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121 lines
2.3 KiB
121 lines
2.3 KiB
2 months ago
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/*
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* UCW Library -- Conversions of Strings to Numbers
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*
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* (c) 2010 Daniel Fiala <danfiala@ucw.cz>
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*
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* This software may be freely distributed and used according to the terms
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* of the GNU Lesser General Public License.
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*/
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#include <ucw/lib.h>
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#include <ucw/string.h>
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#include <ucw/chartype.h>
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#include <ucw/strtonum.h>
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static uint detect_base(const char **pp, const uint flags)
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{
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if ((flags & STN_BASES0) && **pp == '0')
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{
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switch ( (*pp)[1] )
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{
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case 'x':
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case 'X':
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if (flags & STN_HEX)
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{
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*pp += 2;
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return 16;
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}
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break;
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case 'b':
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case 'B':
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if (flags & STN_BIN)
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{
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*pp += 2;
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return 2;
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}
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break;
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case 'o':
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case 'O':
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if (flags & STN_OCT)
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{
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*pp += 2;
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return 8;
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}
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break;
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case '0'...'7':
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if (flags & STN_OCT0)
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{
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(*pp)++;
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return 8;
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}
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break;
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}
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}
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return 0;
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}
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static const char *str_to_num_init(const char **pp, const uint flags, uint *sign, uint *base)
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{
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ASSERT(*pp);
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const char *err = NULL;
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const char *p = *pp;
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// Parse sign
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*sign = 0;
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if (flags & (STN_SIGNS))
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{
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if (*p == '-' && (flags & STN_MINUS))
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{
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*sign = 1;
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p++;
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}
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else if (*p == '+' && (flags & STN_PLUS))
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p++;
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}
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*base = detect_base(&p, flags) ? : flags & STN_DBASES_MASK;
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*pp = p;
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return err;
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}
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static inline uint get_digit(const uint c)
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{
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if (c <= '9')
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return c - '0';
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else
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{
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const int a = c & 0xDF;
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uint d = a - 'A';
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d &= 0xFF;
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d += 10;
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return d;
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}
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}
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#define STN_TYPE uint
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#define STN_SUFFIX uint
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#include <ucw/strtonum-gen.h>
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#define STN_TYPE u32
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#define STN_SUFFIX u32
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#include <ucw/strtonum-gen.h>
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#define STN_TYPE u64
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#define STN_SUFFIX u64
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#include <ucw/strtonum-gen.h>
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#define STN_TYPE uintmax_t
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#define STN_SUFFIX uintmax
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#include <ucw/strtonum-gen.h>
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// FIXME: For backward compatibility, will be removed soon
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#define STN_TYPE uns
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#define STN_SUFFIX uns
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#include <ucw/strtonum-gen.h>
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