 
static inline
void _sir_setbitslow(uint32_t* flags, uint32_t set) {
    if (NULL != flags)
        *flags &= ~set;
}
 
# define _sir_eqland(b, expr) ((b) = (expr) && (b))
 
void __sir_safefree(void** pp);
 
# define _sir_safefree(pp) __sir_safefree((void**)pp)
 
void _sir_safeclose(int* restrict fd);
 
void _sir_safefclose(FILE* restrict* restrict f);
 
bool _sir_validfd(int fd);
 
static inline
bool _sir_validfileid(sirfileid id) {
    return 0U != id;
}
 
static inline
bool _sir_validpluginid(sirpluginid id) {
    return 0U != id;
}
 
bool __sir_validupdatedata(const sir_update_config_data* data, const char* func,
    const char* file, uint32_t line);
 
# define _sir_validupdatedata(data) \
    __sir_validupdatedata(data, __func__, __file__, __LINE__)
 
bool __sir_validlevels(sir_levels levels, const char* func, const char* file,
    uint32_t line);
 
# define _sir_validlevels(levels) \
    __sir_validlevels(levels, __func__, __file__, __LINE__)
 
bool __sir_validlevel(sir_level level, const char* func, const char* file,
    uint32_t line);
 
# define _sir_validlevel(level) \
    __sir_validlevel(level, __func__, __file__, __LINE__)
 
static inline
void _sir_defaultlevels(sir_levels* levels, sir_levels def) {
    if (levels && SIRL_DEFAULT == *levels)
        *levels = def;
}
 
static inline
void _sir_defaultopts(sir_options* opts, sir_options def) {
    if (opts && SIRO_DEFAULT == *opts)
        *opts = def;
}
 
bool __sir_validopts(sir_options opts, const char* func, const char* file,
    uint32_t line);
 
# define _sir_validopts(opts) \
    __sir_validopts(opts, __func__, __file__, __LINE__)
 
bool __sir_validtextattr(sir_textattr attr, const char* func, const char* file,
    uint32_t line);
 
# define _sir_validtextattr(attr) \
    __sir_validtextattr(attr, __func__, __file__, __LINE__)
 
bool __sir_validtextcolor(sir_colormode mode, sir_textcolor color, const char* func,
    const char* file, uint32_t line);
 
# define _sir_validtextcolor(mode, color) \
    __sir_validtextcolor(mode, color, __func__, __file__, __LINE__)
 
bool __sir_validcolormode(sir_colormode mode, const char* func, const char* file,
    uint32_t line);
 
# define _sir_validcolormode(mode) \
    __sir_validcolormode(mode, __func__, __file__, __LINE__)
 
static inline
sir_textcolor _sir_mkansifgcolor(sir_textcolor fg) {
    return SIRTC_DEFAULT == fg ? 39 : fg < 8 ? fg + 30 : fg + 82;
}
 
static inline
sir_textcolor _sir_mkansibgcolor(sir_textcolor bg) {
    return SIRTC_DEFAULT == bg ? 49 : bg < 8 ? bg + 40 : bg + 92;
}
 
static inline
sir_textcolor _sir_getansifgcmd(sir_textcolor fg) {
    return SIRTC_DEFAULT == fg ? 39 : 38;
}
 
static inline
sir_textcolor _sir_getansibgcmd(sir_textcolor bg) {
    return SIRTC_DEFAULT == bg ? 49 : 48;
}
 
# define _sir_getredfromcolor(color) (uint8_t)(((color) >> 16) & 0x000000ffU)
 
# define _sir_setredincolor(color, red) (color |= (((red) << 16) & 0x00ff0000U))
 
# define _sir_getgreenfromcolor(color) (uint8_t)(((color) >> 8) & 0x000000ffU)
 
# define _sir_setgreenincolor(color, green) ((color) |= (((green) << 8) & 0x0000ff00U))
 
# define _sir_getbluefromcolor(color) (uint8_t)((color) & 0x000000ffU)
 
# define _sir_setblueincolor(color, blue) ((color) |= ((blue) & 0x000000ffU))
 
static inline
sir_textcolor _sir_makergb(sir_textcolor r, sir_textcolor g, sir_textcolor b) {
    sir_textcolor retval = 0;
    _sir_setredincolor(retval, r);
    _sir_setgreenincolor(retval, g);
    _sir_setblueincolor(retval, b);
    return retval;
}
 
static inline
bool __sir_validstr(const char* restrict str, bool fail, const char* func,
    const char* file, uint32_t line) {
    bool valid = str && *str != '\0';
    if (fail && !valid) {
        SIR_ASSERT(!valid && fail);
        (void)__sir_seterror(_SIR_E_STRING, func, file, line);
    }
    return valid;
}
 
