linebuffer.c

Absolute File Name:

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

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Source

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/* linebuffer.c -- read arbitrarily long lines

Free Software Foundation, Inc.

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <https://www.gnu.org/licenses/>. */

/* Written by Richard Stallman. */

#include <config.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/types.h>

#include "linebuffer.h"

#include "xalloc.h"

#if USE_UNLOCKED_IO

# include "unlocked-io.h"

#endif

/* Initialize linebuffer LINEBUFFER for use. */

void

initbuffer (struct linebuffer *linebuffer)

{

memset (linebuffer, 0, sizeof *linebuffer);

}

executed 1403 times by 3 tests: end of block

Executed by:

comm
nl
uniq

1403

struct linebuffer *

readlinebuffer (struct linebuffer *linebuffer, FILE *stream)

{

return readlinebuffer_delim (linebuffer, stream, '\n');

executed 70 times by 1 test: return readlinebuffer_delim (linebuffer, stream, '\n');

Executed by:

}

/* Read an arbitrarily long line of text from STREAM into LINEBUFFER.

Consider lines to be terminated by DELIMITER.

Keep the delimiter; append DELIMITER if it's the last line of a file

that ends in a character other than DELIMITER. Do not NUL-terminate.

Therefore the stream can contain NUL bytes, and the length

(including the delimiter) is returned in linebuffer->length.

Return NULL when stream is empty. Return NULL and set errno upon

error; callers can distinguish this case from the empty case by

invoking ferror (stream).

Otherwise, return LINEBUFFER. */

struct linebuffer *

readlinebuffer_delim (struct linebuffer *linebuffer, FILE *stream,

char delimiter)

{

int c;

char *buffer = linebuffer->buffer;

char *p = linebuffer->buffer;

char *end = buffer + linebuffer->size; /* Sentinel. */

if (feof (stream))

feof_unlocked (stream)	Description
TRUE	evaluated 72 times by 2 tests Evaluated by: comm join
FALSE	evaluated 3211 times by 4 tests Evaluated by: comm join nl uniq

72-3211

return NULL;

executed 72 times by 2 tests: return ((void *)0) ;

Executed by:

comm
join

{

c = getc (stream);

if (c == EOF)

c == (-1)	Description
TRUE	evaluated 775 times by 4 tests Evaluated by: comm join nl uniq
FALSE	evaluated 128233 times by 4 tests Evaluated by: comm join nl uniq

775-128233

{

if (p == buffer || ferror (stream))

p == buffer	Description
TRUE	evaluated 644 times by 4 tests Evaluated by: comm join nl uniq
FALSE	evaluated 131 times by 3 tests Evaluated by: comm join uniq

ferror_unlocked (stream)	Description
TRUE	never evaluated
FALSE	evaluated 131 times by 3 tests Evaluated by: comm join uniq

0-644

return NULL;

executed 644 times by 4 tests: return ((void *)0) ;

Executed by:

comm
join
nl
uniq

644

if (p[-1] == delimiter)

p[-1] == delimiter	Description
TRUE	never evaluated
FALSE	evaluated 131 times by 3 tests Evaluated by: comm join uniq

0-131

break;

never executed: break;

c = delimiter;

}

executed 131 times by 3 tests: end of block

Executed by:

comm
join
uniq

131

if (p == end)

p == end	Description
TRUE	evaluated 1693 times by 4 tests Evaluated by: comm join nl uniq
FALSE	evaluated 126671 times by 4 tests Evaluated by: comm join nl uniq

1693-126671

{

size_t oldsize = linebuffer->size;

buffer = x2realloc (buffer, &linebuffer->size);

p = buffer + oldsize;

linebuffer->buffer = buffer;

end = buffer + linebuffer->size;

}

executed 1693 times by 4 tests: end of block

Executed by:

comm
join
nl
uniq

1693

*p++ = c;

}

executed 128364 times by 4 tests: end of block

Executed by:

comm
join
nl
uniq

128364

while (c != delimiter);

c != delimiter	Description
TRUE	evaluated 125797 times by 4 tests Evaluated by: comm join nl uniq
FALSE	evaluated 2567 times by 4 tests Evaluated by: comm join nl uniq

2567-125797

linebuffer->length = p - buffer;

return linebuffer;

executed 2567 times by 4 tests: return linebuffer;

Executed by:

comm
join
nl
uniq

2567

}

/* Free the buffer that was allocated for linebuffer LINEBUFFER. */

void

100

freebuffer (struct linebuffer *linebuffer)

101

{

102

free (linebuffer->buffer);

103

}

never executed: end of block

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