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 typedef unsigned short unicode;
27 static long int ctoi(unsigned char *s, int *is_unicode);
28 int old_screen_map_read_ascii(FILE * fp, unsigned char buf[]);
29 int uni_screen_map_read_ascii(FILE * fp, unicode buf[], int *is_unicode);
30 unicode utf8_to_ucs2(char *buf);
31 int screen_map_load(int fd, FILE * fp);
33 int loadacm_main(int argc, char **argv)
37 if (argc>=2 && *argv[1]=='-') {
41 fd = open("/dev/tty", O_RDWR);
43 errorMsg("Error opening /dev/tty1: %s\n", strerror(errno));
47 if (screen_map_load(fd, stdin)) {
48 errorMsg("Error loading acm: %s\n", strerror(errno));
52 write(fd, "\033(K", 3);
57 int screen_map_load(int fd, FILE * fp)
60 unicode wbuf[E_TABSZ];
61 unsigned char buf[E_TABSZ];
65 if (fstat(fileno(fp), &stbuf))
66 perror("Cannot stat map file"), exit(1);
68 /* first try a UTF screen-map: either ASCII (no restriction) or binary (regular file) */
71 (-1 == uni_screen_map_read_ascii(fp, wbuf, &is_unicode)))
72 || (S_ISREG(stbuf.st_mode) && (stbuf.st_size == (sizeof(unicode) * E_TABSZ)))) { /* test for binary UTF map by size */
74 if (-1 == fseek(fp, 0, SEEK_SET)) {
76 errorMsg("16bit screen-map MUST be a regular file.\n"),
79 perror("fseek failed reading binary 16bit screen-map"),
83 if (fread(wbuf, sizeof(unicode) * E_TABSZ, 1, fp) != 1)
84 perror("Cannot read [new] map from file"), exit(1);
87 errorMsg("Input screen-map is binary.\n");
91 /* if it was effectively a 16-bit ASCII, OK, else try to read as 8-bit map */
92 /* same if it was binary, ie. if parse_failed */
93 if (parse_failed || is_unicode) {
94 if (ioctl(fd, PIO_UNISCRNMAP, wbuf))
95 perror("PIO_UNISCRNMAP ioctl"), exit(1);
102 if (-1 == fseek(fp, 0, SEEK_SET)) {
104 errorMsg("Assuming 8bit screen-map - MUST be a regular file.\n"),
107 perror("fseek failed assuming 8bit screen-map"), exit(1);
110 /* ... and try an old 8-bit screen-map */
111 if (!(parse_failed = (-1 == old_screen_map_read_ascii(fp, buf))) ||
112 (S_ISREG(stbuf.st_mode) && (stbuf.st_size == E_TABSZ))) { /* test for binary old 8-bit map by size */
114 if (-1 == fseek(fp, 0, SEEK_SET)) {
116 /* should not - it succedeed above */
117 errorMsg("fseek() returned ESPIPE !\n"),
120 perror("fseek for binary 8bit screen-map"), exit(1);
123 if (fread(buf, E_TABSZ, 1, fp) != 1)
124 perror("Cannot read [old] map from file"), exit(1);
127 errorMsg("Input screen-map is binary.\n");
131 if (ioctl(fd, PIO_SCRNMAP, buf))
132 perror("PIO_SCRNMAP ioctl"), exit(1);
136 errorMsg("Error parsing symbolic map\n");
142 * - reads `fp' as a 16-bit ASCII SFM file.
143 * - returns -1 on error.
144 * - returns it in `unicode' in an E_TABSZ-elements array.
145 * - sets `*is_unicode' flagiff there were any non-8-bit
146 * (ie. real 16-bit) mapping.
