release/src/router/busybox/include/xatonum.h

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * ascii-to-numbers implementations for busybox
   4  *
   5  * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
   6  *
   7  * Licensed under GPLv2, see file LICENSE in this source tree.
   8  */
   9
  10 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
  11
  12 /* Provides extern declarations of functions */
  13 #define DECLARE_STR_CONV(type, T, UT) \
  14 \
  15 unsigned type xstrto##UT##_range_sfx(const char *str, int b, unsigned type l, unsigned type u, const struct suffix_mult *sfx) FAST_FUNC; \
  16 unsigned type xstrto##UT##_range(const char *str, int b, unsigned type l, unsigned type u) FAST_FUNC; \
  17 unsigned type xstrto##UT##_sfx(const char *str, int b, const struct suffix_mult *sfx) FAST_FUNC; \
  18 unsigned type xstrto##UT(const char *str, int b) FAST_FUNC; \
  19 unsigned type xato##UT##_range_sfx(const char *str, unsigned type l, unsigned type u, const struct suffix_mult *sfx) FAST_FUNC; \
  20 unsigned type xato##UT##_range(const char *str, unsigned type l, unsigned type u) FAST_FUNC; \
  21 unsigned type xato##UT##_sfx(const char *str, const struct suffix_mult *sfx) FAST_FUNC; \
  22 unsigned type xato##UT(const char *str) FAST_FUNC; \
  23 type xstrto##T##_range_sfx(const char *str, int b, type l, type u, const struct suffix_mult *sfx) FAST_FUNC; \
  24 type xstrto##T##_range(const char *str, int b, type l, type u) FAST_FUNC; \
  25 type xstrto##T(const char *str, int b) FAST_FUNC; \
  26 type xato##T##_range_sfx(const char *str, type l, type u, const struct suffix_mult *sfx) FAST_FUNC; \
  27 type xato##T##_range(const char *str, type l, type u) FAST_FUNC; \
  28 type xato##T##_sfx(const char *str, const struct suffix_mult *sfx) FAST_FUNC; \
  29 type xato##T(const char *str) FAST_FUNC; \
  30
  31 /* Unsigned long long functions always exist */
  32 DECLARE_STR_CONV(long long, ll, ull)
  33
  34
  35 /* Provides inline definitions of functions */
  36 /* (useful for mapping them to the type of the same width) */
  37 #define DEFINE_EQUIV_STR_CONV(narrow, N, W, UN, UW) \
  38 \
  39 static ALWAYS_INLINE \
  40 unsigned narrow xstrto##UN##_range_sfx(const char *str, int b, unsigned narrow l, unsigned narrow u, const struct suffix_mult *sfx) \
  41 { return xstrto##UW##_range_sfx(str, b, l, u, sfx); } \
  42 static ALWAYS_INLINE \
  43 unsigned narrow xstrto##UN##_range(const char *str, int b, unsigned narrow l, unsigned narrow u) \
  44 { return xstrto##UW##_range(str, b, l, u); } \
  45 static ALWAYS_INLINE \
  46 unsigned narrow xstrto##UN##_sfx(const char *str, int b, const struct suffix_mult *sfx) \
  47 { return xstrto##UW##_sfx(str, b, sfx); } \
  48 static ALWAYS_INLINE \
  49 unsigned narrow xstrto##UN(const char *str, int b) \
  50 { return xstrto##UW(str, b); } \
  51 static ALWAYS_INLINE \
  52 unsigned narrow xato##UN##_range_sfx(const char *str, unsigned narrow l, unsigned narrow u, const struct suffix_mult *sfx) \
  53 { return xato##UW##_range_sfx(str, l, u, sfx); } \
  54 static ALWAYS_INLINE \
  55 unsigned narrow xato##UN##_range(const char *str, unsigned narrow l, unsigned narrow u) \
  56 { return xato##UW##_range(str, l, u); } \
  57 static ALWAYS_INLINE \
  58 unsigned narrow xato##UN##_sfx(const char *str, const struct suffix_mult *sfx) \
  59 { return xato##UW##_sfx(str, sfx); } \
  60 static ALWAYS_INLINE \
  61 unsigned narrow xato##UN(const char *str) \
  62 { return xato##UW(str); } \
  63 static ALWAYS_INLINE \
  64 narrow xstrto##N##_range_sfx(const char *str, int b, narrow l, narrow u, const struct suffix_mult *sfx) \
  65 { return xstrto##W##_range_sfx(str, b, l, u, sfx); } \
  66 static ALWAYS_INLINE \
  67 narrow xstrto##N##_range(const char *str, int b, narrow l, narrow u) \
  68 { return xstrto##W##_range(str, b, l, u); } \
  69 static ALWAYS_INLINE \
  70 narrow xstrto##N(const char *str, int b) \
  71 { return xstrto##W(str, b); } \
  72 static ALWAYS_INLINE \
  73 narrow xato##N##_range_sfx(const char *str, narrow l, narrow u, const struct suffix_mult *sfx) \
  74 { return xato##W##_range_sfx(str, l, u, sfx); } \
  75 static ALWAYS_INLINE \
  76 narrow xato##N##_range(const char *str, narrow l, narrow u) \
