ref: b66f7af07003a601e2e125e2c2926586c8664571
dir: neatroff/tr.c
/* built-in troff requests */
#include <u.h>
#include <libc.h>
#include <ctype.h>
#include <stdio.h>
#include "roff.h"
static int tr_nl = 1; /* just read a newline */
static int tr_bm = -1; /* blank line macro */
static int tr_sm = -1; /* leading space macro */
char c_pc[GNLEN] = "%"; /* page number character */
int c_ec = '\\'; /* escape character */
int c_cc = '.'; /* control character */
int c_c2 = '\''; /* no-break control character */
/* skip everything until the end of line */
static void jmp_eol(void)
{
int c;
do {
c = cp_next();
} while (c >= 0 && c != '\n');
}
static void tr_vs(char **args)
{
int vs = args[1] ? eval_re(args[1], n_v, 'p') : n_v0;
n_v0 = n_v;
n_v = MAX(0, vs);
}
static void tr_ls(char **args)
{
int ls = args[1] ? eval_re(args[1], n_L, 0) : n_L0;
n_L0 = n_L;
n_L = MAX(1, ls);
}
static void tr_pl(char **args)
{
int n = eval_re(args[1] ? args[1] : "11i", n_p, 'v');
n_p = MAX(0, n);
}
static void tr_nr(char **args)
{
int id;
if (!args[2])
return;
id = map(args[1]);
num_set(id, eval_re(args[2], num_get(id), 'u'));
if (args[3])
num_setinc(id, eval(args[3], 'u'));
}
static void tr_rr(char **args)
{
int i;
for (i = 1; i < NARGS; i++)
if (args[i])
num_del(map(args[i]));
}
static void tr_af(char **args)
{
if (args[2])
num_setfmt(map(args[1]), args[2]);
}
static void tr_ds(char **args)
{
str_set(map(args[1]), args[2] ? args[2] : "");
}
static void tr_as(char **args)
{
int reg;
char *s1, *s2, *s;
reg = map(args[1]);
s1 = str_get(reg) ? str_get(reg) : "";
s2 = args[2] ? args[2] : "";
s = xmalloc(strlen(s1) + strlen(s2) + 1);
strcpy(s, s1);
strcat(s, s2);
str_set(reg, s);
free(s);
}
static void tr_rm(char **args)
{
int i;
for (i = 1; i < NARGS; i++)
if (args[i])
str_rm(map(args[i]));
}
static void tr_rn(char **args)
{
if (!args[2])
return;
str_rn(map(args[1]), map(args[2]));
}
static void tr_po(char **args)
{
int po = args[1] ? eval_re(args[1], n_o, 'm') : n_o0;
n_o0 = n_o;
n_o = MAX(0, po);
}
/* read a string argument of a macro */
static char *read_string(void)
{
struct sbuf sbuf;
int c;
int empty;
sbuf_init(&sbuf);
cp_copymode(1);
while ((c = cp_next()) == ' ')
;
empty = c <= 0 || c == '\n';
if (c == '"')
c = cp_next();
while (c > 0 && c != '\n') {
if (c != c_ni)
sbuf_add(&sbuf, c);
c = cp_next();
}
if (c >= 0)
cp_back(c);
cp_copymode(0);
if (empty) {
sbuf_done(&sbuf);
return nil;
}
return sbuf_out(&sbuf);
}
/* read a space separated macro argument; if two, read at most two characters */
static char *read_name(int two)
{
struct sbuf sbuf;
int c = cp_next();
int i = 0;
sbuf_init(&sbuf);
while (c == ' ' || c == '\t' || c == c_ni)
c = cp_next();
while (c > 0 && c != ' ' && c != '\t' && c != '\n' && (!two || i < 2)) {
if (c != c_ni) {
sbuf_add(&sbuf, c);
i++;
}
c = cp_next();
}
if (c >= 0)
cp_back(c);
return sbuf_out(&sbuf);
}
static void macrobody(struct sbuf *sbuf, char *end)
{
int first = 1;
int c;
char *req = nil;
cp_back('\n');
cp_copymode(1);
while ((c = cp_next()) >= 0) {
if (sbuf && !first)
sbuf_add(sbuf, c);
first = 0;
if (c == '\n') {
if ((c = cp_next()) != c_cc) {
cp_back(c);
continue;
}
