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ncurses/test/demo_termcap.c

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/****************************************************************************
* Copyright 2019,2020 Thomas E. Dickey *
* Copyright 2005-2016,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/*
* Author: Thomas E. Dickey
*
* $Id: demo_termcap.c,v 1.59 2020/02/02 23:34:34 tom Exp $
*
* A simple demo of the termcap interface.
*/
#define USE_TINFO
#include <test.priv.h>
#include <sys/stat.h>
#if NCURSES_XNAMES
#if HAVE_TERM_ENTRY_H
#include <term_entry.h>
#else
#undef NCURSES_XNAMES
#define NCURSES_XNAMES 0
#endif
#endif
#if defined(NCURSES_VERSION)
#if HAVE_NCURSES_TERMCAP_H
#include <ncurses/termcap.h>
#elif HAVE_TERMCAP_H
#include <termcap.h>
#endif
#endif
static void failed(const char *) GCC_NORETURN;
static void
failed(const char *msg)
{
fprintf(stderr, "%s\n", msg);
ExitProgram(EXIT_FAILURE);
}
#if HAVE_TGETENT
#if defined(HAVE_CURSES_DATA_BOOLNAMES) || defined(DECL_CURSES_DATA_BOOLNAMES)
#define USE_CODE_LISTS 1
#else
#define USE_CODE_LISTS 0
#endif
#define FCOLS 8
#define FNAME(type) "%s %-*s = ", #type, FCOLS
static bool b_opt = FALSE;
static bool n_opt = FALSE;
static bool s_opt = FALSE;
static bool q_opt = FALSE;
#ifdef NCURSES_VERSION
static bool x_opt = FALSE;
static bool y_opt = FALSE;
#endif
static char *d_opt;
static char *e_opt;
static char **db_list;
static int db_item;
static char *my_blob;
static char **my_boolcodes;
static char **my_numcodes;
static char **my_numvalues;
static char **my_strcodes;
static char **my_strvalues;
static long total_values;
static long total_b_values;
static long total_n_values;
static long total_s_values;
#define isCapName(c) (isgraph(c) && strchr("^=:\\", c) == 0)
#define EachCapName(n) n = 33; n < 127; ++n
static char *
make_dbitem(char *p, char *q)
{
size_t need = strlen(e_opt) + 2 + (size_t) (p - q);
char *result = malloc(need);
_nc_SPRINTF(result, _nc_SLIMIT(need) "%s=%.*s", e_opt, (int) (p - q), q);
return result;
}
static void
make_dblist(void)
{
if (d_opt && e_opt) {
int pass;
for (pass = 0; pass < 2; ++pass) {
char *p, *q;
size_t count = 0;
for (p = q = d_opt; *p != '\0'; ++p) {
if (*p == ':') {
if (p != q + 1) {
if (pass) {
db_list[count] = make_dbitem(p, q);
}
count++;
}
q = p + 1;
}
}
if (p != q + 1) {
if (pass) {
db_list[count] = make_dbitem(p, q);
}
count++;
}
if (!pass) {
db_list = typeCalloc(char *, count + 1);
}
}
}
}
static char *
next_dbitem(void)
{
char *result = 0;
if (db_list) {
if ((result = db_list[db_item]) == 0) {
db_item = 0;
result = db_list[0];
} else {
db_item++;
}
}
if (result != 0)
printf("** %s\n", result);
return result;
}
#if NO_LEAKS
static void
free_dblist(void)
{
if (db_list) {
int n;
for (n = 0; db_list[n]; ++n)
free(db_list[n]);
free(db_list);
db_list = 0;
}
}
#endif /* NO_LEAKS */
static void
show_string(const char *name, const char *value)
{
printf(FNAME(str), name);
if (value == ((char *) -1)) {
printf("CANCELLED");
} else if (value == ((char *) 0)) {
printf("ABSENT");
} else {
while (*value != 0) {
int ch = UChar(*value++);
switch (ch) {
case '\177':
fputs("^?", stdout);
break;
case '\033':
fputs("\\E", stdout);
break;
case '\b':
fputs("\\b", stdout);
break;
case '\f':
fputs("\\f", stdout);
break;
case '\n':
fputs("\\n", stdout);
break;
case '\r':
fputs("\\r", stdout);
break;
case ' ':
fputs("\\s", stdout);
break;
case '\t':
fputs("\\t", stdout);
break;
case '^':
fputs("\\^", stdout);
break;
case ':':
fputs("\\072", stdout);
break;
case '\\':
fputs("\\\\", stdout);
break;
default:
if (isgraph(ch))
fputc(ch, stdout);
else if (ch < 32)
printf("^%c", ch + '@');
else
printf("\\%03o", ch);
break;
}
}
}
printf("\n");
}
static void
show_number(const char *name, int value)
{
printf(FNAME(num), name);
printf(" %d\n", value);
}
static void
dumpit(NCURSES_CONST char *cap)
{
/*
* One of the limitations of the termcap interface is that the library
* cannot determine the size of the buffer passed via tgetstr(), nor the
* amount of space remaining. This demo simply reuses the whole buffer
* for each call; a normal termcap application would try to use the buffer
* to hold all of the strings extracted from the terminal entry.
