1 /* vi: set sw=4 ts=4: */
4 * mapscrn.c - version 0.92
6 * Was taken from console-tools and adapted by
7 * Peter Novodvorsky <petya@logic.ru>
19 #include <sys/types.h>
21 #include <sys/ioctl.h>
24 typedef unsigned short unicode;
26 static long int ctoi(unsigned char *s, int *is_unicode);
27 int old_screen_map_read_ascii(FILE * fp, unsigned char buf[]);
28 int uni_screen_map_read_ascii(FILE * fp, unicode buf[], int *is_unicode);
29 unicode utf8_to_ucs2(char *buf);
30 int screen_map_load(int fd, FILE * fp);
32 int loadacm_main(int argc, char **argv)
36 fd = open("/dev/tty", O_RDWR);
38 fprintf(stderr, "Error opening /dev/tty1: %s\n", strerror(errno));
42 if (screen_map_load(fd, stdin)) {
43 fprintf(stderr, "Error loading acm: %s\n", strerror(errno));
47 write(fd, "\033(K", 3);
52 int screen_map_load(int fd, FILE * fp)
55 unicode wbuf[E_TABSZ];
56 unsigned char buf[E_TABSZ];
60 if (fstat(fp->_fileno, &stbuf))
61 perror("Cannot stat map file"), exit(1);
63 /* first try a UTF screen-map: either ASCII (no restriction) or binary (regular file) */
66 (-1 == uni_screen_map_read_ascii(fp, wbuf, &is_unicode)))
67 || (S_ISREG(stbuf.st_mode) && (stbuf.st_size == (sizeof(unicode) * E_TABSZ)))) { /* test for binary UTF map by size */
69 if (-1 == fseek(fp, 0, SEEK_SET)) {
72 "16bit screen-map MUST be a regular file.\n"),
75 perror("fseek failed reading binary 16bit screen-map"),
79 if (fread(wbuf, sizeof(unicode) * E_TABSZ, 1, fp) != 1)
80 perror("Cannot read [new] map from file"), exit(1);
83 fprintf(stderr, "Input screen-map is binary.\n");
87 /* if it was effectively a 16-bit ASCII, OK, else try to read as 8-bit map */
88 /* same if it was binary, ie. if parse_failed */
89 if (parse_failed || is_unicode) {
90 if (ioctl(fd, PIO_UNISCRNMAP, wbuf))
91 perror("PIO_UNISCRNMAP ioctl"), exit(1);
98 if (-1 == fseek(fp, 0, SEEK_SET)) {
101 "Assuming 8bit screen-map - MUST be a regular file.\n"),
104 perror("fseek failed assuming 8bit screen-map"), exit(1);
107 /* ... and try an old 8-bit screen-map */
108 if (!(parse_failed = (-1 == old_screen_map_read_ascii(fp, buf))) ||
109 (S_ISREG(stbuf.st_mode) && (stbuf.st_size == E_TABSZ))) { /* test for binary old 8-bit map by size */
111 if (-1 == fseek(fp, 0, SEEK_SET)) {
113 /* should not - it succedeed above */
114 fprintf(stderr, "fseek() returned ESPIPE !\n"),
117 perror("fseek for binary 8bit screen-map"), exit(1);
120 if (fread(buf, E_TABSZ, 1, fp) != 1)
121 perror("Cannot read [old] map from file"), exit(1);
124 fprintf(stderr, "Input screen-map is binary.\n");
128 if (ioctl(fd, PIO_SCRNMAP, buf))
129 perror("PIO_SCRNMAP ioctl"), exit(1);
133 fprintf(stderr, "Error parsing symbolic map\n");
140 * - reads `fp' as a 16-bit ASCII SFM file.
141 * - returns -1 on error.
142 * - returns it in `unicode' in an E_TABSZ-elements array.
143 * - sets `*is_unicode' flagiff there were any non-8-bit
144 * (ie. real 16-bit) mapping.
