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#include "common.h"
#include "parse.h"
#include <stdlib.h>
struct option ccopt;
static void
flushstd(void)
{
ioflush(&bstdout);
ioflush(&bstderr);
}
static const char *
optval(const char *arg, const char *opt)
{
/* arg="foo=bar123"; opt="foo"; returns "bar123" */
uint n1 = strlen(arg), n2 = strlen(opt);
if (n1 < n2+1 || memcmp(arg, opt, n2) != 0 || arg[n2] != '=')
return NULL;
return arg + n2 + 1;
}
static void
optparse(const char **file, const char **targ, char **args)
{
const char *arg, *x;
*file = *targ = NULL;
while ((arg = *++args)) {
if (*arg++ != '-') {
*file = arg-1;
continue;
}
if ((x = optval(arg, "std"))) {
if (!strcmp(x, "c89")) ccopt.cstd = STDC89;
else if (!strcmp(x, "c99")) ccopt.cstd = STDC99;
else if (!strcmp(x, "c11")) ccopt.cstd = STDC11;
else if (!strcmp(x, "c2x")) ccopt.cstd = STDC23;
else if (!strcmp(x, "c23")) ccopt.cstd = STDC23;
else goto Bad;
} else Bad: warn(NULL, "invalid option: %'s", arg-1);
}
}
int
main(int argc, char **argv)
{
struct parser pr;
const char *file, *targ;
atexit(flushstd);
optparse(&file, &targ, argv);
if (!file) {
efmt("usage: %s [options] <file>\n", *argv);
return 1;
}
targ_init(targ ? targ : "amd64-sysv");
initparser(&pr, file);
parse(&pr);
}
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