*/
char area[1024], *ap = area;
char *str;
int num;
if ((str = tgetstr(cap, &ap)) != 0) {
total_values++;
total_s_values++;
if (!q_opt) {
/*
* Note that the strings returned are mostly terminfo format, since
* ncurses does not convert except for a handful of special cases.
*/
show_string(cap, str);
}
} else if ((num = tgetnum(cap)) >= 0) {
total_values++;
total_n_values++;
if (!q_opt) {
show_number(cap, num);
}
} else if (tgetflag(cap) > 0) {
total_values++;
total_b_values++;
if (!q_opt) {
printf(FNAME(flg), cap);
printf("%s\n", "true");
}
}
if (!q_opt)
fflush(stdout);
}
static void
brute_force(const char *name)
{
char buffer[1024];
if (db_list) {
putenv(next_dbitem());
}
if (!q_opt)
printf("Terminal type \"%s\"\n", name);
if (tgetent(buffer, name) >= 0) {
char cap[3];
int c1, c2;
cap[2] = 0;
for (EachCapName(c1)) {
cap[0] = (char) c1;
if (isCapName(c1)) {
for (EachCapName(c2)) {
cap[1] = (char) c2;
if (isCapName(c2)) {
dumpit(cap);
}
}
}
}
}
}
#if NCURSES_XNAMES
static void
dump_xname(NCURSES_CONST char *cap)
{
if (strlen(cap) == 2)
dumpit(cap);
}
#endif
static void
demo_termcap(NCURSES_CONST char *name)
{
char buffer[1024];
if (db_list) {
putenv(next_dbitem());
}
if (!q_opt)
printf("Terminal type \"%s\"\n", name);
if (tgetent(buffer, name) >= 0) {
NCURSES_CONST char *cap;
unsigned n;
if (b_opt) {
for (n = 0;; ++n) {
cap = my_boolcodes[n];
if (cap == 0)
break;
dumpit(cap);
}
}
if (n_opt) {
for (n = 0;; ++n) {
cap = my_numcodes[n];
if (cap == 0)
break;
dumpit(cap);
}
}
if (s_opt) {
for (n = 0;; ++n) {
cap = my_strcodes[n];
if (cap == 0)
break;
dumpit(cap);
}
}
#ifdef NCURSES_VERSION
if (x_opt && (my_blob == 0) && y_opt) {
#if NCURSES_XNAMES
TERMTYPE *term = (TERMTYPE *) cur_term;
if (term != 0
&& ((NUM_BOOLEANS(term) != BOOLCOUNT)
|| (NUM_NUMBERS(term) != NUMCOUNT)
|| (NUM_STRINGS(term) != STRCOUNT))) {
for (n = BOOLCOUNT; n < NUM_BOOLEANS(term); ++n) {
dump_xname(ExtBoolname(term, (int) n, boolnames));
}
for (n = NUMCOUNT; n < NUM_NUMBERS(term); ++n) {
dump_xname(ExtNumname(term, (int) n, numnames));
}
for (n = STRCOUNT; n < NUM_STRINGS(term); ++n) {
dump_xname(ExtStrname(term, (int) n, strnames));
}
}
#endif
}
#endif
}
}
typedef enum {
pDefault = 0
,pComment
,pDescription
,pEscaped
,pNewline
,pName
,pNumber
,pString
} STATE;
static void
parse_description(const char *input_name)
{
static char empty[1];
FILE *fp;
struct stat sb;
size_t count_bools = 0;
size_t count_nums = 0;
size_t count_strs = 0;
size_t len;
size_t j, k;
STATE state;
if (stat(input_name, &sb) != 0
|| (sb.st_mode & S_IFMT) != S_IFREG) {
failed("input is not a file");
}
if (sb.st_size == 0) {
failed("input is empty");
}
/*
* None of the arrays could be larger than the input-file, and since it
* is small, just allocate the maximum for simplicity.