req = read_name(n_cp);
if (!strcmp(end, req)) {
in_push(end, nil);
cp_back(c_cc);
break;
}
if (sbuf) {
sbuf_add(sbuf, c_cc);
sbuf_append(sbuf, req);
}
free(req);
req = nil;
}
}
free(req);
cp_copymode(0);
}
static void tr_de(char **args)
{
struct sbuf sbuf;
int id;
if (!args[1])
return;
id = map(args[1]);
sbuf_init(&sbuf);
if (args[0][1] == 'a' && args[0][2] == 'm' && str_get(id))
sbuf_append(&sbuf, str_get(id));
macrobody(&sbuf, args[2] ? args[2] : ".");
str_set(id, sbuf_buf(&sbuf));
sbuf_done(&sbuf);
if (!n_cp && args[3]) /* parse the arguments as request argv[3] */
str_dset(id, str_dget(map(args[3])));
}
static void tr_ig(char **args)
{
macrobody(nil, args[1] ? args[1] : ".");
}
/* read into sbuf until stop; if stop is nil, stop at whitespace */
static int read_until(struct sbuf *sbuf, char *stop,
int (*next)(void), void (*back)(int))
{
char cs[GNLEN], cs2[GNLEN];
int c;
while ((c = next()) >= 0) {
if (c == c_ni)
continue;
back(c);
if (c == '\n')
return 1;
if (!stop && (c == ' ' || c == '\t'))
return 0;
charnext(cs, next, back);
if (stop && !strcmp(stop, cs))
return 0;
charnext_str(cs2, cs);
sbuf_append(sbuf, cs2);
}
return 1;
}
/* evaluate .if strcmp (i.e. 'str'str') */
static int if_strcmp(int (*next)(void), void (*back)(int))
{
char delim[GNLEN];
struct sbuf s1, s2;
int ret;
charnext(delim, next, back);
sbuf_init(&s1);
sbuf_init(&s2);
read_until(&s1, delim, next, back);
read_until(&s2, delim, next, back);
cp_reqbeg();
ret = !strcmp(sbuf_buf(&s1), sbuf_buf(&s2));
sbuf_done(&s1);
sbuf_done(&s2);
return ret;
}
/* evaluate .if condition letters */
static int if_cond(int (*next)(void), void (*back)(int))
{
switch (cp_next()) {
case 'o':
return n_pg % 2;
case 'e':
return !(n_pg % 2);
case 't':
return 1;
case 'n':
return 0;
}
return 0;
}
/* evaluate .if condition */
static int if_eval(int (*next)(void), void (*back)(int))
{
struct sbuf sbuf;
int ret;
sbuf_init(&sbuf);
read_until(&sbuf, nil, next, back);
ret = eval(sbuf_buf(&sbuf), '\0') > 0;
sbuf_done(&sbuf);
return ret;
}
static int eval_if(int (*next)(void), void (*back)(int))
{
int neg = 0;
int ret;
int c;
do {
c = next();
} while (c == ' ' || c == '\t');
if (c == '!') {
neg = 1;
c = next();
}
back(c);
if (strchr("oetn", c)) {
ret = if_cond(next, back);
} else if (c == ' ') {
ret = 0;
} else if (!isdigit(c) && !strchr("-+*/%<=>&:.|()", c)) {
ret = if_strcmp(next, back);
} else {
ret = if_eval(next, back);
}
return ret != neg;
}
static int ie_cond[NIES]; /* .ie condition stack */
static int ie_depth;
static void tr_if(char **args)
{
int c = eval_if(cp_next, cp_back);
if (args[0][1] == 'i' && args[0][2] == 'e') /* .ie command */
if (ie_depth < NIES)
ie_cond[ie_depth++] = c;
cp_blk(!c);
}
static void tr_el(char **args)
{
cp_blk(ie_depth > 0 ? ie_cond[--ie_depth] : 1);
}
static void tr_na(char **args)
{
n_na = 1;
}
static int adjmode(int c, int def)
{
switch (c) {
case 'l':
return AD_L;
case 'r':
return AD_R;
case 'c':
return AD_C;
case 'b':
case 'n':
return AD_B;
case 'k':
return AD_B | AD_K;
}
return def;
}
static void tr_ad(char **args)
{
char *s = args[1];
n_na = 0;
if (!s)
return;
if (isdigit((unsigned char) s[0]))
