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>
20 #include <sys/types.h>
22 #include <sys/ioctl.h>
25 static const char loadacm_usage[] = "loadacm\n\n"
26 "Loads an acm from standard input.\n";
28 typedef unsigned short unicode;
30 static long int ctoi(unsigned char *s, int *is_unicode);
31 int old_screen_map_read_ascii(FILE * fp, unsigned char buf[]);
32 int uni_screen_map_read_ascii(FILE * fp, unicode buf[], int *is_unicode);
33 unicode utf8_to_ucs2(char *buf);
34 int screen_map_load(int fd, FILE * fp);
36 int loadacm_main(int argc, char **argv)
40 if (argc>=2 && *argv[1]=='-') {
44 fd = open("/dev/tty", O_RDWR);
46 fprintf(stderr, "Error opening /dev/tty1: %s\n", strerror(errno));
50 if (screen_map_load(fd, stdin)) {
51 fprintf(stderr, "Error loading acm: %s\n", strerror(errno));
55 write(fd, "\033(K", 3);
60 int screen_map_load(int fd, FILE * fp)
63 unicode wbuf[E_TABSZ];
64 unsigned char buf[E_TABSZ];
68 if (fstat(fp->_fileno, &stbuf))
69 perror("Cannot stat map file"), exit(1);
71 /* first try a UTF screen-map: either ASCII (no restriction) or binary (regular file) */
74 (-1 == uni_screen_map_read_ascii(fp, wbuf, &is_unicode)))
75 || (S_ISREG(stbuf.st_mode) && (stbuf.st_size == (sizeof(unicode) * E_TABSZ)))) { /* test for binary UTF map by size */
77 if (-1 == fseek(fp, 0, SEEK_SET)) {
80 "16bit screen-map MUST be a regular file.\n"),
83 perror("fseek failed reading binary 16bit screen-map"),
87 if (fread(wbuf, sizeof(unicode) * E_TABSZ, 1, fp) != 1)
88 perror("Cannot read [new] map from file"), exit(1);
91 fprintf(stderr, "Input screen-map is binary.\n");
95 /* if it was effectively a 16-bit ASCII, OK, else try to read as 8-bit map */
96 /* same if it was binary, ie. if parse_failed */
97 if (parse_failed || is_unicode) {
98 if (ioctl(fd, PIO_UNISCRNMAP, wbuf))
99 perror("PIO_UNISCRNMAP ioctl"), exit(1);
106 if (-1 == fseek(fp, 0, SEEK_SET)) {
109 "Assuming 8bit screen-map - MUST be a regular file.\n"),
112 perror("fseek failed assuming 8bit screen-map"), exit(1);
115 /* ... and try an old 8-bit screen-map */
116 if (!(parse_failed = (-1 == old_screen_map_read_ascii(fp, buf))) ||
117 (S_ISREG(stbuf.st_mode) && (stbuf.st_size == E_TABSZ))) { /* test for binary old 8-bit map by size */
119 if (-1 == fseek(fp, 0, SEEK_SET)) {
121 /* should not - it succedeed above */
122 fprintf(stderr, "fseek() returned ESPIPE !\n"),
125 perror("fseek for binary 8bit screen-map"), exit(1);
128 if (fread(buf, E_TABSZ, 1, fp) != 1)
129 perror("Cannot read [old] map from file"), exit(1);
132 fprintf(stderr, "Input screen-map is binary.\n");
136 if (ioctl(fd, PIO_SCRNMAP, buf))
137 perror("PIO_SCRNMAP ioctl"), exit(1);
141 fprintf(stderr, "Error parsing symbolic map\n");
148 * - reads `fp' as a 16-bit ASCII SFM file.
149 * - returns -1 on error.
150 * - returns it in `unicode' in an E_TABSZ-elements array.
151 * - sets `*is_unicode' flagiff there were any non-8-bit
152 * (ie. real 16-bit) mapping.