146 * FIXME: ignores everything after second word
148 int uni_screen_map_read_ascii(FILE * fp, unicode buf[], int *is_unicode)
150 char buffer[256]; /* line buffer reading file */
151 char *p, *q; /* 1st + 2nd words in line */
152 int in, on; /* the same, as numbers */
153 int tmp_is_unicode; /* tmp for is_unicode calculation */
154 int i; /* loop index - result holder */
155 int ret_code = 0; /* return code */
156 sigset_t sigset, old_sigset;
162 /* first 128 codes defaults to ASCII */
163 for (i = 0; i < 128; i++)
165 /* remaining defaults to replacement char (usually E_TABSZ = 256) */
166 for (; i < E_TABSZ; i++)
170 sigemptyset(&sigset);
171 sigaddset(&sigset, SIGCHLD);
172 sigprocmask(SIG_BLOCK, &sigset, &old_sigset);
175 if (NULL == fgets(buffer, sizeof(buffer), fp)) {
179 perror("uni_screen_map_read_ascii() can't read line");
184 /* get "charset-relative charcode", stripping leading spaces */
185 p = strtok(buffer, " \t\n");
187 /* skip empty lines and comments */
191 /* get unicode mapping */
192 q = strtok(NULL, " \t\n");
195 if (in < 0 || in > 255) {
200 on = ctoi(q, &tmp_is_unicode);
201 if (in < 0 && on > 65535) {
206 *is_unicode |= tmp_is_unicode;
213 while (1); /* terminated by break on feof() */
215 /* restore sig mask */
216 sigprocmask(SIG_SETMASK, &old_sigset, NULL);
222 int old_screen_map_read_ascii(FILE * fp, unsigned char buf[])
228 for (in = 0; in < 256; in++)
231 while (fgets(buffer, sizeof(buffer) - 1, fp)) {
232 p = strtok(buffer, " \t\n");
237 q = strtok(NULL, " \t\n#");
240 if (in < 0 || in > 255)
244 if (in < 0 && on > 255)
257 * - converts a string into an int.
258 * - supports dec and hex bytes, hex UCS2, single-quoted byte and UTF8 chars.
259 * - returns the converted value
260 * - if `is_unicode != NULL', use it to tell whether it was unicode
262 * CAVEAT: will report valid UTF mappings using only 1 byte as 8-bit ones.
264 long int ctoi(unsigned char *s, int *is_unicode)
273 /* hex-specified UCS2 */
274 if ((strncmp(s, "U+", 2) == 0) &&
275 (strspn(s + 2, "0123456789abcdefABCDEF") == ls - 2)) {
276 sscanf(s + 2, "%x", &i);
281 /* hex-specified byte */
282 else if ((ls <= 4) && (strncmp(s, "0x", 2) == 0) &&
283 (strspn(s + 2, "0123456789abcdefABCDEF") == ls - 2))
284 sscanf(s + 2, "%x", &i);
286 /* oct-specified number (byte) */
287 else if ((*s == '0') && (strspn(s, "01234567") == ls))
290 /* dec-specified number (byte) */
291 else if (strspn(s, "0123456789") == ls)
294 /* single-byte quoted char */
295 else if ((strlen(s) == 3) && (s[0] == '\'') && (s[2] == '\''))
298 /* multi-byte UTF8 quoted char */
299 else if ((s[0] == '\'') && (s[ls - 1] == '\'')) {
300 s[ls - 1] = 0; /* ensure we'll not "parse UTF too far" */
301 i = utf8_to_ucs2(s + 1);
311 void saveoldmap(int fd, char *omfil)
316 #ifdef GIO_UNISCRNMAP
317 unicode xbuf[E_TABSZ];
320 if (ioctl(fd, GIO_UNISCRNMAP, xbuf)) {
321 perror("GIO_UNISCRNMAP ioctl error");
323 if (ioctl(fd, GIO_SCRNMAP, buf)) {
324 perror("GIO_SCRNMAP ioctl error");
328 #ifdef GIO_UNISCRNMAP
332 if ((fp = fopen(omfil, "w")) == NULL) {
336 #ifdef GIO_UNISCRNMAP
339 if (fwrite(buf, E_TABSZ, 1, fp) != 1) {
340 perror("Error writing map to file");
343 #ifdef GIO_UNISCRNMAP
344 } else if (fwrite(xbuf, sizeof(unicode) * E_TABSZ, 1, fp) != 1) {
345 perror("Error writing map to file");
353 unicode utf8_to_ucs2(char *buf)
364 /* if byte should be part of multi-byte sequence */
366 /* if we have already started to parse a UTF8 sequence */
367 if (utf_count > 0 && (c & 0xc0) == 0x80) {
368 utf_char = (utf_char << 6) | (c & 0x3f);
374 } else { /* Possibly 1st char of a UTF8 sequence */
376 if ((c & 0xe0) == 0xc0) {
378 utf_char = (c & 0x1f);
379 } else if ((c & 0xf0) == 0xe0) {
381 utf_char = (c & 0x0f);
382 } else if ((c & 0xf8) == 0xf0) {
384 utf_char = (c & 0x07);
385 } else if ((c & 0xfc) == 0xf8) {
387 utf_char = (c & 0x03);
388 } else if ((c & 0xfe) == 0xfc) {
390 utf_char = (c & 0x01);
395 } else { /* not part of multi-byte sequence - treat as ASCII
396 * this makes incomplete sequences to be ignored