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u8-mbtoucr.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/coreutils/src/lib/unistr/u8-mbtoucr.c
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1/* Look at first character in UTF-8 string, returning an error code.-
2 Copyright (C) 1999-2002, 2006-2007, 2009-2018 Free Software Foundation, Inc.-
3 Written by Bruno Haible <bruno@clisp.org>, 2001.-
4-
5 This program is free software: you can redistribute it and/or modify it-
6 under the terms of the GNU General Public License as published-
7 by the Free Software Foundation; either version 3 of the License, or-
8 (at your option) any later version.-
9-
10 This program is distributed in the hope that it will be useful,-
11 but WITHOUT ANY WARRANTY; without even the implied warranty of-
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU-
13 General Public License for more details.-
14-
15 You should have received a copy of the GNU General Public License-
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */-
17-
18#include <config.h>-
19-
20/* Specification. */-
21#include "unistr.h"-
22-
23int-
24u8_mbtoucr (ucs4_t *puc, const uint8_t *s, size_t n)-
25{-
26 uint8_t c = *s;-
27-
28 if (c < 0x80)
c < 0x80Description
TRUEnever evaluated
FALSEnever evaluated
0
29 {-
30 *puc = c;-
31 return 1;
never executed: return 1;
0
32 }-
33 else if (c >= 0xc2)
c >= 0xc2Description
TRUEnever evaluated
FALSEnever evaluated
0
34 {-
35 if (c < 0xe0)
c < 0xe0Description
TRUEnever evaluated
FALSEnever evaluated
0
36 {-
37 if (n >= 2)
n >= 2Description
TRUEnever evaluated
FALSEnever evaluated
0
38 {-
39 if ((s[1] ^ 0x80) < 0x40)
(s[1] ^ 0x80) < 0x40Description
TRUEnever evaluated
FALSEnever evaluated
0
40 {-
41 *puc = ((unsigned int) (c & 0x1f) << 6)-
42 | (unsigned int) (s[1] ^ 0x80);-
43 return 2;
never executed: return 2;
0
44 }-
45 /* invalid multibyte character */-
46 }
never executed: end of block
0
47 else-
48 {-
49 /* incomplete multibyte character */-
50 *puc = 0xfffd;-
51 return -2;
never executed: return -2;
0
52 }-
53 }-
54 else if (c < 0xf0)
c < 0xf0Description
TRUEnever evaluated
FALSEnever evaluated
0
55 {-
56 if (n >= 2)
n >= 2Description
TRUEnever evaluated
FALSEnever evaluated
0
57 {-
58 if ((s[1] ^ 0x80) < 0x40
(s[1] ^ 0x80) < 0x40Description
TRUEnever evaluated
FALSEnever evaluated
0
59 && (c >= 0xe1 || s[1] >= 0xa0)
c >= 0xe1Description
TRUEnever evaluated
FALSEnever evaluated
s[1] >= 0xa0Description
TRUEnever evaluated
FALSEnever evaluated
0
60 && (c != 0xed || s[1] < 0xa0))
c != 0xedDescription
TRUEnever evaluated
FALSEnever evaluated
s[1] < 0xa0Description
TRUEnever evaluated
FALSEnever evaluated
0
61 {-
62 if (n >= 3)
n >= 3Description
TRUEnever evaluated
FALSEnever evaluated
0
63 {-
64 if ((s[2] ^ 0x80) < 0x40)
(s[2] ^ 0x80) < 0x40Description
TRUEnever evaluated
FALSEnever evaluated
0
65 {-
66 *puc = ((unsigned int) (c & 0x0f) << 12)-
67 | ((unsigned int) (s[1] ^ 0x80) << 6)-
68 | (unsigned int) (s[2] ^ 0x80);-
69 return 3;
never executed: return 3;
0
70 }-
71 /* invalid multibyte character */-
72 }
never executed: end of block
0
73 else-
74 {-
75 /* incomplete multibyte character */-
76 *puc = 0xfffd;-
77 return -2;
never executed: return -2;
0
78 }-
79 }-
80 /* invalid multibyte character */-
81 }
never executed: end of block
0
82 else-
83 {-
84 /* incomplete multibyte character */-
85 *puc = 0xfffd;-
86 return -2;
never executed: return -2;
0
87 }-
88 }-
89 else if (c < 0xf8)
c < 0xf8Description
TRUEnever evaluated
FALSEnever evaluated
0
90 {-
91 if (n >= 2)
n >= 2Description
TRUEnever evaluated
FALSEnever evaluated
0
92 {-
93 if ((s[1] ^ 0x80) < 0x40
(s[1] ^ 0x80) < 0x40Description
TRUEnever evaluated
FALSEnever evaluated
0
94 && (c >= 0xf1 || s[1] >= 0x90)
c >= 0xf1Description
TRUEnever evaluated
FALSEnever evaluated
s[1] >= 0x90Description
TRUEnever evaluated
FALSEnever evaluated
0
95 && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90)))
c < 0xf4Description
TRUEnever evaluated
FALSEnever evaluated
c == 0xf4Description
TRUEnever evaluated
FALSEnever evaluated
s[1] < 0x90Description
TRUEnever evaluated
FALSEnever evaluated
0
96 {-
97 if (n >= 3)
n >= 3Description
TRUEnever evaluated
FALSEnever evaluated
0
98 {-
99 if ((s[2] ^ 0x80) < 0x40)
(s[2] ^ 0x80) < 0x40Description
TRUEnever evaluated
FALSEnever evaluated
0
100 {-
101 if (n >= 4)
n >= 4Description
TRUEnever evaluated
FALSEnever evaluated
0
102 {-
103 if ((s[3] ^ 0x80) < 0x40)
(s[3] ^ 0x80) < 0x40Description
TRUEnever evaluated
FALSEnever evaluated
0
104 {-
105 *puc = ((unsigned int) (c & 0x07) << 18)-
106 | ((unsigned int) (s[1] ^ 0x80) << 12)-
107 | ((unsigned int) (s[2] ^ 0x80) << 6)-
108 | (unsigned int) (s[3] ^ 0x80);-
109 return 4;
never executed: return 4;
0
110 }-
111 /* invalid multibyte character */-
112 }
never executed: end of block
0
113 else-
114 {-
115 /* incomplete multibyte character */-
116 *puc = 0xfffd;-
117 return -2;
never executed: return -2;
0
118 }-
119 }-
120 /* invalid multibyte character */-
121 }
never executed: end of block
0
122 else-
123 {-
124 /* incomplete multibyte character */-
125 *puc = 0xfffd;-
126 return -2;
never executed: return -2;
0
127 }-
128 }-
129 /* invalid multibyte character */-
130 }
never executed: end of block
0
131 else-
132 {-
133 /* incomplete multibyte character */-
134 *puc = 0xfffd;-
135 return -2;
never executed: return -2;
0
136 }-
137 }-
138 }
never executed: end of block
0
139 /* invalid multibyte character */-
140 *puc = 0xfffd;-
141 return -1;
never executed: return -1;
0
142}-
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