| 1 | /* paste - laminate files Author: David Ihnat */
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| 2 |
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| 3 | /* Paste - a recreation of the Unix(Tm) paste(1) command.
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| 4 | *
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| 5 | * syntax: paste file1 file2 ... paste -dLIST file1 file2 ... paste -s [-dLIST]
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| 6 | * file1 file2 ...
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| 7 | *
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| 8 | * Copyright (C) 1984 by David M. Ihnat
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| 9 | *
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| 10 | * This program is a total rewrite of the Bell Laboratories Unix(Tm) command of
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| 11 | * the same name, as of System V. It contains no proprietary code, and
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| 12 | * therefore may be used without violation of any proprietary agreements
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| 13 | * whatsoever. However, you will notice that the program is copyrighted by
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| 14 | * me. This is to assure the program does *not* fall into the public domain.
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| 15 | * Thus, I may specify just what I am now: This program may be freely copied
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| 16 | * and distributed, provided this notice remains; it may not be sold for
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| 17 | * profit without express written consent of the author. Please note that I
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| 18 | * recreated the behavior of the Unix(Tm) 'paste' command as faithfully as
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| 19 | * possible, with minor exceptions (noted below); however, I haven't run a
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| 20 | * full set of regression * tests. Thus, the user of this program accepts
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| 21 | * full responsibility for any effects or loss; in particular, the author is
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| 22 | * not responsible for any losses, explicit or incidental, that may be
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| 23 | * incurred through use of this program.
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| 24 | *
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| 25 | * The changes to the program, with one exception, are transparent to a user
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| 26 | * familiar with the Unix command of the same name. These changes are:
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| 27 | *
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| 28 | * 1) The '-s' option had a bug in the Unix version when used with multiple
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| 29 | * files. (It would repeat each file in a list, i.e., for
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| 30 | *
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| 31 | * paste -s file1 file2 file3
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| 32 | *
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| 33 | * it would list
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| 34 | *
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| 35 | * <file1\n><file1\n><file2\n><file1\n><file2\n><file3\n>
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| 36 | *
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| 37 | * I fixed this, and reported the bug to the providers of the command in Unix.
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| 38 | *
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| 39 | * 2) The list of valid escape sequences has been expanded to include \b,\f,
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| 40 | * and \r. (Just because *I* can't imagine why you'd want to use them
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| 41 | * doesn't mean I should keep them from you.)
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| 42 | *
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| 43 | * 3) There is no longer any restriction on line length.
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| 44 | *
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| 45 | * I ask that any bugs (and, if possible, fixes) be reported to me when
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| 46 | * possible. -David Ihnat (312) 784-4544 ihuxx!ignatz
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| 47 | */
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| 48 |
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| 49 | /* Modified to run under MINIX 1.1 by David O. Tinker (416) 978-3636
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| 50 | * (utgpu!dtinker) Sept. 19, 1987
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| 51 | */
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| 52 |
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| 53 | /* Modified to conform to POSIX 1003.2/Draft10 standard 23rd Sept. 1990
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| 54 | * Changes:
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| 55 | * - the arguments can be in any order
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| 56 | * - removed the ToUpper function
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| 57 | * by Thomas Brupbacher (tobr@mw.lpc.ethz.ch)
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| 58 | */
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| 59 |
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| 60 | #include <errno.h>
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| 61 | #include <ctype.h>
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| 62 | #include <stdlib.h>
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| 63 | #include <string.h>
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| 64 | #include <stdio.h>
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| 65 |
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| 66 | /* I'd love to use enums, but not everyone has them. Portability, y'know. */
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| 67 | #define NODELIM 1
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| 68 | #define USAGE 2
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| 69 | #define BADFILE 3
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| 70 | #define TOOMANY 4
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| 71 |
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| 72 | #define TAB '\t'
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| 73 | #define NL '\n'
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| 74 | #define BS '\b'
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| 75 | #define FF '\f'
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| 76 | #define CR '\r'
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| 77 | #define DEL '\177'
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| 78 | #define SPACE ' '
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| 79 | #define BACKSLASH '\\'
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| 80 |
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| 81 | #define _MAXSZ 512
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| 82 | #define _MAXFILES 12