n_j = atoi(s) & 15;
else
n_j = s[0] == 'p' ? AD_P | adjmode(s[1], AD_B) : adjmode(s[0], n_j);
}
static void tr_tm(char **args)
{
fprintf(stderr, "%s\n", args[1] ? args[1] : "");
}
static void tr_so(char **args)
{
if (args[1])
in_so(args[1]);
}
static void tr_nx(char **args)
{
in_nx(args[1]);
}
static void tr_shift(char **args)
{
int n = args[1] ? atoi(args[1]) : 1;
while (n-- >= 1)
in_shift();
}
static void tr_ex(char **args)
{
in_ex();
}
static void tr_sy(char **args)
{
char *a[64] = { "rc", "-c", nil};
char **s, **d;
s = args + 1;
d = a + 2;
while((*d++ = *s++) != nil)
;
if(fork() == 0){
exec("/bin/rc", a);
sysfatal("exec: %r");
}
waitpid();
}
static void tr_lt(char **args)
{
int lt = args[1] ? eval_re(args[1], n_lt, 'm') : n_t0;
n_t0 = n_t0;
n_lt = MAX(0, lt);
}
static void tr_pc(char **args)
{
char *s = args[1];
if (!s || charread(&s, c_pc) < 0)
strcpy(c_pc, "");
}
static void tr_tl(char **args)
{
int c;
do {
c = cp_next();
} while (c >= 0 && (c == ' ' || c == '\t'));
cp_back(c);
ren_tl(cp_next, cp_back);
do {
c = cp_next();
} while (c >= 0 && c != '\n');
}
static void tr_ec(char **args)
{
c_ec = args[1] ? args[1][0] : '\\';
}
static void tr_cc(char **args)
{
c_cc = args[1] ? args[1][0] : '.';
}
static void tr_c2(char **args)
{
c_c2 = args[1] ? args[1][0] : '\'';
}
static void tr_eo(char **args)
{
c_ec = -1;
}
static void tr_hc(char **args)
{
char *s = args[1];
if (!s || charread(&s, c_hc) < 0)
strcpy(c_hc, "\\%");
}
/* sentence ending and their transparent characters */
static char eos_sent[NCHARS][GNLEN] = { ".", "?", "!", };
static int eos_sentcnt = 3;
static char eos_tran[NCHARS][GNLEN] = { "'", "\"", ")", "]", "*", };
static int eos_trancnt = 5;
static void tr_eos(char **args)
{
eos_sentcnt = 0;
eos_trancnt = 0;
if (args[1]) {
char *s = args[1];
while (s && charread(&s, eos_sent[eos_sentcnt]) >= 0)
if (eos_sentcnt < NCHARS - 1)
eos_sentcnt++;
}
if (args[2]) {
char *s = args[2];
while (s && charread(&s, eos_tran[eos_trancnt]) >= 0)
if (eos_trancnt < NCHARS - 1)
eos_trancnt++;
}
}
int c_eossent(char *s)
{
int i;
for (i = 0; i < eos_sentcnt; i++)
if (!strcmp(eos_sent[i], s))
return 1;
return 0;
}
int c_eostran(char *s)
{
int i;
for (i = 0; i < eos_trancnt; i++)
if (!strcmp(eos_tran[i], s))
return 1;
return 0;
}
/* hyphenation dashes and hyphenation inhibiting character */
static char hy_dash[NCHARS][GNLEN] = { "\\:", "-", "em", "en", "\\-", "--", "hy", };
static int hy_dashcnt = 7;
static char hy_stop[NCHARS][GNLEN] = { "\\%", };
static int hy_stopcnt = 1;
static void tr_nh(char **args)
{
n_hy = 0;
}
static void tr_hy(char **args)
{
n_hy = args[1] ? eval_re(args[1], n_hy, '\0') : 1;
}
static void tr_hlm(char **args)
{
n_hlm = args[1] ? eval_re(args[1], n_hlm, '\0') : 0;
}
static void tr_hycost(char **args)
{
n_hycost = args[1] ? eval_re(args[1], n_hycost, '\0') : 0;
n_hycost2 = args[2] ? eval_re(args[2], n_hycost2, '\0') : 0;
n_hycost3 = args[3] ? eval_re(args[3], n_hycost3, '\0') : 0;
}
static void tr_hydash(char **args)
{
hy_dashcnt = 0;
if (args[1]) {
char *s = args[1];
while (s && charread(&s, hy_dash[hy_dashcnt]) >= 0)
if (hy_dashcnt < NCHARS - 1)
hy_dashcnt++;
}
}
