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allow full-line comments in tiles source files

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Accept
<start of line><optional whitespace>#<anything>
as a comment in win/share/{monsters,objects,other}.txt.  Existing
<start of line><optional whitespace># tile <rest of line>
is grandfathered in as data.

It wouldn't take much more to accept
<data><optional whitespace>#<rest of line>
comments too but this hasn't gone that far.

Reading the colormap at the beginning of each of the three files
used "%[A-Za-z0-i]" to read one characer into a two-character array.
Change that to "%1[A-Za-z0-9]" so that it can't overflow the buffer
if the input data gets accidentally or maliciously mangled.  (Not a
security issue.)

Remove a spurious blank line from objects.txt.

Also, clean up some warnings when compiling gifread.c for gif2txt
although I ultimately didn't do anything with that.
This commit is contained in:
PatR
2023-01-08 01:33:18 -08:00
parent f0f639f1fa
commit 1755d27bf8
3 changed files with 103 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files

130
win/share/tiletext.c
View File

@@ -18,16 +18,19 @@ static int placeholder_init = 0;
static pixel placeholder[TILE_Y][TILE_X];
static FILE *tile_file;
static int tile_set, tile_set_indx;
static const char *const text_sets[] = {
#if (TILE_X == 8)
static const char *text_sets[] = { "monthin.txt", "objthin.txt",
"oththin.txt" };
"monthin.txt", "objthin.txt", "oththin.txt"
#else
static const char *text_sets[] = { "monsters.txt", "objects.txt",
"other.txt" };
"monsters.txt", "objects.txt", "other.txt"
#endif
};
static char inbuf[BUFSZ];
extern const char *tilename(int, int, int);
extern boolean acceptable_tilename(int, int, const char *, const char *);
static int get_next_line(FILE *, boolean);
static void read_text_colormap(FILE *);
static boolean write_text_colormap(FILE *);
static boolean read_txttile(FILE *, pixel (*)[TILE_X]);
@@ -36,8 +39,8 @@ static void write_txttile(FILE *, pixel (*)[TILE_X]);
enum { MONSTER_SET, OBJECT_SET, OTHER_SET};
/* Ugh. DICE doesn't like %[A-Z], so we have to spell it out... */
#define FORMAT_STRING \
"%[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.] = " \
#define FORMAT_STRING \
"%1[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.] = " \
"(%d, %d, %d) "
/*
@@ -91,6 +94,36 @@ set_grayscale(int gs)
grayscale = gs;
}
/* read next line; repeat until it's a non-comment; populates 'inbuf[]';
the buffer might already have data (first line after colormap) */
static int
get_next_line(FILE *txtfile, boolean force)
{
int ch;
for (;;) {
if (force || !inbuf[0]) {
/* skip leading whitespace */
do {
ch = fgetc(txtfile);
} while (ch == ' ');
ungetc(ch, txtfile);
/* get rest of line */
if (!fgets(inbuf, BUFSZ, txtfile))
break;
force = TRUE;
/* ignore blank lines;
the old fscanf() processing did that, possibly by accident */
if (!inbuf[0] || (inbuf[0] == '\n' && !inbuf[1]))
continue;
}
if (inbuf[0] != '#' || !strncmp(inbuf, "# tile ", 7))
return 1;
}
inbuf[0] = '\0';
return 0;
}
static void
read_text_colormap(FILE *txtfile)
{
@@ -101,7 +134,9 @@ read_text_colormap(FILE *txtfile)
color_index[i] = -1;
num_colors = 0;
while (fscanf(txtfile, FORMAT_STRING, c, &r, &g, &b) == 4) {
while (get_next_line(txtfile, TRUE)) {
if (sscanf(inbuf, FORMAT_STRING, c, &r, &g, &b) != 4)
break;
color_index[(int) c[0]] = num_colors;
ColorMap[CM_RED][num_colors] = r;
ColorMap[CM_GREEN][num_colors] = g;