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| 83 | #define CLOSED ((FILE *)-1)
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| 84 | #define ENDLIST ((FILE *)-2)
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| 85 |
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| 86 | char *cmdnam;
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| 87 |
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| 88 | short int sflag;
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| 89 | static char default_delims[] = {TAB}; /* default delimiter string */
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| 90 | char *delims; /* the pointer to the delimiters */
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| 91 | int number_of_delims = 1; /* number of delimiters to use */
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| 92 |
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| 93 | _PROTOTYPE(int main, (int argc, char **argv));
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| 94 | _PROTOTYPE(void docol, (int nfiles, char **fnamptr));
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| 95 | _PROTOTYPE(void doserial, (int nfiles, char **fnamptr));
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| 96 | _PROTOTYPE(void delimbuild, (char *strptr));
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| 97 | _PROTOTYPE(void prerr, (int etype, char *estring));
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| 98 |
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| 99 | int main(argc, argv)
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| 100 | int argc;
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| 101 | char **argv;
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| 102 | {
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| 103 | char **arg_ptr; /* used to save argv, needed for docol() etc */
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| 104 | int num_files = 0; /* Number of filenames specified on cmd line */
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| 105 | sflag = 0;
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| 106 | delims = default_delims; /* use default delimiters */
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| 107 |
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| 108 | cmdnam = *argv;
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| 109 |
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| 110 | if (argc >= 2) {
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| 111 |
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| 112 | /* Skip invocation name */
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| 113 | argv++;
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| 114 | argc--;
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| 115 |
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| 116 | /* Save argv */
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| 117 | arg_ptr = argv;
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| 118 | /* First, parse input options */
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| 119 |
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| 120 | while (argc-- > 0) {
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| 121 | if (argv[0][0] == '-' && argv[0][1] != '\0') {
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| 122 | switch (argv[0][1]) {
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| 123 | case 'd':
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| 124 | /* Delimiter character(s) */
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| 125 | if (*(++argv) == '\0')
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| 126 | prerr(NODELIM, "");
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| 127 | else
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| 128 | delimbuild(*(argv));
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| 129 | argc--;
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| 130 | break;
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| 131 |
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| 132 | case 's': sflag++; break;
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| 133 |
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| 134 | default: prerr(USAGE, "");
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| 135 | }
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| 136 | argv++;
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| 137 | } else {
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| 138 | num_files++;
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| 139 | argv++;
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| 140 | }
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| 141 | }
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| 142 |
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| 143 | /* If there are more than MAX_FILES files on the command
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| 144 | * line, exit with error message. */
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| 145 | if (num_files > _MAXFILES) prerr(TOOMANY, "");
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| 146 |
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| 147 | /* If no files specified, simply exit. Otherwise, if not the
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| 148 | * old '-s' option, process all files. If '-s', then process
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| 149 | * files one-at-a-time. */
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| 150 |
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| 151 | if (!sflag)
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| 152 | docol(num_files, arg_ptr); /* Column paste */
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| 153 | else
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| 154 | doserial(num_files, arg_ptr); /* Serial paste */
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| 155 |
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| 156 | exit(0);
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| 157 | } else
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| 158 | prerr(USAGE, "");
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| 159 | return(0);
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| 160 | }
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| 161 |
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| 162 | void docol(nfiles, fnamptr)
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| 163 | int nfiles;
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| 164 | char **fnamptr;
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| 165 | {
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| 166 | char iobuff[_MAXSZ]; /* i/o buffer for the fgets */
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| 167 | short int somedone; /* flag for blank field handling */
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| 168 |
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| 169 | /* There is a strange case where all files are just ready to be
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| 170 | * closed, or will on this round. In that case, the string of
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| 171 | * delimiters must be preserved. delbuf[1] ->delbuf[MAXFILES+1]
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| 172 | * provides intermediate storage for closed files, if needed;
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| 173 | * delbuf[0] is the current index.