*/
if ((my_blob = malloc((size_t) sb.st_size + 1)) == 0 ||
(my_boolcodes = typeCalloc(char *, sb.st_size)) == 0 ||
(my_numcodes = typeCalloc(char *, sb.st_size)) == 0 ||
(my_numvalues = typeCalloc(char *, sb.st_size)) == 0 ||
(my_strcodes = typeCalloc(char *, sb.st_size)) == 0 ||
(my_strvalues = typeCalloc(char *, sb.st_size)) == 0) {
failed("cannot allocate memory for input-file");
}
if ((fp = fopen(input_name, "r")) == 0)
failed("cannot open input-file");
len = fread(my_blob, sizeof(char), (size_t) sb.st_size, fp);
my_blob[sb.st_size] = '\0';
fclose(fp);
/*
* First, get rid of comments and escaped newlines, as well as repeated
* colons to construct a canonical entry.
*
* FIXME: actually this should make an additional pass just to strip
* comment-lines and escaped newlines. But it is workable for infocmp
* output.
*/
state = pNewline;
for (j = k = 0; j < len; ++j) {
int ch = my_blob[j];
if (ch == '\t') {
ch = ' ';
}
switch (state) {
case pNewline:
if (ch == ' ') {
continue;
}
if (ch == '#') {
state = pComment;
continue;
}
state = pDefault;
/* FALLTHRU */
case pDefault:
switch (ch) {
case '|':
state = pDescription;
continue;
case '\\':
state = pEscaped;
continue;
case '\n':
state = pNewline;
continue;
case ' ':
case ':':
break;
default:
state = pName;
break;
}
my_blob[k++] = (char) ch;
break;
case pComment:
if (ch == '\n')
state = pNewline;
break;
case pDescription:
switch (ch) {
case ':':
state = pDefault;
break;
case '\n':
state = pNewline;
break;
}
break;
case pEscaped:
if (ch != '\n') {
my_blob[k++] = (char) ch;
state = pDefault;
} else {
state = pNewline;
}
break;
case pName:
switch (ch) {
case '\n':
state = pNewline;
continue;
case ' ':
case ':':
state = pDefault;
break;
case '#':
state = pNumber;
break;
case '|':
state = pDescription;
continue;
}
my_blob[k++] = (char) ch;
break;
case pNumber:
switch (ch) {
case '\n':
state = pNewline;
continue;
case ':':
state = pDefault;
break;
case ' ':
state = pDefault;
continue;
}
my_blob[k++] = (char) ch;
break;
case pString:
switch (ch) {
case '\\':
if (my_blob[j + 1] == '\0') {
state = pDefault;
continue;
}
break;
case '\n':
state = pNewline;
continue;
case ':':
state = pDefault;
break;
}
my_blob[k++] = (char) ch;
break;
default:
/* not used */
break;
}
}
my_blob[k] = '\0';
/*
* Then, parse what's left, making indexes of the names and values.
*/
state = pDefault;
for (j = 0; my_blob[j] != '\0'; ++j) {
switch (state) {
case pDefault:
switch (my_blob[j]) {
case '\\':
state = pEscaped;
break;
case ':':
my_blob[j] = '\0';
if (my_blob[j + 1] != '\0' && my_blob[j + 1] != ':')
state = pName;
break;
case ' ':
break;
default:
break;
}
case pEscaped:
break;
case pName:
state = pDefault;
/*
* Commented-out capabilities might be accessible (they are in
* ncurses).