@@ -140,22 +175,29 @@ write_text_colormap(FILE *txtfile)
return TRUE;
}
/* read one tile from win/share/{monsters,objects,other}.txt */
static boolean
read_txttile(FILE *txtfile, pixel (*pixels)[TILE_X])
{
static int gidx = 0;
int ph, i, j, k, reslt;
char buf[BUFSZ], ttype[BUFSZ], gend[BUFSZ];
const char *p;
char c[2], *q;
static int gidx = 0;
char *q;
boolean res = FALSE;
gend[0] = '\0';
if (tile_set == MONSTER_SET)
reslt = fscanf(txtfile, "# %s %d (%[^,],%[^)])", ttype, &i, buf, gend);
else
reslt = fscanf(txtfile, "# %s %d (%[^)])", ttype, &i, buf);
reslt = 0;
if (get_next_line(txtfile, FALSE)) {
if (tile_set == MONSTER_SET)
reslt = sscanf(inbuf, "# %255s %d (%255[^,],%255[^)])",
ttype, &i, buf, gend);
else
reslt = sscanf(inbuf, "# %255s %d (%255[^)])",
ttype, &i, buf);
}
if (reslt <= 0)
return FALSE;
goto done;
if (tile_set == MONSTER_SET && gend[0] == 'f')
gidx = 1;
@@ -176,6 +218,7 @@ read_txttile(FILE *txtfile, pixel (*pixels)[TILE_X])
boolean other_mismatch =
(tile_set == OTHER_SET
&& !acceptable_tilename(tile_set, tile_set_indx, buf, p));
if (tile_set != OTHER_SET || other_mismatch) {
Fprintf(stderr, "warning: for tile %d (numbered %d) of %s,\n",
tile_set_indx, i, text_sets[tile_set]);
@@ -185,31 +228,39 @@ read_txttile(FILE *txtfile, pixel (*pixels)[TILE_X])
tile_set_indx++;
/* look for non-whitespace at each stage */
if (fscanf(txtfile, "%1s", c) < 0) {
if (!get_next_line(txtfile, TRUE)) {
Fprintf(stderr, "unexpected EOF\n");
return FALSE;
goto done;
}
if (c[0] != '{') {
if (inbuf[0] != '{') {
Fprintf(stderr, "didn't find expected '{'\n");
return FALSE;
goto done;
}
for (j = 0; j < TILE_Y; j++) {
/* read next line of color indices */
if (!get_next_line(txtfile, TRUE)) {
Fprintf(stderr, "unexpected EOF\n");
goto done;
}
if ((q = strchr(inbuf, '\n')) == 0)
q = &inbuf[strlen(inbuf)]; /* eos(inbuf) */
while (q < &inbuf[TILE_X])
*q++ = '.';
*q = '\0';
for (i = 0; i < TILE_X; i++) {
if (fscanf(txtfile, "%1s", c) < 0) {
Fprintf(stderr, "unexpected EOF\n");
return FALSE;
}
k = color_index[(int) c[0]];
if (grayscale) {
k = color_index[(unsigned char) inbuf[i]];
if (grayscale && k >= 0) {
if (k > (SIZE(graymappings) - 1))
Fprintf(stderr, "Gray mapping issue %d > %d.\n", k,
SIZE(graymappings) - 1);
else
k = graymappings[k];
}
if (k == -1)
Fprintf(stderr, "color %c not in colormap!\n", c[0]);
else {
if (k == -1) {
Fprintf(stderr, "color %c not in colormap!\n", inbuf[i]);
} else {
pixels[j][i].r = ColorMap[CM_RED][k];
pixels[j][i].g = ColorMap[CM_GREEN][k];
pixels[j][i].b = ColorMap[CM_BLUE][k];
@@ -218,25 +269,20 @@ read_txttile(FILE *txtfile, pixel (*pixels)[TILE_X])
}
if (ph) {
/* remember it for later */
memcpy(placeholder, pixels, sizeof(placeholder));
memcpy(placeholder, pixels, sizeof placeholder);
}
if (fscanf(txtfile, "%1s ", c) < 0) {
if (!get_next_line(txtfile, TRUE)) {
Fprintf(stderr, "unexpected EOF\n");
return FALSE;
goto done;
}
if (c[0] != '}') {
if (inbuf[0] != '}') {
Fprintf(stderr, "didn't find expected '}'\n");
return FALSE;
goto done;
}
#ifdef _DCC
/* DICE again... it doesn't seem to eat whitespace after the } like
* it should, so we have to do so manually.
*/
while ((*c = fgetc(txtfile)) != EOF && isspace((uchar) *c))
;
ungetc(*c, txtfile);
#endif
return TRUE;
res = TRUE;
done:
inbuf[0] = '\0';
return res;
}
static void
@@ -386,7 +432,7 @@ fopen_text_file(const char *filename, const char *type)
boolean
read_text_tile(pixel (*pixels)[TILE_X])
{
return (read_txttile(tile_file, pixels));
return read_txttile(tile_file, pixels);
}
boolean