open-adventure/misc.c
2017-06-26 09:43:11 -07:00

708 lines
20 KiB
C

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <sys/time.h>
#include <ctype.h>
#include "advent.h"
#include "database.h"
#include "linenoise/linenoise.h"
#include "newdb.h"
void* xmalloc(size_t size)
{
void* ptr = malloc(size);
if (ptr == NULL) {
fprintf(stderr, "Out of memory!\n");
exit(EXIT_FAILURE);
}
return (ptr);
}
void packed_to_token(long packed, char token[6])
{
// Unpack and map back to ASCII.
for (int i = 0; i < 5; ++i) {
char advent = (packed >> i * 6) & 63;
token[4 - i] = advent_to_ascii[(int) advent];
}
// Ensure the last character is \0.
token[5] = '\0';
// Replace trailing whitespace with \0.
for (int i = 4; i >= 0; --i) {
if (token[i] == ' ' || token[i] == '\t')
token[i] = '\0';
else
break;
}
}
void token_to_packed(char token[6], long* packed)
{
*packed = 0;
for (size_t i = 0; i < 5; ++i)
{
if (token[4 - i] == '\0')
continue;
char mapped = ascii_to_advent[(int) token[4 - i]];
*packed |= (mapped << (6 * i));
}
}
/* Hide the fact that wods are corrently packed longs */
bool wordeq(token_t a, token_t b)
{
return a == b;
}
bool wordempty(token_t a)
{
return a == 0;
}
void wordclear(token_t *v)
{
*v = 0;
}
/* I/O routines (speak, pspeak, rspeak, GETIN, YES) */
void vspeak(const char* msg, va_list ap)
{
// Do nothing if we got a null pointer.
if (msg == NULL)
return;
// Do nothing if we got an empty string.
if (strlen(msg) == 0)
return;
// Print a newline if the global game.blklin says to.
if (game.blklin == true)
printf("\n");
int msglen = strlen(msg);
// Rendered string
ssize_t size = 2000; /* msglen > 50 ? msglen*2 : 100; */
char* rendered = xmalloc(size);
char* renderp = rendered;
// Handle format specifiers (including the custom %C, %L, %S) by adjusting the parameter accordingly, and replacing the specifier with %s.
long previous_arg = 0;
for (int i = 0; i < msglen; i++) {
if (msg[i] != '%') {
*renderp++ = msg[i];
size--;
} else {
long arg = va_arg(ap, long);
if (arg == -1)
arg = 0;
i++;
// Integer specifier. In order to accommodate the fact that PARMS can have both legitimate integers *and* packed tokens, stringify everything. Future work may eliminate the need for this.
if (msg[i] == 'd') {
int ret = snprintf(renderp, size, "%ld", arg);
if (ret < size) {
renderp += ret;
size -= ret;
}
}
// Unmodified string specifier.
if (msg[i] == 's') {
packed_to_token(arg, renderp); /* unpack directly to destination */
size_t len = strlen(renderp);
renderp += len;
size -= len;
}
// Singular/plural specifier.
if (msg[i] == 'S') {
if (previous_arg > 1) { // look at the *previous* parameter (which by necessity must be numeric)
*renderp++ = 's';
size--;
}
}
// All-lowercase specifier.
if (msg[i] == 'L' || msg[i] == 'C') {
packed_to_token(arg, renderp); /* unpack directly to destination */
int len = strlen(renderp);
for (int j = 0; j < len; ++j) {
renderp[j] = tolower(renderp[j]);
}
if (msg[i] == 'C') // First char uppercase, rest lowercase.
renderp[0] = toupper(renderp[0]);
renderp += len;
size -= len;
}
previous_arg = arg;
}
}
*renderp = 0;
// Print the message.
printf("%s\n", rendered);
free(rendered);
}
void speak(const char* msg, ...)
{
va_list ap;
va_start(ap, msg);
vspeak(msg, ap);
va_end(ap);
}
void pspeak(vocab_t msg, enum speaktype mode, int skip, ...)