  77 { return xato##W##_range(str, l, u); } \
  78 static ALWAYS_INLINE \
  79 narrow xato##N##_sfx(const char *str, const struct suffix_mult *sfx) \
  80 { return xato##W##_sfx(str, sfx); } \
  81 static ALWAYS_INLINE \
  82 narrow xato##N(const char *str) \
  83 { return xato##W(str); } \
  84
  85 /* If long == long long, then just map them one-to-one */
  86 #if ULONG_MAX == ULLONG_MAX
  87 DEFINE_EQUIV_STR_CONV(long, l, ll, ul, ull)
  88 #else
  89 /* Else provide extern defs */
  90 DECLARE_STR_CONV(long, l, ul)
  91 #endif
  92
  93 /* Same for int -> [long] long */
  94 #if UINT_MAX == ULLONG_MAX
  95 DEFINE_EQUIV_STR_CONV(int, i, ll, u, ull)
  96 #elif UINT_MAX == ULONG_MAX
  97 DEFINE_EQUIV_STR_CONV(int, i, l, u, ul)
  98 #else
  99 DECLARE_STR_CONV(int, i, u)
 100 #endif
 101
 102 /* Specialized */
 103
 104 uint32_t BUG_xatou32_unimplemented(void);
 105 static ALWAYS_INLINE uint32_t xatou32(const char *numstr)
 106 {
 107         if (UINT_MAX == 0xffffffff)
 108                 return xatou(numstr);
 109         if (ULONG_MAX == 0xffffffff)
 110                 return xatoul(numstr);
 111         return BUG_xatou32_unimplemented();
 112 }
 113
 114 /* Non-aborting kind of convertors: bb_strto[u][l]l */
 115
 116 /* On exit: errno = 0 only if there was non-empty, '\0' terminated value
 117  * errno = EINVAL if value was not '\0' terminated, but otherwise ok
 118  *    Return value is still valid, caller should just check whether end[0]
 119  *    is a valid terminating char for particular case. OTOH, if caller
 120  *    requires '\0' terminated input, [s]he can just check errno == 0.
 121  * errno = ERANGE if value had alphanumeric terminating char ("1234abcg").
 122  * errno = ERANGE if value is out of range, missing, etc.
 123  * errno = ERANGE if value had minus sign for strtouXX (even "-0" is not ok )
 124  *    return value is all-ones in this case.
 125  */
 126
 127 unsigned long long bb_strtoull(const char *arg, char **endp, int base) FAST_FUNC;
 128 long long bb_strtoll(const char *arg, char **endp, int base) FAST_FUNC;
 129
 130 #if ULONG_MAX == ULLONG_MAX
 131 static ALWAYS_INLINE
 132 unsigned long bb_strtoul(const char *arg, char **endp, int base)
 133 { return bb_strtoull(arg, endp, base); }
 134 static ALWAYS_INLINE
 135 long bb_strtol(const char *arg, char **endp, int base)
 136 { return bb_strtoll(arg, endp, base); }
 137 #else
 138 unsigned long bb_strtoul(const char *arg, char **endp, int base) FAST_FUNC;
 139 long bb_strtol(const char *arg, char **endp, int base) FAST_FUNC;
 140 #endif
 141
 142 #if UINT_MAX == ULLONG_MAX
 143 static ALWAYS_INLINE
 144 unsigned bb_strtou(const char *arg, char **endp, int base)
 145 { return bb_strtoull(arg, endp, base); }
 146 static ALWAYS_INLINE
 147 int bb_strtoi(const char *arg, char **endp, int base)
 148 { return bb_strtoll(arg, endp, base); }
 149 #elif UINT_MAX == ULONG_MAX
 150 static ALWAYS_INLINE
 151 unsigned bb_strtou(const char *arg, char **endp, int base)
 152 { return bb_strtoul(arg, endp, base); }
 153 static ALWAYS_INLINE
 154 int bb_strtoi(const char *arg, char **endp, int base)
 155 { return bb_strtol(arg, endp, base); }
 156 #else
 157 unsigned bb_strtou(const char *arg, char **endp, int base) FAST_FUNC;
 158 int bb_strtoi(const char *arg, char **endp, int base) FAST_FUNC;
 159 #endif
 160
 161 uint32_t BUG_bb_strtou32_unimplemented(void);
 162 static ALWAYS_INLINE
 163 uint32_t bb_strtou32(const char *arg, char **endp, int base)
 164 {
 165         if (sizeof(uint32_t) == sizeof(unsigned))
 166                 return bb_strtou(arg, endp, base);
 167         if (sizeof(uint32_t) == sizeof(unsigned long))
 168                 return bb_strtoul(arg, endp, base);
 169         return BUG_bb_strtou32_unimplemented();
 170 }
 171 static ALWAYS_INLINE
 172 int32_t bb_strtoi32(const char *arg, char **endp, int base)
 173 {
 174         if (sizeof(int32_t) == sizeof(int))
 175                 return bb_strtoi(arg, endp, base);
 176         if (sizeof(int32_t) == sizeof(long))
 177                 return bb_strtol(arg, endp, base);
 178         return BUG_bb_strtou32_unimplemented();
 179 }
 180
 181 /* Floating point */
 182
 183 double bb_strtod(const char *arg, char **endp) FAST_FUNC;
 184
 185 POP_SAVED_FUNCTION_VISIBILITY