static void tr_hystop(char **args)
{
hy_stopcnt = 0;
if (args[1]) {
char *s = args[1];
while (s && charread(&s, hy_stop[hy_stopcnt]) >= 0)
if (hy_stopcnt < NCHARS - 1)
hy_stopcnt++;
}
}
int c_hydash(char *s)
{
int i;
for (i = 0; i < hy_dashcnt; i++)
if (!strcmp(hy_dash[i], s))
return 1;
return 0;
}
int c_hystop(char *s)
{
int i;
for (i = 0; i < hy_stopcnt; i++)
if (!strcmp(hy_stop[i], s))
return 1;
return 0;
}
int c_hymark(char *s)
{
return !strcmp(c_bp, s) || !strcmp(c_hc, s);
}
static void tr_pmll(char **args)
{
n_pmll = args[1] ? eval_re(args[1], n_pmll, '\0') : 0;
n_pmllcost = args[2] ? eval_re(args[2], n_pmllcost, '\0') : 100;
}
static void tr_lg(char **args)
{
if (args[1])
n_lg = eval(args[1], '\0');
}
static void tr_kn(char **args)
{
if (args[1])
n_kn = eval(args[1], '\0');
}
static void tr_cp(char **args)
{
if (args[1])
n_cp = atoi(args[1]);
}
static void tr_ss(char **args)
{
if (args[1]) {
n_ss = eval_re(args[1], n_ss, 0);
n_sss = args[2] ? eval_re(args[2], n_sss, 0) : n_ss;
}
}
static void tr_ssh(char **args)
{
n_ssh = args[1] ? eval_re(args[1], n_ssh, 0) : 0;
}
static void tr_cs(char **args)
{
struct font *fn = args[1] ? dev_font(dev_pos(args[1])) : nil;
if (fn)
font_setcs(fn, args[2] ? eval(args[2], 0) : 0,
args[3] ? eval(args[3], 0) : 0);
}
static void tr_fzoom(char **args)
{
struct font *fn = args[1] ? dev_font(dev_pos(args[1])) : nil;
if (fn)
font_setzoom(fn, args[2] ? eval(args[2], 0) : 0);
}
static void tr_tkf(char **args)
{
struct font *fn = args[1] ? dev_font(dev_pos(args[1])) : nil;
if (fn && args[5])
font_track(fn, eval(args[2], 0), eval(args[3], 0),
eval(args[4], 0), eval(args[5], 0));
}
static void tr_ff(char **args)
{
struct font *fn = args[1] ? dev_font(dev_pos(args[1])) : nil;
int i;
for (i = 2; i < NARGS; i++)
if (fn && args[i] && args[i][0] && args[i][1])
font_feat(fn, args[i] + 1, args[i][0] == '+');
}
static void tr_ffsc(char **args)
{
struct font *fn = args[1] ? dev_font(dev_pos(args[1])) : nil;
if (fn)
font_scrp(fn, args[2]);
if (fn)
font_lang(fn, args[3]);
}
static void tr_nm(char **args)
{
if (!args[1]) {
n_nm = 0;
return;
}
n_nm = 1;
n_ln = eval_re(args[1], n_ln, 0);
n_ln = MAX(0, n_ln);
if (args[2] && isdigit((unsigned char) args[2][0]))
n_nM = MAX(1, eval(args[2], 0));
if (args[3] && isdigit((unsigned char) args[3][0]))
n_nS = MAX(0, eval(args[3], 0));
if (args[4] && isdigit((unsigned char) args[4][0]))
n_nI = MAX(0, eval(args[4], 0));
}
static void tr_nn(char **args)
{
n_nn = args[1] ? eval(args[1], 0) : 1;
}
static void tr_bd(char **args)
{
struct font *fn = args[1] ? dev_font(dev_pos(args[1])) : nil;
if (!args[1] || !strcmp("S", args[1]))
return;
if (fn)
font_setbd(fn, args[2] ? eval(args[2], 'u') : 0);
}
static void tr_it(char **args)
{
if (args[2]) {
n_it = map(args[2]);
n_itn = eval(args[1], 0);
} else {
n_it = 0;
}
}
static void tr_mc(char **args)
{
char *s = args[1];
if (s && charread(&s, c_mc) >= 0) {
n_mc = 1;
n_mcn = args[2] ? eval(args[2], 'm') : SC_EM;
} else {
n_mc = 0;
}
}
static void tr_tc(char **args)
{
char *s = args[1];
if (!s || charread(&s, c_tc) < 0)
strcpy(c_tc, "");
}
static void tr_lc(char **args)
{
char *s = args[1];