/* Find the skip+1st message from msg and print it. Modes are:
* feel = for inventory, what you can touch
* look = the long description for the state the object is in
* listen = the sound for the state the object is in
* study = text on the object. */
{
va_list ap;
va_start(ap, skip);
switch (mode) {
case touch:
vspeak(objects[msg].inventory, ap);
break;
case look:
vspeak(objects[msg].longs[skip], ap);
break;
case hear:
vspeak(objects[msg].sounds[skip], ap);
break;
case study:
vspeak(objects[msg].texts[skip], ap);
break;
}
va_end(ap);
}
void rspeak(vocab_t i, ...)
/* Print the i-th "random" message (section 6 of database). */
{
va_list ap;
va_start(ap, i);
vspeak(arbitrary_messages[i], ap);
va_end(ap);
}
bool GETIN(FILE *input,
long *pword1, long *pword1x,
long *pword2, long *pword2x)
/* Get a command from the adventurer. Snarf out the first word, pad it with
* blanks, and return it in WORD1. Chars 6 thru 10 are returned in WORD1X, in
* case we need to print out the whole word in an error message. Any number of
* blanks may follow the word. If a second word appears, it is returned in
* WORD2 (chars 6 thru 10 in WORD2X), else WORD2 is -1. */
{
long junk;
for (;;) {
if (game.blklin)
fputc('\n', stdout);;
if (!MAPLIN(input))
return false;
*pword1 = GETTXT(true, true, true);
if (game.blklin && *pword1 < 0)
continue;
*pword1x = GETTXT(false, true, true);
do {
junk = GETTXT(false, true, true);
} while
(junk > 0);
*pword2 = GETTXT(true, true, true);
*pword2x = GETTXT(false, true, true);
do {
junk = GETTXT(false, true, true);
} while
(junk > 0);
if (GETTXT(true, true, true) <= 0)
return true;
rspeak(TWO_WORDS);
}
}
void echo_input(FILE* destination, char* input_prompt, char* input)
{
size_t len = strlen(input_prompt) + strlen(input) + 1;
char* prompt_and_input = (char*) xmalloc(len);
strcpy(prompt_and_input, input_prompt);
strcat(prompt_and_input, input);
fprintf(destination, "%s\n", prompt_and_input);
free(prompt_and_input);
}
char* get_input()
{
// Set up the prompt
char input_prompt[] = "> ";
if (!prompt)
input_prompt[0] = '\0';
// Print a blank line if game.blklin tells us to.
if (game.blklin == true)
printf("\n");
char* input;
while (true) {
if (editline)
input = linenoise(input_prompt);
else {
input = NULL;
size_t n = 0;
if (isatty(0))
printf("%s", input_prompt);
IGNORE(getline(&input, &n, stdin));
}
if (input == NULL) // Got EOF; return with it.
return(input);
else if (input[0] == '#') // Ignore comments.
continue;
else // We have a 'normal' line; leave the loop.
break;
}
// Strip trailing newlines from the input
input[strcspn(input, "\n")] = 0;
linenoiseHistoryAdd(input);
if (!isatty(0))
echo_input(stdout, input_prompt, input);
if (logfp)
echo_input(logfp, input_prompt, input);
return (input);
}
bool yes(const char* question, const char* yes_response, const char* no_response)
/* Print message X, wait for yes/no answer. If yes, print Y and return true;
* if no, print Z and return false. */
{
char* reply;
bool outcome;
for (;;) {
speak(question);
reply = get_input();
if (reply == NULL) {
linenoiseFree(reply);
exit(EXIT_SUCCESS);
}
char* firstword = (char*) xmalloc(strlen(reply)+1);
sscanf(reply, "%s", firstword);
for (int i = 0; i < (int)strlen(firstword); ++i)
firstword[i] = tolower(firstword[i]);
int yes = strncmp("yes", firstword, sizeof("yes") - 1);
int y = strncmp("y", firstword, sizeof("y") - 1);
int no = strncmp("no", firstword, sizeof("no") - 1);
int n = strncmp("n", firstword, sizeof("n") - 1);
free(firstword);
if (yes == 0 || y == 0) {
speak(yes_response);
outcome = true;
break;
} else if (no == 0 || n == 0) {
speak(no_response);
outcome = false;
break;
} else
rspeak(PLEASE_ANSWER);
}
linenoiseFree(reply);
return (outcome);
}
/* Line-parsing routines (GETTXT, MAKEWD, PUTTXT, SHFTXT) */
long GETTXT(bool skip, bool onewrd, bool upper)
/* Take characters from an input line and pack them into 30-bit words.