154 * FIXME: ignores everything after second word
156 int uni_screen_map_read_ascii(FILE * fp, unicode buf[], int *is_unicode)
158 char buffer[256]; /* line buffer reading file */
159 char *p, *q; /* 1st + 2nd words in line */
160 int in, on; /* the same, as numbers */
161 int tmp_is_unicode; /* tmp for is_unicode calculation */
162 int i; /* loop index - result holder */
163 int ret_code = 0; /* return code */
164 sigset_t sigset, old_sigset;
170 /* first 128 codes defaults to ASCII */
171 for (i = 0; i < 128; i++)
173 /* remaining defaults to replacement char (usually E_TABSZ = 256) */
174 for (; i < E_TABSZ; i++)
178 sigemptyset(&sigset);
179 sigaddset(&sigset, SIGCHLD);
180 sigprocmask(SIG_BLOCK, &sigset, &old_sigset);
183 if (NULL == fgets(buffer, sizeof(buffer), fp)) {
187 perror("uni_screen_map_read_ascii() can't read line");
192 /* get "charset-relative charcode", stripping leading spaces */
193 p = strtok(buffer, " \t\n");
195 /* skip empty lines and comments */
199 /* get unicode mapping */
200 q = strtok(NULL, " \t\n");
203 if (in < 0 || in > 255) {
208 on = ctoi(q, &tmp_is_unicode);
209 if (in < 0 && on > 65535) {
214 *is_unicode |= tmp_is_unicode;
221 while (1); /* terminated by break on feof() */
223 /* restore sig mask */
224 sigprocmask(SIG_SETMASK, &old_sigset, NULL);
230 int old_screen_map_read_ascii(FILE * fp, unsigned char buf[])
236 for (in = 0; in < 256; in++)
239 while (fgets(buffer, sizeof(buffer) - 1, fp)) {
240 p = strtok(buffer, " \t\n");
245 q = strtok(NULL, " \t\n#");
248 if (in < 0 || in > 255)
252 if (in < 0 && on > 255)
265 * - converts a string into an int.
266 * - supports dec and hex bytes, hex UCS2, single-quoted byte and UTF8 chars.
267 * - returns the converted value
268 * - if `is_unicode != NULL', use it to tell whether it was unicode
270 * CAVEAT: will report valid UTF mappings using only 1 byte as 8-bit ones.
272 long int ctoi(unsigned char *s, int *is_unicode)
281 /* hex-specified UCS2 */
282 if ((strncmp(s, "U+", 2) == 0) &&
283 (strspn(s + 2, "0123456789abcdefABCDEF") == ls - 2)) {
284 sscanf(s + 2, "%x", &i);
289 /* hex-specified byte */
290 else if ((ls <= 4) && (strncmp(s, "0x", 2) == 0) &&
291 (strspn(s + 2, "0123456789abcdefABCDEF") == ls - 2))
292 sscanf(s + 2, "%x", &i);
294 /* oct-specified number (byte) */
295 else if ((*s == '0') && (strspn(s, "01234567") == ls))
298 /* dec-specified number (byte) */
299 else if (strspn(s, "0123456789") == ls)
302 /* single-byte quoted char */
303 else if ((strlen(s) == 3) && (s[0] == '\'') && (s[2] == '\''))
306 /* multi-byte UTF8 quoted char */
307 else if ((s[0] == '\'') && (s[ls - 1] == '\'')) {
308 s[ls - 1] = 0; /* ensure we'll not "parse UTF too far" */
309 i = utf8_to_ucs2(s + 1);
319 void saveoldmap(int fd, char *omfil)
324 #ifdef GIO_UNISCRNMAP
325 unicode xbuf[E_TABSZ];
328 if (ioctl(fd, GIO_UNISCRNMAP, xbuf)) {
329 perror("GIO_UNISCRNMAP ioctl error");
331 if (ioctl(fd, GIO_SCRNMAP, buf)) {
332 perror("GIO_SCRNMAP ioctl error");
336 #ifdef GIO_UNISCRNMAP
340 if ((fp = fopen(omfil, "w")) == NULL) {
344 #ifdef GIO_UNISCRNMAP
347 if (fwrite(buf, E_TABSZ, 1, fp) != 1) {
348 perror("Error writing map to file");
351 #ifdef GIO_UNISCRNMAP
352 } else if (fwrite(xbuf, sizeof(unicode) * E_TABSZ, 1, fp) != 1) {
353 perror("Error writing map to file");
361 unicode utf8_to_ucs2(char *buf)
372 /* if byte should be part of multi-byte sequence */
374 /* if we have already started to parse a UTF8 sequence */
375 if (utf_count > 0 && (c & 0xc0) == 0x80) {
376 utf_char = (utf_char << 6) | (c & 0x3f);
382 } else { /* Possibly 1st char of a UTF8 sequence */
384 if ((c & 0xe0) == 0xc0) {
386 utf_char = (c & 0x1f);
387 } else if ((c & 0xf0) == 0xe0) {
389 utf_char = (c & 0x0f);
390 } else if ((c & 0xf8) == 0xf0) {
392 utf_char = (c & 0x07);
393 } else if ((c & 0xfc) == 0xf8) {
395 utf_char = (c & 0x03);
396 } else if ((c & 0xfe) == 0xfc) {
398 utf_char = (c & 0x01);
403 } else { /* not part of multi-byte sequence - treat as ASCII
404 * this makes incomplete sequences to be ignored