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#include "../preproc/preproc.h"
#include "../preproc/pproto.h"
char *progname = "pp";
/*
* Establish command-line options.
*/
static char *ostr = "+CPD:I:U:o:";
static char *options =
"[-C] [-P] [-Dname[=[text]]] [-Uname] [-Ipath] [-ofile] [files]";
extern line_cntrl;
/*
* getopt() variables
*/
extern int optind; /* index into parent argv vector */
extern int optopt; /* character checked for validity */
extern char *optarg; /* argument associated with option */
int main(argc, argv)
int argc;
char **argv;
{
int c;
char *opt_lst;
char **opt_args;
int nopts;
FILE *out_file;
/*
* By default, keep the image of white space, but replace each comment
* by a space. By default, output #line directives.
*/
whsp_image = NoComment;
line_cntrl = 1;
/*
* The number of options that must be passed on to other phases
* of the preprocessor are at most as large as the entire option
* list.
*/
opt_lst = alloc(argc);
opt_args = alloc(argc * sizeof (char *));
nopts = 0;
out_file = stdout;
/*
* Process options.
*/
while ((c = getopt(argc, argv, ostr)) != EOF)
switch (c) {
case 'C': /* -C - retan comments */
whsp_image = FullImage;
break;
case 'P': /* -P - do not output #line directives */
line_cntrl = 0;
break;
case 'D': /* -D<id><definition> - predefine an identifier */
case 'I': /* -I<path> - location to search for standard header files */
case 'U': /* -U<id> - undefine predefined identifier */
opt_lst[nopts] = c;
opt_args[nopts] = optarg;
++nopts;
break;
case 'o': /* -o<file> - write output to this file */
out_file = fopen(optarg, "w");
if (out_file == NULL)
err2("cannot open output file ", optarg);
break;
default:
show_usage();
}
opt_lst[nopts] = '\0';
/*
* Scan file name arguments. If there are none, process standard input,
* indicated by the name "-".
*/
if (optind == argc) {
init_preproc("-", opt_lst, opt_args);
output(out_file);
}
else {
while (optind < argc) {
init_preproc(argv[optind], opt_lst, opt_args);
output(out_file);
optind++;
}
}
return EXIT_SUCCESS;
}
/*
* Print an error message if called incorrectly.
*/
void show_usage()
{
fprintf(stderr, "usage: %s %s\n", progname, options);
exit(EXIT_FAILURE);
}
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