148 * FIXME: ignores everything after second word
150 int uni_screen_map_read_ascii(FILE * fp, unicode buf[], int *is_unicode)
152 char buffer[256]; /* line buffer reading file */
153 char *p, *q; /* 1st + 2nd words in line */
154 int in, on; /* the same, as numbers */
155 int tmp_is_unicode; /* tmp for is_unicode calculation */
156 int i; /* loop index - result holder */
157 int ret_code = 0; /* return code */
158 sigset_t sigset, old_sigset;
164 /* first 128 codes defaults to ASCII */
165 for (i = 0; i < 128; i++)
167 /* remaining defaults to replacement char (usually E_TABSZ = 256) */
168 for (; i < E_TABSZ; i++)
172 sigemptyset(&sigset);
173 sigaddset(&sigset, SIGCHLD);
174 sigprocmask(SIG_BLOCK, &sigset, &old_sigset);
177 if (NULL == fgets(buffer, sizeof(buffer), fp)) {
181 perror("uni_screen_map_read_ascii() can't read line");
186 /* get "charset-relative charcode", stripping leading spaces */
187 p = strtok(buffer, " \t\n");
189 /* skip empty lines and comments */
193 /* get unicode mapping */
194 q = strtok(NULL, " \t\n");
197 if (in < 0 || in > 255) {
202 on = ctoi(q, &tmp_is_unicode);
203 if (in < 0 && on > 65535) {
208 *is_unicode |= tmp_is_unicode;
215 while (1); /* terminated by break on feof() */
217 /* restore sig mask */
218 sigprocmask(SIG_SETMASK, &old_sigset, NULL);
224 int old_screen_map_read_ascii(FILE * fp, unsigned char buf[])
230 for (in = 0; in < 256; in++)
233 while (fgets(buffer, sizeof(buffer) - 1, fp)) {
234 p = strtok(buffer, " \t\n");
239 q = strtok(NULL, " \t\n#");
242 if (in < 0 || in > 255)
246 if (in < 0 && on > 255)
259 * - converts a string into an int.
260 * - supports dec and hex bytes, hex UCS2, single-quoted byte and UTF8 chars.
261 * - returns the converted value
262 * - if `is_unicode != NULL', use it to tell whether it was unicode
264 * CAVEAT: will report valid UTF mappings using only 1 byte as 8-bit ones.
266 long int ctoi(unsigned char *s, int *is_unicode)
275 /* hex-specified UCS2 */
276 if ((strncmp(s, "U+", 2) == 0) &&
277 (strspn(s + 2, "0123456789abcdefABCDEF") == ls - 2)) {
278 sscanf(s + 2, "%x", &i);
283 /* hex-specified byte */
284 else if ((ls <= 4) && (strncmp(s, "0x", 2) == 0) &&
285 (strspn(s + 2, "0123456789abcdefABCDEF") == ls - 2))
286 sscanf(s + 2, "%x", &i);
288 /* oct-specified number (byte) */
289 else if ((*s == '0') && (strspn(s, "01234567") == ls))
292 /* dec-specified number (byte) */
293 else if (strspn(s, "0123456789") == ls)
296 /* single-byte quoted char */
297 else if ((strlen(s) == 3) && (s[0] == '\'') && (s[2] == '\''))
300 /* multi-byte UTF8 quoted char */
301 else if ((s[0] == '\'') && (s[ls - 1] == '\'')) {
302 s[ls - 1] = 0; /* ensure we'll not "parse UTF too far" */
303 i = utf8_to_ucs2(s + 1);
313 void saveoldmap(int fd, char *omfil)
318 #ifdef GIO_UNISCRNMAP
319 unicode xbuf[E_TABSZ];
322 if (ioctl(fd, GIO_UNISCRNMAP, xbuf)) {
323 perror("GIO_UNISCRNMAP ioctl error");
325 if (ioctl(fd, GIO_SCRNMAP, buf)) {
326 perror("GIO_SCRNMAP ioctl error");
330 #ifdef GIO_UNISCRNMAP
334 if ((fp = fopen(omfil, "w")) == NULL) {
338 #ifdef GIO_UNISCRNMAP
341 if (fwrite(buf, E_TABSZ, 1, fp) != 1) {
342 perror("Error writing map to file");
345 #ifdef GIO_UNISCRNMAP
346 } else if (fwrite(xbuf, sizeof(unicode) * E_TABSZ, 1, fp) != 1) {
347 perror("Error writing map to file");
355 unicode utf8_to_ucs2(char *buf)
366 /* if byte should be part of multi-byte sequence */
368 /* if we have already started to parse a UTF8 sequence */
369 if (utf_count > 0 && (c & 0xc0) == 0x80) {
370 utf_char = (utf_char << 6) | (c & 0x3f);
376 } else { /* Possibly 1st char of a UTF8 sequence */
378 if ((c & 0xe0) == 0xc0) {
380 utf_char = (c & 0x1f);
381 } else if ((c & 0xf0) == 0xe0) {
383 utf_char = (c & 0x0f);
384 } else if ((c & 0xf8) == 0xf0) {
386 utf_char = (c & 0x07);
387 } else if ((c & 0xfc) == 0xf8) {
389 utf_char = (c & 0x03);
390 } else if ((c & 0xfe) == 0xfc) {
392 utf_char = (c & 0x01);
397 } else { /* not part of multi-byte sequence - treat as ASCII
398 * this makes incomplete sequences to be ignored