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| 174 | */
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| 175 | char delbuf[_MAXFILES + 2];
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| 176 |
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| 177 | FILE *fileptr[_MAXFILES + 1];
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| 178 |
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| 179 | int filecnt; /* Set to number of files to process */
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| 180 | register char *delimptr; /* Cycling delimiter pointer */
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| 181 | int index; /* Working variable */
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| 182 | int strend; /* End of string in buffer */
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| 183 |
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| 184 | /* Perform column paste. First, attempt to open all files. (This
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| 185 | * could be expanded to an infinite number of files, but at the
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| 186 | * (considerable) expense of remembering the file and its current
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| 187 | * offset, then opening/reading/closing. The commands' utility
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| 188 | * doesn't warrant the effort; at least, to me...)
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| 189 | */
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| 190 |
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| 191 | for (filecnt = 0; (nfiles > 0); fnamptr++) {
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| 192 | if ((fnamptr[0][0] == '-') && (fnamptr[0][1] != '\0')) {
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| 193 | if (fnamptr[0][1] == 'd') fnamptr++;
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| 194 | } else {
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| 195 | nfiles--;
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| 196 | if (fnamptr[0][0] == '-') {
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| 197 | fileptr[filecnt++] = stdin;
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| 198 | } else {
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| 199 | fileptr[filecnt] = fopen(fnamptr[0], "r");
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| 200 | if (fileptr[filecnt++] == NULL)
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| 201 | prerr(BADFILE, *fnamptr);
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| 202 | }
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| 203 | }
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| 204 | }
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| 205 |
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| 206 | fileptr[filecnt] = ENDLIST; /* End of list. */
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| 207 |
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| 208 | /* Have all files. Now, read a line from each file, and output to
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| 209 | * stdout. Notice that the old 511 character limitation on the line
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| 210 | * length no longer applies, since this program doesn't do the
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| 211 | * buffering. Do this until you go through the loop and don't
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| 212 | * successfully read from any of the files.
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| 213 | */
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| 214 | for (; filecnt;) {
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| 215 | somedone = 0; /* Blank field handling flag */
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| 216 | delimptr = delims; /* Start at beginning of delim list */
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| 217 | delbuf[0] = 0; /* No squirreled delims */
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| 218 |
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| 219 | for (index = 0; (fileptr[index] != ENDLIST) && filecnt; index++) {
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| 220 | /* Read a line and immediately output. If it's too
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| 221 | * big for the buffer, then dump what was read and go
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| 222 | * back for more.
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| 223 | *
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| 224 | * Otherwise, if it is from the last file, then leave
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| 225 | * the carriage return in place; if not, replace with
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| 226 | * a delimiter (if any)
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| 227 | */
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| 228 |
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| 229 | strend = 0; /* Set so can easily detect EOF */
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| 230 |
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| 231 | if (fileptr[index] != CLOSED)
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| 232 | while (fgets(iobuff, (_MAXSZ - 1),
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| 233 | fileptr[index]) != NULL) {
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| 234 | strend = strlen(iobuff);/* Did the buf fill? */
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| 235 |
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| 236 | if (strend == (_MAXSZ - 1)) {
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| 237 | /* Gosh, what a long line. */
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| 238 | fputs(iobuff, stdout);
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| 239 | strend = 0;
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| 240 | continue;
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| 241 | }
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| 242 |
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| 243 | /* Ok got whole line in buffer. */
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| 244 | break; /* Out of loop for this file */
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| 245 | }
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| 246 |
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| 247 | /* Ended either on an EOF (well, actually NULL
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| 248 | * return-- it *could* be some sort of file error,
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| 249 | * but but if the file was opened successfully, this
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| 250 | * is unlikely. Besides, error checking on streams
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| 251 | * doesn't allow us to decide exactly what went
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| 252 | * wrong, so I'm going to be very Unix-like and
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| 253 | * ignore it!), or a closed file, or a received line.
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| 254 | * If an EOF, close the file and mark it in the list.
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| 255 | * In any case, output the delimiter of choice.
