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mbswidth.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/coreutils/src/gnulib/lib/mbswidth.c
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1/* Determine the number of screen columns needed for a string.-
2 Copyright (C) 2000-2018 Free Software Foundation, Inc.-
3-
4 This program is free software: you can redistribute it and/or modify-
5 it under the terms of the GNU General Public License as published by-
6 the Free Software Foundation; either version 3 of the License, or-
7 (at your option) any later version.-
8-
9 This program is distributed in the hope that it will be useful,-
10 but WITHOUT ANY WARRANTY; without even the implied warranty of-
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the-
12 GNU General Public License for more details.-
13-
14 You should have received a copy of the GNU General Public License-
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */-
16-
17/* Written by Bruno Haible <haible@clisp.cons.org>. */-
18-
19#include <config.h>-
20-
21/* Specification. */-
22#include "mbswidth.h"-
23-
24/* Get MB_CUR_MAX. */-
25#include <stdlib.h>-
26-
27#include <string.h>-
28-
29/* Get isprint(). */-
30#include <ctype.h>-
31-
32/* Get mbstate_t, mbrtowc(), mbsinit(), wcwidth(). */-
33#include <wchar.h>-
34-
35/* Get iswcntrl(). */-
36#include <wctype.h>-
37-
38/* Get INT_MAX. */-
39#include <limits.h>-
40-
41/* Returns the number of columns needed to represent the multibyte-
42 character string pointed to by STRING. If a non-printable character-
43 occurs, and MBSW_REJECT_UNPRINTABLE is specified, -1 is returned.-
44 With flags = MBSW_REJECT_INVALID | MBSW_REJECT_UNPRINTABLE, this is-
45 the multibyte analogue of the wcswidth function. */-
46int-
47mbswidth (const char *string, int flags)-
48{-
49 return mbsnwidth (string, strlen (string), flags);
executed 7664 times by 4 tests: return mbsnwidth (string, strlen (string), flags);
Executed by:
  • df
  • ls
  • pr
  • vdir
7664
50}-
51-
52/* Returns the number of columns needed to represent the multibyte-
53 character string pointed to by STRING of length NBYTES. If a-
54 non-printable character occurs, and MBSW_REJECT_UNPRINTABLE is-
55 specified, -1 is returned. */-
56int-
57mbsnwidth (const char *string, size_t nbytes, int flags)-
58{-
59 const char *p = string;-
60 const char *plimit = p + nbytes;-
61 int width;-
62-
63 width = 0;-
64 if (MB_CUR_MAX > 1)
(__ctype_get_m...ur_max ()) > 1Description
TRUEnever evaluated
FALSEevaluated 7886 times by 5 tests
Evaluated by:
  • df
  • ls
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  • sort
  • vdir
0-7886
65 {-
66 while (p < plimit)
p < plimitDescription
TRUEnever evaluated
FALSEnever evaluated
0
67 switch (*p)-
68 {-
69 case ' ': case '!': case '"': case '#': case '%':
never executed: case ' ':
never executed: case '!':
never executed: case '"':
never executed: case '#':
never executed: case '%':
0
70 case '&': case '\'': case '(': case ')': case '*':
never executed: case '&':
never executed: case '\'':
never executed: case '(':
never executed: case ')':
never executed: case '*':
0
71 case '+': case ',': case '-': case '.': case '/':
never executed: case '+':
never executed: case ',':
never executed: case '-':
never executed: case '.':
never executed: case '/':
0
72 case '0': case '1': case '2': case '3': case '4':
never executed: case '0':
never executed: case '1':
never executed: case '2':
never executed: case '3':
never executed: case '4':
0
73 case '5': case '6': case '7': case '8': case '9':
never executed: case '5':