if (!s || charread(&s, c_lc) < 0)
strcpy(c_lc, "");
}
static void tr_lf(char **args)
{
if (args[1])
in_lf(args[2], eval(args[1], 0));
}
static void tr_chop(char **args)
{
struct sbuf sbuf;
int id;
id = map(args[1]);
if (str_get(id)) {
sbuf_init(&sbuf);
sbuf_append(&sbuf, str_get(id));
if (!sbuf_empty(&sbuf)) {
sbuf_cut(&sbuf, sbuf_len(&sbuf) - 1);
str_set(id, sbuf_buf(&sbuf));
}
sbuf_done(&sbuf);
}
}
/* character translation (.tr) */
static struct dict *cmap; /* character mapping */
static char cmap_src[NCMAPS][GNLEN]; /* source character */
static char cmap_dst[NCMAPS][GNLEN]; /* character mapping */
static int cmap_n; /* number of translated character */
void cmap_add(char *c1, char *c2)
{
int i = dict_get(cmap, c1);
if (i >= 0) {
strcpy(cmap_dst[i], c2);
} else if (cmap_n < NCMAPS) {
strcpy(cmap_src[cmap_n], c1);
strcpy(cmap_dst[cmap_n], c2);
dict_put(cmap, cmap_src[cmap_n], cmap_n);
cmap_n++;
}
}
char *cmap_map(char *c)
{
int i = dict_get(cmap, c);
return i >= 0 ? cmap_dst[i] : c;
}
static void tr_tr(char **args)
{
char *s = args[1];
char c1[GNLEN], c2[GNLEN];
while (s && charread(&s, c1) >= 0) {
if (charread(&s, c2) < 0)
strcpy(c2, " ");
cmap_add(c1, c2);
}
}
/* character definition (.char) */
static char cdef_src[NCDEFS][GNLEN]; /* source character */
static char *cdef_dst[NCDEFS]; /* character definition */
static int cdef_fn[NCDEFS]; /* owning font */
static int cdef_n; /* number of defined characters */
static int cdef_expanding; /* inside cdef_expand() call */
static int cdef_find(char *c, int fn)
{
int i;
for (i = 0; i < cdef_n; i++)
if ((!cdef_fn[i] || cdef_fn[i] == fn) && !strcmp(cdef_src[i], c))
return i;
return -1;
}
/* return the definition of the given character */
char *cdef_map(char *c, int fn)
{
int i = cdef_find(c, fn);
return !cdef_expanding && i >= 0 ? cdef_dst[i] : nil;
}
int cdef_expand(struct wb *wb, char *s, int fn)
{
char *d = cdef_map(s, fn);
if (!d)
return 1;
cdef_expanding = 1;
ren_parse(wb, d);
cdef_expanding = 0;
return 0;
}
static void cdef_remove(char *fn, char *cs)
{
char c[GNLEN];
int i;
int fp = fn ? dev_pos(fn) : -1;
if (!cs || charread(&cs, c) < 0)
return;
for (i = 0; i < cdef_n; i++) {
if (!strcmp(cdef_src[i], c)) {
if (!fn || (fp > 0 && cdef_fn[i] == fp)) {
free(cdef_dst[i]);
cdef_dst[i] = nil;
cdef_src[i][0] = '\0';
}
}
}
}
static void cdef_add(char *fn, char *cs, char *def)
{
char c[GNLEN];
int i;
if (!def || charread(&cs, c) < 0)
return;
i = cdef_find(c, fn ? dev_pos(fn) : -1);
if (i < 0) {
for (i = 0; i < cdef_n; i++)
if (!cdef_dst[i])
break;
if (i == cdef_n && cdef_n < NCDEFS)
cdef_n++;
}
if (i >= 0 && i < cdef_n) {
snprintf(cdef_src[i], sizeof(cdef_src[i]), "%s", c);
cdef_dst[i] = xmalloc(strlen(def) + 1);
strcpy(cdef_dst[i], def);
cdef_fn[i] = fn ? dev_pos(fn) : 0;
}
}
static void tr_rchar(char **args)
{
int i;
for (i = 1; i < NARGS; i++)
if (args[i])
cdef_remove(nil, args[i]);
}
static void tr_char(char **args)
{
if (args[2])
cdef_add(nil, args[1], args[2]);
else
cdef_remove(nil, args[1]);
}
static void tr_ochar(char **args)
{
if (args[3])
cdef_add(args[1], args[2], args[3]);
else
cdef_remove(args[1], args[2]);
}
