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https://github.com/ascii-boxes/boxes.git
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Initial revision
This commit is contained in:
Thomas Jensen
229
src/boxes.c
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229
src/boxes.c
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#include <locale.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "boxes.h"
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extern char *optarg; /* for getopt() */
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extern int optind, opterr, optopt;
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extern FILE *yyin; /* lex input file */
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char *yyfilename = NULL; /* file name of config file used */
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design_t *designs = NULL; /* available box designs */
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int design_idx = 0; /* anz_designs-1 */
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int anz_designs = 0; /* no of designs after parsing */
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struct { /* command line options */
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int l; /* list available designs */
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} opt;
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int yyerror (const char *fmt, ...)
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{
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va_list ap;
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char buf[1024];
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va_start (ap, fmt);
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snprintf (buf, 1024-1, "%s: %s: line %d: ", PROJECT,
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yyfilename? yyfilename: "(null)", yylineno);
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vsnprintf (buf+strlen(buf), 1024-strlen(buf)-1, fmt, ap);
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strcat (buf, "\n");
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(void) fprintf (stderr, buf);
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va_end (ap);
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return 0;
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}
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void usage (FILE *st)
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{
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fprintf (st, "Usage: %s [options] [infile [outfile]]\n", PROJECT);
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fprintf (st, " -c box exchange current box for new box\n");
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fprintf (st, " -f file use only file as configuration file\n");
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fprintf (st, " -h usage information\n");
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fprintf (st, " -l generate listing of available box designs w/ samples\n");
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fprintf (st, " -r repair broken box\n");
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fprintf (st, " -s wxh resize box to width w and/or height h\n");
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fprintf (st, " -v print version information\n");
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fprintf (st, " -x remove box from text\n");
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}
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int process_commandline (int argc, char *argv[])
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{
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int oc; /* option character */
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FILE *f; /* potential input file */
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memset (&opt, 0, sizeof(opt));
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yyin = stdin;
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do {
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oc = getopt (argc, argv, "f:hlv");
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switch (oc) {
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case 'f':
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/*
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* Input File
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*/
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f = fopen (optarg, "r");
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if (f == NULL) {
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fprintf (stderr, "%s: Couldn\'t open config file \'%s\' "
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"for input.\n", PROJECT, optarg);
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return 1;
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}
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yyfilename = (char *) strdup (optarg);
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yyin = f;
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break;
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case 'h':
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/*
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* Display usage information and terminate
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*/
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printf ("%s - draws boxes around your text\n", PROJECT);
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printf (" (c) Thomas Jensen <tsjensen@stud.informatik.uni-erlangen.de>\n");
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printf (" Web page: http://home.pages.de/~jensen/%s/\n", PROJECT);
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usage (stdout);
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return 42;
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case 'l':
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/*
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* List available box styles
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*/
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opt.l = 1;
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break;
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case 'v':
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/*
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* Print version number
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*/
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printf ("%s version %s\n", PROJECT, VERSION);
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return 42;
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case ':': case '?':
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/*
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* Missing argument or illegal option - do nothing else
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*/
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return 1;
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case EOF:
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/*
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* End of list, do nothing more
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*/
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break;
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default: /* This case must never be */
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fprintf (stderr, "%s: Uh-oh! This should have been "
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"unreachable code. %%-)\n", PROJECT);
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return 1;
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}
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} while (oc != EOF);
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if (yyin == stdin) {
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fprintf (stderr, "%s: Could not find config file\n", PROJECT);
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return 1;
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}
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return 0;
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}
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int style_sort (const void *p1, const void *p2)
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{
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return strcasecmp ((const char *) ((*((design_t **) p1))->name),
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(const char *) ((*((design_t **) p2))->name));
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}
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int list_styles()
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{
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int i;
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design_t **list;
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list = (design_t **) calloc (design_idx+1, sizeof(design_t *));
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if (list == NULL) return 1;
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for (i=0; i<=design_idx; ++i)
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list[i] = &(designs[i]);
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qsort (list, design_idx+1, sizeof(design_t *), style_sort);
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printf ("Available Styles:\n");
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printf ("-----------------\n\n");
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for (i=0; i<=design_idx; ++i)
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printf ("%s (%s):\n\n%s\n\n", list[i]->name,
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list[i]->author? list[i]->author: "unknown artist",
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list[i]->sample);
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free (list);
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list = NULL;
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return 0;
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}
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int main (int argc, char *argv[])
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{
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extern int yyparse();
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int rc; /* general return code */
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design_t *tmp;
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rc = process_commandline (argc, argv);
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if (rc == 42) exit (EXIT_SUCCESS);
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if (rc) exit (EXIT_FAILURE);
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setlocale (LC_ALL, ""); /* mu<6D> des sein? TODO */
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designs = (design_t *) calloc (1, sizeof(design_t));
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if (designs == NULL) {
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perror (PROJECT);
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exit (EXIT_FAILURE);
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}
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/*
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* If the following parser is one created by lex, the application must
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* be careful to ensure that LC_CTYPE and LC_COLLATE are set to the
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* POSIX locale.
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*/
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rc = yyparse();
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if (rc) exit (EXIT_FAILURE);
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if (yyfilename) {
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free (yyfilename);
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yyfilename = NULL;
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}
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--design_idx;
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tmp = (design_t *) realloc (designs, (design_idx+1)*sizeof(design_t));
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if (tmp) {
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designs = tmp; /* yyparse() allocates space */
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} /* for one design too much */
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else {
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perror (PROJECT);
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exit (EXIT_FAILURE);
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}
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anz_designs = design_idx + 1;
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if (opt.l) {
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rc = list_styles();
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if (rc) {
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perror (PROJECT);
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exit (EXIT_FAILURE);
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}
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exit (EXIT_SUCCESS);
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}
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return EXIT_SUCCESS;
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}
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/*EOF*/ /* vim: set sw=4: */
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