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| 256 | */
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| 257 |
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| 258 | if (!strend) {
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| 259 | if (fileptr[index] != CLOSED) {
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| 260 | fclose(fileptr[index]);
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| 261 | fileptr[index] = CLOSED;
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| 262 | filecnt--;
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| 263 | }
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| 264 |
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| 265 | /* Is this the end of the whole thing? */
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| 266 | if ((fileptr[index + 1] == ENDLIST) && !somedone)
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| 267 | continue; /* EXITS */
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| 268 |
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| 269 | /* Ok, some files not closed this line. Last file? */
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| 270 | if (fileptr[index + 1] == ENDLIST) {
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| 271 | if (delbuf[0]) {
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| 272 | fputs(&delbuf[1], stdout);
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| 273 | delbuf[0] = 0;
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| 274 | }
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| 275 | putc((int) NL, stdout);
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| 276 | continue; /* Next read of files */
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| 277 | } else {
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| 278 | /* Closed file; setup delim */
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| 279 | if (*delimptr != DEL) {
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| 280 | delbuf[0]++;
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| 281 | delbuf[delbuf[0]] = *delimptr++;
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| 282 | delbuf[delbuf[0] + 1] = '\0';
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| 283 | } else
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| 284 | delimptr++;
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| 285 | }
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| 286 |
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| 287 | /* Reset end of delimiter string if necessary */
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| 288 | if (*delimptr == '\0') delimptr = delims;
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| 289 | } else {
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| 290 | /* Some data read. */
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| 291 | somedone++;
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| 292 |
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| 293 | /* Any saved delims? */
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| 294 | if (delbuf[0]) {
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| 295 | fputs(&delbuf[1], stdout);
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| 296 | delbuf[0] = 0;
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| 297 | }
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| 298 |
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| 299 | /* If last file, last char will be NL. */
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| 300 | if (fileptr[index + 1] != ENDLIST) {
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| 301 | if (*delimptr == DEL) {
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| 302 | delimptr++;
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| 303 | iobuff[strend - 1] = '\0';/* No delim*/
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| 304 | } else
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| 305 | iobuff[strend - 1] = *delimptr++;
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| 306 | }
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| 307 | if (*delimptr == '\0') delimptr = delims;
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| 308 |
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| 309 | /* Now dump the buffer */
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| 310 | fputs(iobuff, stdout);
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| 311 | fflush(stdout);
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| 312 | }
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| 313 | }
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| 314 | }
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| 315 | }
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| 316 |
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| 317 | void doserial(nfiles, fnamptr)
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| 318 | int nfiles;
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| 319 | char **fnamptr;
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| 320 | {
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| 321 | /* Do serial paste. Simply scarf characters, performing
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| 322 | * one-character buffering to facilitate delim processing.
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| 323 | */
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| 324 |
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| 325 | register int charnew, charold;
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| 326 | register char *delimptr;
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| 327 |
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| 328 | register FILE *fileptr;
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| 329 |
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| 330 | for (; nfiles != 0; fnamptr++) {
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| 331 | if ((fnamptr[0][0] == '-') && (fnamptr[0][1] != '\0')) {
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| 332 | if (fnamptr[0][1] == 'd') fnamptr++;
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| 333 | } else {
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| 334 | if (fnamptr[0][0] == '-') {
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| 335 | fileptr = stdin;
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| 336 | } else {
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| 337 | fileptr = fopen(*fnamptr, "r");
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| 338 |
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| 339 | if (fileptr == NULL) prerr(BADFILE, *fnamptr);
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| 340 | }
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| 341 |
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| 342 | /* The file is open; just keep taking characters,
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| 343 | * stashing them in charnew; output charold,
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| 344 | * converting to the appropriate delimiter character
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| 345 | * if needful. After the EOF, simply output
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| 346 | * 'charold' if it's a newline; otherwise, output it
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| 347 | * and then a newline.
