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Diffstat (limited to 'libc-0.0.4/stdio1/idealgetline.c')
-rw-r--r-- | libc-0.0.4/stdio1/idealgetline.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/libc-0.0.4/stdio1/idealgetline.c b/libc-0.0.4/stdio1/idealgetline.c new file mode 100644 index 0000000..7eacc9e --- /dev/null +++ b/libc-0.0.4/stdio1/idealgetline.c @@ -0,0 +1,67 @@ +/* idealgetline.c -- my idea of an ideal getline function for stdio + Copyright (C) 1996 Joel N. Weber II <nemo@koa.iolani.honolulu.hi.us> + + 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 2 + 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, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* I actually intend to use this in 32 bit programs, unlike the other stuff + in this lib. IMHO GNU getline is broken. It is too hard to use. + + Just pass this function a FILE * and it will retrieve a line for you using + getc(). It will realloc() exactly the amount of memory needed, and will + generate error messages for non-ascii characters on stderr. + + This may not be your ideal. It probably generates far too many errors. + It doesn't work well for those who don't use English (but since + Linux-less-than-32 libc and kernels are each being produced by one + person in the US and one in the UK, this isn't a problem). It probably + is not what you (or I) want for interactive input. + + You're welcome to modify this routine to meet your needs. However, if + you change the semantics significantly, please change the name. + + (Maybe I should have put my own name on it so there will be no confusion + about who thought it was ideal). */ + +#include <stdio.h> +#include <malloc.h> + +char *idealgetline(f) +FILE *f; +{ + char c; + char *ret; + int size = 0, bufsize = 256; + + ret = malloc(256); + c = getc(f); + while ((c != EOF) && (c != '\n')){ + if ((c >= ' ') && (c <= 126)){ + ret[size] = c; + size++; + if (size == bufsize){ + bufsize += 256; + ret = realloc(ret, bufsize); + } + } else { + fprintf(stderr, "Unexpected character 0x%x encountered in input", c); + free(ret); + return 0; + } + } + ret[size] = '\0'; + size++; + return realloc(ret, size); +} |