* Skip says to skip leading blanks. ONEWRD says stop if we come to a
* blank. UPPER says to map all letters to uppercase. If we reach the
* end of the line, the word is filled up with blanks (which encode as 0's).
* If we're already at end of line when TEXT is called, we return -1. */
{
long text;
static long splitting = -1;
if (LNPOSN != splitting)
splitting = -1;
text = -1;
while (true) {
if (LNPOSN > LNLENG)
return (text);
if ((!skip) || INLINE[LNPOSN] != 0)
break;
++LNPOSN;
}
text = 0;
for (int I = 1; I <= TOKLEN; I++) {
text = text * 64;
if (LNPOSN > LNLENG || (onewrd && INLINE[LNPOSN] == 0))
continue;
char current = INLINE[LNPOSN];
if (current < ascii_to_advent['%']) {
splitting = -1;
if (upper && current >= ascii_to_advent['a'])
current = current - 26;
text = text + current;
++LNPOSN;
continue;
}
if (splitting != LNPOSN) {
text = text + ascii_to_advent['%'];
splitting = LNPOSN;
continue;
}
text = text + current - ascii_to_advent['%'];
splitting = -1;
++LNPOSN;
}
return text;
}
token_t MAKEWD(long letters)
/* Combine TOKLEN (currently 5) uppercase letters (represented by
* pairs of decimal digits in lettrs) to form a 30-bit value matching
* the one that GETTXT would return given those characters plus
* trailing blanks. Caution: lettrs will overflow 31 bits if
* 5-letter word starts with V-Z. As a kludgey workaround, you can
* increment a letter by 5 by adding 50 to the next pair of
* digits. */
{
long i = 1, word = 0;
for (long k = letters; k != 0; k = k / 100) {
word = word + i * (MOD(k, 50) + 10);
i = i * 64;
if (MOD(k, 100) > 50)word = word + i * 5;
}
i = 64L * 64L * 64L * 64L * 64L / i;
word = word * i;
return word;
}
/* Data structure routines */
long vocab(long id, long init)
/* Look up ID in the vocabulary (ATAB) and return its "definition" (KTAB), or
* -1 if not found. If INIT is positive, this is an initialisation call setting
* up a keyword variable, and not finding it constitutes a bug. It also means
* that only KTAB values which taken over 1000 equal INIT may be considered.