# define _sir_validstr(str) \
    __sir_validstr(str, true, __func__, __file__, __LINE__)
 
# define _sir_validstrnofail(str) \
    __sir_validstr(str, false, __func__, __file__, __LINE__)
 
static inline
void _sir_resetstr(char* str) {
    if (NULL != str)
        *str = '\0';
}
 
static inline
bool _sir_strsame(const char* lhs, const char* rhs, size_t count) {
    return 0 == strncmp(lhs, rhs, count);
}
 
int _sir_strncpy(char* restrict dest, size_t destsz,
    const char* restrict src, size_t count);
 
int _sir_strncat(char* restrict dest, size_t destsz,
    const char* restrict src, size_t count);
 
int _sir_fopen(FILE* restrict* restrict streamptr, const char* restrict filename,
    const char* restrict mode);
 
static inline
struct tm* _sir_localtime(const time_t* timer, struct tm* buf) {
    if (!timer || !buf)
        return NULL;
# if defined(__HAVE_STDC_SECURE_OR_EXT1__) && !defined(__EMBARCADEROC__)
#  if !defined(__WIN__)
    struct tm* ret = localtime_s(timer, buf);
    if (!ret) {
        (void)_sir_handleerr(errno);
        return NULL;
    }
#  else /* __WIN__ */
    errno_t ret = localtime_s(buf, timer);
    if (0 != ret) {
        (void)_sir_handleerr(ret);
        return NULL;
    }
#  endif
    return buf;
# else /* !__HAVE_STDC_SECURE_OR_EXT1__ */
#  if !defined(__WIN__) || \
     (defined(__EMBARCADEROC__) && (__clang_major__ < 15))
    struct tm* ret = localtime_r(timer, buf);
#  else
    struct tm* ret = localtime(timer);
#  endif
    if (!ret)
        (void)_sir_handleerr(errno);
    return ret;
# endif
}
 
# if defined(__GNUC__)
__attribute__ ((format (strftime, 3, 0)))
# endif
static inline
bool _sir_formattime(time_t now, char* buffer, const char* format) {
    if (!buffer || !format)
        return false;
# if defined(__GNUC__) && !defined(__clang__) && \
    !(defined(__OPEN64__) || defined(__OPENCC__) || defined(__PCC__))
#  pragma GCC diagnostic push
#  pragma GCC diagnostic ignored "-Wformat-nonliteral"
# endif
    struct tm timebuf;
    const struct tm* ptb = _sir_localtime(&now, &timebuf);
    return NULL != ptb && 0 != strftime(buffer, SIR_MAXTIME, format, ptb);
# if defined(__GNUC__) && !defined(__clang__) && \
    !(defined(__OPEN64__) || defined(__OPENCC__) || defined(__PCC__))
#  pragma GCC diagnostic pop
# endif
}
 
bool _sir_getchar(char* input);
 
# define _sir_snprintf_trunc(dst, size, ...) \
    do { \
      volatile size_t _n = size; \
      if (!snprintf(dst, _n, __VA_ARGS__)) { (void)_n; }; \
    } while (false)
 
static inline
uint32_t FNV32_1a(const uint8_t* data, size_t len) {
    uint32_t hash = 2166136261U;
    for (size_t n = 0; n < len; n++) {
        hash ^= (uint32_t)data[n];
        hash = (uint32_t)(hash * 16777619ULL);
    }
    return hash;
}
 
# if defined(__clang__) /* only Clang has unsigned-integer-overflow; GCC BZ#96829 */
SANITIZE_SUPPRESS("unsigned-integer-overflow")
# endif
static inline
uint64_t FNV64_1a(const char* str) {
    uint64_t hash = 14695981039346656037ULL;
    for (const char* c = str; *c; c++) {
        hash ^= (uint64_t)(unsigned char)(*c);
        hash *= 1099511628211ULL; /* unsigned-integer-overflow */
    }
    return hash;
}
 
void* _sir_explicit_memset(void *ptr, int c, size_t len);
 
char* _sir_strremove(char *str, const char *sub);
 
char* _sir_strsqueeze(char *str);
 
char* _sir_strredact(char *str, const char *sub, const char c);
 
char* _sir_strreplace(char *str, const char c, const char n);
 
size_t _sir_strcreplace(char *str, const char c, const char n, int32_t max);
 
# if defined(__cplusplus)
}
# endif
 
#endif /* !_SIR_HELPERS_H_INCLUDED */