never executed: case '6':
never executed: case '7':
never executed: case '8':
never executed: case '9':
0
74 case ':': case ';': case '<': case '=': case '>':
never executed: case ':':
never executed: case ';':
never executed: case '<':
never executed: case '=':
never executed: case '>':
0
75 case '?':
never executed: case '?':
0
76 case 'A': case 'B': case 'C': case 'D': case 'E':
never executed: case 'A':
never executed: case 'B':
never executed: case 'C':
never executed: case 'D':
never executed: case 'E':
0
77 case 'F': case 'G': case 'H': case 'I': case 'J':
never executed: case 'F':
never executed: case 'G':
never executed: case 'H':
never executed: case 'I':
never executed: case 'J':
0
78 case 'K': case 'L': case 'M': case 'N': case 'O':
never executed: case 'K':
never executed: case 'L':
never executed: case 'M':
never executed: case 'N':
never executed: case 'O':
0
79 case 'P': case 'Q': case 'R': case 'S': case 'T':
never executed: case 'P':
never executed: case 'Q':
never executed: case 'R':
never executed: case 'S':
never executed: case 'T':
0
80 case 'U': case 'V': case 'W': case 'X': case 'Y':
never executed: case 'U':
never executed: case 'V':
never executed: case 'W':
never executed: case 'X':
never executed: case 'Y':
0
81 case 'Z':
never executed: case 'Z':
0
82 case '[': case '\\': case ']': case '^': case '_':
never executed: case '[':
never executed: case '\\':
never executed: case ']':
never executed: case '^':
never executed: case '_':
0
83 case 'a': case 'b': case 'c': case 'd': case 'e':
never executed: case 'a':
never executed: case 'b':
never executed: case 'c':
never executed: case 'd':
never executed: case 'e':
0
84 case 'f': case 'g': case 'h': case 'i': case 'j':
never executed: case 'f':
never executed: case 'g':
never executed: case 'h':
never executed: case 'i':
never executed: case 'j':
0
85 case 'k': case 'l': case 'm': case 'n': case 'o':
never executed: case 'k':
never executed: case 'l':
never executed: case 'm':
never executed: case 'n':
never executed: case 'o':
0
86 case 'p': case 'q': case 'r': case 's': case 't':
never executed: case 'p':
never executed: case 'q':
never executed: case 'r':
never executed: case 's':
never executed: case 't':
0
87 case 'u': case 'v': case 'w': case 'x': case 'y':
never executed: case 'u':
never executed: case 'v':
never executed: case 'w':
never executed: case 'x':
never executed: case 'y':
0
88 case 'z': case '{': case '|': case '}': case '~':
never executed: case 'z':
never executed: case '{':
never executed: case '|':
never executed: case '}':
never executed: case '~':
0
89 /* These characters are printable ASCII characters. */-
90 p++;-
91 width++;-
92 break;
never executed: break;
0
93 default:
never executed: default:
0
94 /* If we have a multibyte sequence, scan it up to its end. */-
95 {-
96 mbstate_t mbstate;-
97 memset (&mbstate, 0, sizeof mbstate);-
98 do-
99 {-
100 wchar_t wc;-
101 size_t bytes;-
102 int w;-
103-
104 bytes = mbrtowc (&wc, p, plimit - p, &mbstate);-
105-
106 if (bytes == (size_t) -1)
bytes == (size_t) -1Description
TRUEnever evaluated
FALSEnever evaluated
0
107 /* An invalid multibyte sequence was encountered. */-
108 {-
109 if (!(flags & MBSW_REJECT_INVALID))
!(flags & 1)Description
TRUEnever evaluated
FALSEnever evaluated
0
110 {-
111 p++;-
112 width++;-
113 break;
never executed: break;
0
114 }-
115 else-
116 return -1;
never executed: return -1;
0
117 }-
118-
119 if (bytes == (size_t) -2)
bytes == (size_t) -2Description
TRUEnever evaluated
FALSEnever evaluated
0
120 /* An incomplete multibyte character at the end. */-