* (Thus "STEPS", which is a motion verb as well as an object, may be located
* as an object.) And it also means the KTAB value is taken modulo 1000. */
{
long lexeme;
for (long i = 1; i <= TABSIZ; i++) {
if (KTAB[i] == -1) {
lexeme = -1;
if (init < 0)
return (lexeme);
BUG(REQUIRED_VOCABULARY_WORD_NOT_FOUND);
}
if (init >= 0 && KTAB[i] / 1000 != init)
continue;
if (ATAB[i] == id) {
lexeme = KTAB[i];
if (init >= 0)
lexeme = MOD(lexeme, 1000);
return (lexeme);
}
}
BUG(RAN_OFF_END_OF_VOCABULARY_TABLE);
}
void juggle(long object)
/* Juggle an object by picking it up and putting it down again, the purpose
* being to get the object to the front of the chain of things at its loc. */
{
long i, j;
i = game.place[object];
j = game.fixed[object];
move(object, i);
move(object + NOBJECTS, j);
}
void move(long object, long where)
/* Place any object anywhere by picking it up and dropping it. May
* already be toting, in which case the carry is a no-op. Mustn't
* pick up objects which are not at any loc, since carry wants to
* remove objects from game.atloc chains. */
{
long from;
if (object > NOBJECTS)
from = game.fixed[object - NOBJECTS];
else
from = game.place[object];
if (from != LOC_NOWHERE && from != CARRIED && !SPECIAL(from))
carry(object, from);
drop(object, where);
}
long put(long object, long where, long pval)
/* PUT is the same as MOVE, except it returns a value used to set up the
* negated game.prop values for the repository objects. */
{
move(object, where);
return (-1) - pval;;
}
void carry(long object, long where)
/* Start toting an object, removing it from the list of things at its former
* location. Incr holdng unless it was already being toted. If object>NOBJECTS
* (moving "fixed" second loc), don't change game.place or game.holdng. */
{
long temp;
if (object <= NOBJECTS) {
if (game.place[object] == CARRIED)
return;
game.place[object] = CARRIED;
++game.holdng;
}
if (game.atloc[where] == object) {
game.atloc[where] = game.link[object];
return;
}
temp = game.atloc[where];
while (game.link[temp] != object) {
temp = game.link[temp];
}
game.link[temp] = game.link[object];
}
void drop(long object, long where)
/* Place an object at a given loc, prefixing it onto the game.atloc list. Decr
* game.holdng if the object was being toted. */
{
if (object > NOBJECTS)
game.fixed[object - NOBJECTS] = where;
else {
if (game.place[object] == CARRIED)
--game.holdng;
game.place[object] = where;
}
if (where <= 0)
return;
game.link[object] = game.atloc[where];
game.atloc[where] = object;
}
long atdwrf(long where)
/* Return the index of first dwarf at the given location, zero if no dwarf is
* there (or if dwarves not active yet), -1 if all dwarves are dead. Ignore
* the pirate (6th dwarf). */
{
long at;
at = 0;
if (game.dflag < 2)
return (at);
at = -1;
for (long i = 1; i <= NDWARVES - 1; i++) {
if (game.dloc[i] == where)
return i;
if (game.dloc[i] != 0)
at = 0;
}
return (at);
}
/* Utility routines (SETBIT, TSTBIT, set_seed, get_next_lcg_value,
* randrange, RNDVOC) */
long setbit(long bit)
/* Returns 2**bit for use in constructing bit-masks. */
{
return (1 << bit);
}
bool tstbit(long mask, int bit)
/* Returns true if the specified bit is set in the mask. */
{
return (mask & (1 << bit)) != 0;
}
void set_seed(long seedval)
/* Set the LCG seed */
{
game.lcg_x = (unsigned long) seedval % game.lcg_m;
}
unsigned long get_next_lcg_value(void)
/* Return the LCG's current value, and then iterate it. */
{
unsigned long old_x = game.lcg_x;
game.lcg_x = (game.lcg_a * game.lcg_x + game.lcg_c) % game.lcg_m;
return old_x;
}
long randrange(long range)
/* Return a random integer from [0, range). */
{
return range * get_next_lcg_value() / game.lcg_m;
}
long rndvoc(long second, long force)
/* Searches the vocabulary ATAB for a word whose second character is
* char, and changes that word such that each of the other four
* characters is a random letter. If force is non-zero, it is used
* as the new word. Returns the new word. */
{
long rnd = force;
if (rnd == 0) {
for (int i = 1; i <= 5; i++) {
long j = 11 + randrange(26);
if (i == 2)
j = second;
rnd = rnd * 64 + j;
}
}
long div = 64L * 64L * 64L;
for (int i = 1; i <= TABSIZ; i++) {
if (MOD(ATAB[i] / div, 64L) == second) {
ATAB[i] = rnd;
break;
}
}
return rnd;
}
/* Machine dependent routines (MAPLIN, SAVEIO) */
bool MAPLIN(FILE *fp)
{
bool eof;
/* Read a line of input, from the specified input source.
