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(readline): Leave room for an extra byte

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after the newline; comm needs this for memcoll.
This commit is contained in:
Jim Meyering 1999-07-04 10:31:01 +00:00
parent 115372366e
commit bfd09e35cc
1 changed files with 4 additions and 3 deletions
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7
lib/linebuffer.c
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@ -40,7 +40,8 @@ initbuffer (struct linebuffer *linebuffer)
/* Read an arbitrarily long line of text from STREAM into LINEBUFFER.
Keep the newline; append a newline if it's the last line of a file
that ends in a non-newline character. Do not null terminate.
that ends in a non-newline character. Do not null terminate,
but leave room for an extra byte after the newline.
Return LINEBUFFER, except at end of file return 0. */
struct linebuffer *
@ -49,7 +50,7 @@ readline (struct linebuffer *linebuffer, FILE *stream)
int c;
char *buffer = linebuffer->buffer;
char *p = linebuffer->buffer;
char *end = buffer + linebuffer->size; /* Sentinel. */
char *end = buffer + linebuffer->size - 1; /* Sentinel. */
if (feof (stream) || ferror (stream))
return 0;
@ -71,7 +72,7 @@ readline (struct linebuffer *linebuffer, FILE *stream)
buffer = (char *) xrealloc (buffer, linebuffer->size);
p = p - linebuffer->buffer + buffer;
linebuffer->buffer = buffer;
end = buffer + linebuffer->size;
end = buffer + linebuffer->size - 1;
}
*p++ = c;
}