| 1 | /*
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| 2 | * Copyright (c) 2012 Sean Bartell
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef BITHENGE_HELENOS_COMMON_H_
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| 30 | #define BITHENGE_HELENOS_COMMON_H_
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| 31 |
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| 32 | #include <bithenge/os.h>
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| 33 | #include <stdbool.h>
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| 34 | #include <stddef.h>
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| 35 | #include <stdlib.h>
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| 36 | #include <byteorder.h>
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| 37 | #include <errno.h>
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| 38 | #include <inttypes.h>
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| 39 | #include <macros.h>
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| 40 | #include <mem.h>
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| 41 | #include <str.h>
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| 42 | #include <str_error.h>
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| 43 |
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| 44 | #define BITHENGE_PRId PRId64
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| 45 |
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| 46 | typedef struct {
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| 47 | const char *string;
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| 48 | size_t offset;
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| 49 | char32_t ch;
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| 50 | } string_iterator_t;
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| 51 |
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| 52 | static inline string_iterator_t string_iterator(const char *string)
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| 53 | {
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| 54 | string_iterator_t i;
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| 55 | i.string = string;
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| 56 | i.offset = 0;
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| 57 | i.ch = str_decode(i.string, &i.offset, STR_NO_LIMIT);
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| 58 | return i;
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| 59 | }
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| 60 |
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| 61 | static inline bool string_iterator_done(const string_iterator_t *i)
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| 62 | {
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| 63 | return i->ch == L'\0';
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| 64 | }
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| 65 |
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| 66 | static inline errno_t string_iterator_next(string_iterator_t *i, char32_t *out)
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| 67 | {
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| 68 | *out = i->ch;
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| 69 | if (*out == U_SPECIAL)
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| 70 | return EINVAL;
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| 71 | i->ch = str_decode(i->string, &i->offset, STR_NO_LIMIT);
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| 72 | return EOK;
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| 73 | }
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| 74 |
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| 75 | static inline errno_t bithenge_parse_int(const char *start, bithenge_int_t *result)
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| 76 | {
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| 77 | const char *real_start = *start == '-' ? start + 1 : start;
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| 78 | uint64_t val;
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| 79 | errno_t rc = str_uint64_t(real_start, NULL, 10, false, &val);
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| 80 | *result = val;
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| 81 | if (*start == '-')
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| 82 | *result = -*result;
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| 83 | return rc;
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| 84 | }
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| 85 |
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| 86 | #endif
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