* This logic is complicated partly because it has to serve
* several cases with different requirements and partly because
* of a quirk in linenoise().
*
* The quirk shows up when you paste a test log from the clipboard
* to the program's command prompt. While fgets (as expected)
* consumes it a line at a time, linenoise() returns the first
* line and discards the rest. Thus, there needs to be an
* editline (-s) option to fall back to fgets while still
* prompting. Note that linenoise does behave properly when
* fed redirected stdin.
*
* The logging is a bit of a mess because there are two distinct cases
* in which you want to echo commands. One is when shipping them to
* a log under the -l option, in which case you want to suppress
* prompt generation (so test logs are unadorned command sequences).
* On the other hand, if you redirected stdin and are feeding the program
* a logfile, you *do* want prompt generation - it makes checkfiles
* easier to read when the commands are marked by a preceding prompt.
*/
do {
if (!editline) {
if (prompt)
fputs("> ", stdout);
IGNORE(fgets(rawbuf, sizeof(rawbuf) - 1, fp));
eof = (feof(fp));
} else {
char *cp = linenoise("> ");
eof = (cp == NULL);
if (!eof) {
strncpy(rawbuf, cp, sizeof(rawbuf) - 1);
linenoiseHistoryAdd(rawbuf);
strncat(rawbuf, "\n", sizeof(rawbuf) - strlen(rawbuf) - 1);
linenoiseFree(cp);
}
}
} while
(!eof && rawbuf[0] == '#');
if (eof) {
if (logfp && fp == stdin)
fclose(logfp);
return false;
} else {
FILE *efp = NULL;
if (logfp && fp == stdin)
efp = logfp;
else if (!isatty(0))
efp = stdout;
if (efp != NULL) {
if (prompt && efp == stdout)
fputs("> ", efp);
IGNORE(fputs(rawbuf, efp));
}
strcpy(INLINE + 1, rawbuf);
/* translate the chars to integers in the range 0-126 and store
* them in the common array "INLINE". Integer values are as follows:
* 0 = space [ASCII CODE 40 octal, 32 decimal]
* 1-2 = !" [ASCII 41-42 octal, 33-34 decimal]
* 3-10 = '()*+,-. [ASCII 47-56 octal, 39-46 decimal]
* 11-36 = upper-case letters
* 37-62 = lower-case letters
* 63 = percent (%) [ASCII 45 octal, 37 decimal]
* 64-73 = digits, 0 through 9
* Remaining characters can be translated any way that is convenient;
* The above mappings are required so that certain special
* characters are known to fit in 6 bits and/or can be easily spotted.
* Array elements beyond the end of the line should be filled with 0,
* and LNLENG should be set to the index of the last character.
*
* If the data file uses a character other than space (e.g., tab) to
* separate numbers, that character should also translate to 0.
*
* This procedure may use the map1,map2 arrays to maintain
* static data for he mapping. MAP2(1) is set to 0 when the
* program starts and is not changed thereafter unless the
* routines in this module choose to do so. */
LNLENG = 0;
for (long i = 1; i <= (long)sizeof(INLINE) && INLINE[i] != 0; i++) {
long val = INLINE[i];
INLINE[i] = ascii_to_advent[val];
if (INLINE[i] != 0)
LNLENG = i;
}
LNPOSN = 1;
return true;
}
}
void datime(long* d, long* t)
{
struct timeval tv;
gettimeofday(&tv, NULL);
*d = (long) tv.tv_sec;
*t = (long) tv.tv_usec;
}
void bug(enum bugtype num, const char *error_string)
{
fprintf(stderr, "Fatal error %d, %s.\n", num, error_string);
exit(EXIT_FAILURE);
}
/* end */