*/
if (my_blob[j] == '.' && my_blob[j + 1] == '.') {
j += 2;
}
if (my_blob[j + 1] != '\0') {
switch (my_blob[j + 2]) {
case '#':
my_numvalues[count_nums] = &my_blob[j + 3];
my_numcodes[count_nums++] = &my_blob[j];
my_blob[j + 2] = '\0';
state = pNumber;
j += 2;
break;
case '=':
my_strvalues[count_strs] = &my_blob[j + 3];
my_strcodes[count_strs++] = &my_blob[j];
my_blob[j + 2] = '\0';
state = pString;
j += 2;
break;
default:
if (my_blob[j + 2] == '@') {
/*
* We cannot get the type for a cancelled item
* directly, but can infer it assuming the input
* came from infocmp, which puts the data in a
* known order.
*/
if (count_strs) {
my_strvalues[count_strs] = empty;
my_strcodes[count_strs++] = &my_blob[j];
} else if (count_nums) {
my_numvalues[count_nums] = empty;
my_numcodes[count_nums++] = &my_blob[j];
} else {
my_boolcodes[count_bools++] = &my_blob[j];
}
} else {
my_boolcodes[count_bools++] = &my_blob[j];
}
j++;
break;
}
}
break;
case pNumber:
if (!isdigit(UChar(my_blob[j]))) {
--j;
state = pDefault;
}
break;
case pString:
switch (my_blob[j]) {
case '\\':
if (my_blob[j + 1] == '\0') {
state = pDefault;
continue;
} else {
++j;
}
break;
case '\n':
state = pNewline;
continue;
case ':':
--j;
state = pDefault;
break;
}
break;
case pNewline:
case pComment:
case pDescription:
default:
break;
}
}
my_boolcodes[count_bools] = 0;
my_numcodes[count_nums] = 0;
my_numvalues[count_nums] = 0;
my_strcodes[count_strs] = 0;
my_strvalues[count_strs] = 0;
#if 0
printf("bools:%d\n", (int) count_bools);
for (j = 0; my_boolcodes[j]; ++j)
printf("%5d:%s\n", (int) j, my_boolcodes[j]);
printf("numbers:%d\n", (int) count_nums);
for (j = 0; my_numcodes[j]; ++j)
printf("%5d:%s(%s)\n", (int) j, my_numcodes[j], my_numvalues[j]);
printf("strings:%d\n", (int) count_strs);
for (j = 0; my_strcodes[j]; ++j)
printf("%5d:%s(%s)\n", (int) j, my_strcodes[j], my_strvalues[j]);
#endif
}
#if USE_CODE_LISTS
static char **
copy_code_list(NCURSES_CONST char *const *list)
{
int pass;
size_t count;
size_t length = 1;
char **result = 0;
char *unused = 0;
for (pass = 0; pass < 2; ++pass) {
for (count = 0; list[count] != 0; ++count) {
size_t chunk = strlen(list[count]) + 1;
if (pass == 0) {
length += chunk;
} else {
result[count] = unused;
_nc_STRCPY(unused, list[count], length);
unused += chunk;
}
}
if (pass == 0) {
char *blob = malloc(length);
result = typeCalloc(char *, count + 1);
unused = blob;
if (blob == 0 || result == 0)
failed("copy_code_list failed");
}
}
return result;
}
#if NO_LEAKS
static void
free_code_list(char **list)
{
if (list) {
free(list[0]);
free(list);
}
}
#endif /* NO_LEAKS */
#endif /* USE_CODE_LISTS */
static void
usage(void)
{
static const char *msg[] =
{
"Usage: demo_termcap [options] [terminal]",
"",
"If no options are given, print all (boolean, numeric, string)",
"capabilities for the given terminal, using short names.",
"",
"Options:",
" -a try all names, print capabilities found",
" -b print boolean-capabilities",
" -d LIST colon-separated list of databases to use",