121 {-
122 if (!(flags & MBSW_REJECT_INVALID))
!(flags & 1)Description
TRUEnever evaluated
FALSEnever evaluated
0
123 {-
124 p = plimit;-
125 width++;-
126 break;
never executed: break;
0
127 }-
128 else-
129 return -1;
never executed: return -1;
0
130 }-
131-
132 if (bytes == 0)
bytes == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
133 /* A null wide character was encountered. */-
134 bytes = 1;
never executed: bytes = 1;
0
135-
136 w = wcwidth (wc);-
137 if (w >= 0)
w >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
138 /* A printable multibyte character. */-
139 {-
140 if (w > INT_MAX - width)
w > 0x7fffffff - widthDescription
TRUEnever evaluated
FALSEnever evaluated
0
141 goto overflow;
never executed: goto overflow;
0
142 width += w;-
143 }
never executed: end of block
0
144 else-
145 /* An unprintable multibyte character. */-
146 if (!(flags & MBSW_REJECT_UNPRINTABLE))
!(flags & 2)Description
TRUEnever evaluated
FALSEnever evaluated
0
147 {-
148 if (!iswcntrl (wc))
!iswcntrl (wc)Description
TRUEnever evaluated
FALSEnever evaluated
0
149 {-
150 if (width == INT_MAX)
width == 0x7fffffffDescription
TRUEnever evaluated
FALSEnever evaluated
0
151 goto overflow;
never executed: goto overflow;
0
152 width++;-
153 }
never executed: end of block
0
154 }
never executed: end of block
0
155 else-
156 return -1;
never executed: return -1;
0
157-
158 p += bytes;-
159 }
never executed: end of block
0
160 while (! mbsinit (&mbstate));
! mbsinit (&mbstate)Description
TRUEnever evaluated
FALSEnever evaluated
0
161 }-
162 break;
never executed: break;
0
163 }-
164 return width;
never executed: return width;
0
165 }-
166-
167 while (p < plimit)
p < plimitDescription
TRUEevaluated 48607 times by 5 tests
Evaluated by:
  • df
  • ls
  • pr
  • sort
  • vdir
FALSEevaluated 7886 times by 5 tests
Evaluated by:
  • df
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  • sort
  • vdir
7886-48607
168 {-
169 unsigned char c = (unsigned char) *p++;-
170-
171 if (isprint (c))
((*__ctype_b_l...int) _ISprint)Description
TRUEevaluated 48583 times by 5 tests
Evaluated by:
  • df
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  • vdir
FALSEevaluated 24 times by 1 test
Evaluated by:
  • sort
24-48583
172 {-
173 if (width == INT_MAX)
width == 0x7fffffffDescription
TRUEnever evaluated
FALSEevaluated 48583 times by 5 tests
Evaluated by:
  • df
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  • sort
  • vdir
0-48583
174 goto overflow;
never executed: goto overflow;
0
175 width++;-
176 }
executed 48583 times by 5 tests: end of block
Executed by:
  • df
  • ls
  • pr
  • sort
  • vdir
48583
177 else if (!(flags & MBSW_REJECT_UNPRINTABLE))
!(flags & 2)Description
TRUEevaluated 24 times by 1 test
Evaluated by:
  • sort
FALSEnever evaluated
0-24
178 {-
179 if (!iscntrl (c))
! ((*__ctype_b...int) _IScntrl)Description
TRUEnever evaluated
FALSEevaluated 24 times by 1 test
Evaluated by:
  • sort
0-24
180 {-
181 if (width == INT_MAX)
width == 0x7fffffffDescription
TRUEnever evaluated
FALSEnever evaluated
0
182 goto overflow;
never executed: goto overflow;
0
183 width++;-
184 }
never executed: end of block
0
185 }
executed 24 times by 1 test: end of block
Executed by:
  • sort
24
186 else-
187 return -1;
never executed: return -1;
0
188 }-
189 return width;
executed 7886 times by 5 tests: return width;
Executed by:
  • df
  • ls
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  • sort
  • vdir
7886
190-
191 overflow:-
192 return INT_MAX;
never executed: return 0x7fffffff;
0
193}-
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