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#include <stdio.h>
#include <string.h>
#include "u816.h"
extern const char *self;
void bad_atari_filename(const char *fname, const char *msg) {
char fn[50] = "";
char xbuf[5];
int i;
u8 c;
for(i = 0; (c = (u8)fname[i]) && i < 12; i++) {
if(c < ' ' || c > '|') {
/* not printable, insert a hex escape */
sprintf(xbuf, "$%02X", c);
strcat(fn, xbuf);
} else {
strncat(fn, (char *)&c, 1);
}
}
fprintf(stderr, "%s: warning: bad Atari filename \"%s\": %s\n", self, fn, msg);
}
/* note to self: it's tempting to use isalpha(), isprint(), etc
from ctype.h... but those are locale-aware. we want ASCII-only
versions. */
void sanity_check_filename(const char *fname) {
u8 c;
unsigned int i, bad = 0, dots = 0, uscore = 0;
c = fname[0];
if(!c) {
bad_atari_filename(fname, "empty!");
return;
} else if(c < 'A' || c > 'Z') {
bad_atari_filename(fname, "does not begin with A-Z");
}
for(i = 0; (i < 12) && (c = fname[i]); i++) {
if(c >= 'A' && c <= 'Z')
continue;
if(c >= '0' && c <= '9')
continue;
if(c == '_') {
uscore++;
continue;
}
if(c == '.') {
dots++;
continue;
}
bad++;
}
if(!dots) {
bad_atari_filename(fname, "no \".\"");
} else if(dots > 1) {
bad_atari_filename(fname, "more than one \".\"");
}
if(bad)
bad_atari_filename(fname, "invalid characters.");
else if(uscore)
fprintf(stderr, "%s: filename has underscore, OK on Sparta/MyDOS, not Atari DOS 2.x\n", self);
}
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