OpenCoverage

xvasprintf.c

Absolute File Name:

/home/opencoverage/opencoverage/guest-scripts/coreutils/src/gnulib/lib/xvasprintf.c

Source code

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1 /* vasprintf and asprintf with out-of-memory checking. -

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 #include <config.h> -

18 -

19 /* Specification. */ -

20 #include "xvasprintf.h" -

21 -

22 #include <errno.h> -

23 #include <limits.h> -

24 #include <string.h> -

25 #include <stdio.h> -

26 -

27 #include "xalloc.h" -

28 -

29 /* Checked size_t computations. */ -

30 #include "xsize.h" -

31 -

32 static char * -

33 xstrcat (size_t argcount, va_list args) -

34 { -

35 char *result; -

36 va_list ap; -

37 size_t totalsize; -

38 size_t i; -

39 char *p; -

40 -

41 /* Determine the total size. */ -

42 totalsize = 0; -

43 va_copy (ap, args); -

for (i = argcount; i > 0; i--)

i > 0	Description
TRUE	evaluated 432 times by 1 test Evaluated by: stat
FALSE	evaluated 216 times by 1 test Evaluated by: stat

216-432

45 { -

46 const char *next = va_arg (ap, const char *); -

47 totalsize = xsum (totalsize, strlen (next)); -

}

executed 432 times by 1 test: end of block

Executed by:

stat

432

49 va_end (ap); -

50 -

51 /* Test for overflow in the summing pass above or in (totalsize + 1) below. -

52 Also, don't return a string longer than INT_MAX, for consistency with -

53 vasprintf(). */ -

if (totalsize == SIZE_MAX || totalsize > INT_MAX)

totalsize == (...73709551615UL)	Description
TRUE	never evaluated
FALSE	evaluated 216 times by 1 test Evaluated by: stat

totalsize > 0x7fffffff	Description
TRUE	never evaluated
FALSE	evaluated 216 times by 1 test Evaluated by: stat

0-216

55 { -

56 errno = EOVERFLOW; -

return NULL;

never executed: return ((void *)0) ;

58 } -

59 -

60 /* Allocate and fill the result string. */ -

61 result = XNMALLOC (totalsize + 1, char); -

62 p = result; -

for (i = argcount; i > 0; i--)

i > 0	Description
TRUE	evaluated 432 times by 1 test Evaluated by: stat
FALSE	evaluated 216 times by 1 test Evaluated by: stat

216-432

64 { -

65 const char *next = va_arg (args, const char *); -

66 size_t len = strlen (next); -

67 memcpy (p, next, len); -

68 p += len; -

}

executed 432 times by 1 test: end of block

Executed by:

stat

432

70 *p = '\0'; -

71 -

return result;

executed 216 times by 1 test: return result;

Executed by:

stat

216

73 } -

74 -

75 char * -

76 xvasprintf (const char *format, va_list args) -

77 { -

78 char *result; -

79 -

80 /* Recognize the special case format = "%s...%s". It is a frequently used -

81 idiom for string concatenation and needs to be fast. We don't want to -

82 have a separate function xstrcat() for this purpose. */ -

83 { -

84 size_t argcount = 0; -

85 const char *f; -

86 -

87 for (f = format;;) -

88 { -

if (*f == '\0')

*f == '\0'	Description
TRUE	evaluated 216 times by 1 test Evaluated by: stat
FALSE	evaluated 463 times by 3 tests Evaluated by: dd stat test

216-463

90 /* Recognized the special case of string concatenation. */ -

return xstrcat (argcount, args);

executed 216 times by 1 test: return xstrcat (argcount, args);

Executed by:

stat

216

if (*f != '%')

*f != '%'	Description
TRUE	evaluated 22 times by 2 tests Evaluated by: dd test
FALSE	evaluated 441 times by 2 tests Evaluated by: dd stat

22-441

break;

executed 22 times by 2 tests: break;

Executed by:

dd
test

94 f++; -

if (*f != 's')

*f != 's'	Description
TRUE	never evaluated
FALSE	evaluated 441 times by 2 tests Evaluated by: dd stat

0-441

break;

never executed: break;

97 f++; -

98 argcount++; -

}

executed 441 times by 2 tests: end of block

Executed by:

dd
stat

441

100 } -

101 -

102

if (vasprintf (&result, format, args) < 0)

vasprintf (&re...mat, args) < 0	Description
TRUE	never evaluated
FALSE	evaluated 22 times by 2 tests Evaluated by: dd test

0-22

103 { -

104

if (errno == ENOMEM)

(*__errno_location ()) == 12	Description
TRUE	never evaluated
FALSE	never evaluated

105

xalloc_die ();

never executed: xalloc_die ();

106

return NULL;

never executed: return ((void *)0) ;

107 } -

108 -

109

return result;

executed 22 times by 2 tests: return result;

Executed by:

dd
test

110 } -

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