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| 348 | */
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| 349 |
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| 350 | delimptr = delims; /* Set up for delimiter string */
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| 351 |
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| 352 | if ((charold = getc(fileptr)) == EOF) {
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| 353 | /* Empty file! */
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| 354 | putc(NL, stdout);
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| 355 | fflush(stdout);
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| 356 | continue; /* Go on to the next file */
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| 357 | }
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| 358 |
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| 359 | /* Ok, 'charold' is set up. Hit it! */
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| 360 |
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| 361 | while ((charnew = getc(fileptr)) != EOF) {
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| 362 | /* Ok, process the old character */
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| 363 | if (charold == NL) {
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| 364 | if (*delimptr != DEL)
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| 365 | putc((int) *delimptr++, stdout);
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| 366 |
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| 367 | /* Reset pointer at end of delimiter string */
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| 368 | if (*delimptr == '\0') delimptr = delims;
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| 369 | } else
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| 370 | putc(charold, stdout);
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| 371 |
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| 372 | charold = charnew;
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| 373 | }
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| 374 |
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| 375 | /* Ok, hit EOF. Process that last character */
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| 376 |
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| 377 | putc(charold, stdout);
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| 378 | if ((char) charold != NL) putc(NL, stdout);
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| 379 | fflush(stdout);
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| 380 | nfiles--;
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| 381 | }
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| 382 | }
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| 383 | }
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| 384 |
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| 385 | void delimbuild(strptr)
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| 386 | char *strptr;
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| 387 | {
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| 388 | /* Process the delimiter string into something that can be used by
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| 389 | * the routines. This involves, primarily, collapsing the backslash
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| 390 | * representations of special characters into their actual values,
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| 391 | * and terminating the string in a manner that the routines can
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| 392 | * recognize. The set of possible backslash characters has been
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| 393 | * expanded beyond that recognized by the vanilla Unix(Tm) version.
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| 394 | */
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| 395 |
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| 396 | register char *strout;
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| 397 |
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| 398 | delims = strptr; /* delims now points to argv[...] */
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| 399 | strout = strptr; /* Start at the same place, anyway */
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| 400 |
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| 401 | while (*strptr) {
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| 402 | if (*strptr != '\\') /* Is it an escape character? */
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| 403 | *strout++ = *strptr++; /* No, just transfer it */
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| 404 | else {
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| 405 | strptr++; /* Get past escape character */
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| 406 |
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| 407 | switch (*strptr) {
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| 408 | case '0': *strout++ = DEL; break;
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| 409 |
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| 410 | case 't': *strout++ = TAB; break;
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| 411 |
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|---|
| 412 | case 'n': *strout++ = NL; break;
|
|---|
| 413 |
|
|---|
| 414 | case 'b': *strout++ = BS; break;
|
|---|
| 415 |
|
|---|
| 416 | case 'f': *strout++ = FF; break;
|
|---|
| 417 |
|
|---|
| 418 | case 'r': *strout++ = CR; break;
|
|---|
| 419 |
|
|---|
| 420 | case '\\':
|
|---|
| 421 | *strout++ = BACKSLASH;
|
|---|
| 422 | break;
|
|---|
| 423 |
|
|---|
| 424 | default: *strout++ = *strptr;
|
|---|
| 425 | }
|
|---|
| 426 |
|
|---|
| 427 | strptr++;
|
|---|
| 428 | }
|
|---|
| 429 |
|
|---|
| 430 | }
|
|---|
| 431 | *strout = '\0'; /* Heaven forfend that we forget this! */
|
|---|
| 432 | }
|
|---|
| 433 |
|
|---|
| 434 | void prerr(etype, estring)
|
|---|
| 435 | int etype;
|
|---|
| 436 | char *estring;
|
|---|
| 437 | {
|
|---|
| 438 | switch (etype) {
|
|---|
| 439 | case USAGE:
|
|---|
| 440 | fprintf(stderr, "%s : Usage: %s [-s] [-d <delimiters>] file1 file2 ...\n", cmdnam, cmdnam);
|
|---|
| 441 | break;
|
|---|
| 442 |
|
|---|
| 443 | case NODELIM:
|
|---|
| 444 | fprintf(stderr, "%s : no delimiters\n", cmdnam);
|
|---|
| 445 | break;
|
|---|
| 446 |
|
|---|
| 447 | case BADFILE:
|
|---|
| 448 | fprintf(stderr, "%s : %s : cannot open\n", cmdnam, estring);
|
|---|
| 449 | break;
|
|---|
| 450 |
|
|---|
| 451 | case TOOMANY:
|
|---|
| 452 | fprintf(stderr, "%s : too many files\n", cmdnam);
|
|---|
| 453 | break;
|
|---|
| 454 | }
|
|---|
| 455 | exit(1);
|
|---|
| 456 | }
|
|---|