" -e NAME environment variable to set with -d option",
" -i NAME terminal description to use as names for \"-a\" option, etc.",
" -n print numeric-capabilities",
" -q quiet (prints only counts)",
" -r COUNT repeat for given count",
" -s print string-capabilities",
" -v print termcap-variables",
#ifdef NCURSES_VERSION
" -x print extended capabilities",
#endif
};
unsigned n;
for (n = 0; n < SIZEOF(msg); ++n) {
fprintf(stderr, "%s\n", msg[n]);
}
ExitProgram(EXIT_FAILURE);
}
int
main(int argc, char *argv[])
{
int n;
char *name;
bool a_opt = FALSE;
#if defined(NCURSES_VERSION) || defined(HAVE_CURSES_DATA_OSPEED)
bool v_opt = FALSE;
#endif
char *input_name = 0;
int repeat;
int r_opt = 1;
while ((n = getopt(argc, argv, "abd:e:i:nqr:svxy")) != -1) {
switch (n) {
case 'a':
a_opt = TRUE;
break;
case 'b':
b_opt = TRUE;
break;
case 'd':
d_opt = optarg;
break;
case 'e':
e_opt = optarg;
break;
case 'i':
input_name = optarg;
break;
case 'n':
n_opt = TRUE;
break;
case 'q':
q_opt = TRUE;
break;
case 'r':
if ((r_opt = atoi(optarg)) <= 0)
usage();
break;
case 's':
s_opt = TRUE;
break;
#if defined(NCURSES_VERSION) || defined(HAVE_CURSES_DATA_OSPEED)
case 'v':
v_opt = TRUE;
break;
#endif
#ifdef NCURSES_VERSION
#if NCURSES_XNAMES
case 'x':
x_opt = TRUE;
break;
case 'y':
y_opt = TRUE;
x_opt = TRUE;
break;
#endif
#endif
default:
usage();
break;
}
}
#if HAVE_USE_EXTENDED_NAMES
use_extended_names(x_opt);
#endif
if (!(b_opt || n_opt || s_opt)) {
b_opt = TRUE;
n_opt = TRUE;
s_opt = TRUE;
}
make_dblist();
if (a_opt) {
for (repeat = 0; repeat < r_opt; ++repeat) {
if (optind < argc) {
for (n = optind; n < argc; ++n) {
brute_force(argv[n]);
}
} else if ((name = getenv("TERM")) != 0) {
brute_force(name);
} else {
static char dumb[] = "dumb";
brute_force(dumb);
}
}
} else {
if (input_name != 0) {
parse_description(input_name);
}
#if USE_CODE_LISTS
else {
my_boolcodes = copy_code_list(boolcodes);
my_numcodes = copy_code_list(numcodes);
my_strcodes = copy_code_list(strcodes);
}
#else
else {
failed("no capability-lists available (use -i option)");
}
#endif /* USE_CODE_LISTS */
for (repeat = 0; repeat < r_opt; ++repeat) {
if (optind < argc) {
for (n = optind; n < argc; ++n) {
demo_termcap(argv[n]);
}
} else if ((name = getenv("TERM")) != 0) {
demo_termcap(name);
} else {
static char dumb[] = "dumb";
demo_termcap(dumb);
}
}
}
printf("%ld values (%ld booleans, %ld numbers, %ld strings)\n",
total_values, total_b_values, total_n_values, total_s_values);
#if defined(NCURSES_VERSION) || defined(HAVE_CURSES_DATA_OSPEED)
if (v_opt) {
show_number("PC", PC);
show_string("UP", UP);
show_string("BC", BC);
show_number("ospeed", (int) ospeed);
}
#endif
#if NO_LEAKS
free_dblist();
#if USE_CODE_LISTS
free_code_list(my_boolcodes);
free_code_list(my_numcodes);
free_code_list(my_strcodes);
#endif
#endif /* NO_LEAKS */
ExitProgram(EXIT_SUCCESS);
}
#else
int
main(int argc GCC_UNUSED,
char *argv[]GCC_UNUSED)
{
failed("This program requires termcap");
}
#endif
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