static void tr_fmap(char **args)
{
struct font *fn = args[1] ? dev_font(dev_pos(args[1])) : nil;
if (fn && args[2])
font_map(fn, args[2], args[3]);
}
static void tr_blm(char **args)
{
tr_bm = args[1] ? map(args[1]) : -1;
}
static void tr_lsm(char **args)
{
tr_sm = args[1] ? map(args[1]) : -1;
}
static void tr_co(char **args)
{
char *src = args[1];
char *dst = args[2];
if (src && dst && str_get(map(src)))
str_set(map(dst), str_get(map(src)));
}
static void tr_coa(char **args)
{
char *src = args[1];
char *dst = args[2];
if (src && dst && str_get(map(src))) {
struct sbuf sb;
sbuf_init(&sb);
if (str_get(map(dst)))
sbuf_append(&sb, str_get(map(dst)));
sbuf_append(&sb, str_get(map(src)));
str_set(map(dst), sbuf_buf(&sb));
sbuf_done(&sb);
}
}
static void tr_coo(char **args)
{
char *reg = args[1];
char *path = args[2];
FILE *fp;
if (!reg || !reg[0] || !path || !path[0])
return;
if ((fp = fopen(path, "w"))) {
if (str_get(map(reg)))
fputs(str_get(map(reg)), fp);
fclose(fp);
}
}
static void tr_coi(char **args)
{
char *reg = args[1];
char *path = args[2];
char buf[1024];
FILE *fp;
if (!reg || !reg[0] || !path || !path[0])
return;
if ((fp = fopen(path + 1, "r"))) {
struct sbuf sb;
sbuf_init(&sb);
while (fgets(buf, sizeof(buf), fp))
sbuf_append(&sb, buf);
str_set(map(reg), sbuf_buf(&sb));
sbuf_done(&sb);
fclose(fp);
}
}
static void tr_dv(char **args)
{
if (args[1])
out_x(args[1]);
}
/* read a single macro argument */
static int macroarg(struct sbuf *sbuf, int brk, int (*next)(void), void (*back)(int))
{
int quoted = 0;
int c;
c = next();
while (c == ' ')
c = next();
if (c == '\n' || c == brk)
back(c);
if (c < 0 || c == '\n' || c == brk)
return 1;
if (c == '"') {
quoted = 1;
c = next();
}
while (c >= 0 && c != '\n' && (quoted || c != brk)) {
if (!quoted && c == ' ')
break;
if (quoted && c == '"') {
c = next();
if (c != '"')
break;
}
if (c == c_ec) {
sbuf_add(sbuf, c);
c = next();
}
sbuf_add(sbuf, c);
c = next();
}
sbuf_add(sbuf, 0);
if (c >= 0)
back(c);
return 0;
}
/* split the arguments in sbuf, after calling one of mkargs_*() */
static void chopargs(struct sbuf *sbuf, char **args)
{
char *s = sbuf_buf(sbuf);
char *e = s + sbuf_len(sbuf);
int n = 0;
while (n < NARGS && s && s < e) {
args[n++] = s;
if ((s = memchr(s, '\0', e - s)))
s++;
}
}
/* read macro arguments; free the returned pointer when done */
char *tr_args(char **args, int brk, int (*next)(void), void (*back)(int))
{
struct sbuf sbuf;
sbuf_init(&sbuf);
while (!macroarg(&sbuf, brk, next, back))
;
chopargs(&sbuf, args);
return sbuf_out(&sbuf);
}
/* read regular macro arguments */
static void mkargs_macro(struct sbuf *sbuf)
{
cp_copymode(1);
while (!macroarg(sbuf, -1, cp_next, cp_back))
;
jmp_eol();
cp_copymode(0);
}
/* read request arguments; trims tabs too */
static void mkargs_req(struct sbuf *sbuf)
{
int n = 0;
int c;
c = cp_next();
while (n < NARGS) {
int ok = 0;
while (c == ' ' || c == '\t')
c = cp_next();
while (c >= 0 && c != '\n' && c != ' ' && c != '\t') {
if (c != c_ni)
sbuf_add(sbuf, c);
c = cp_next();
ok = 1;
}
if (ok) {
n++;
sbuf_add(sbuf, 0);
}
if (c == '\n')
cp_back(c);
if (c < 0 || c == '\n')
break;
}
jmp_eol();
}
/* read arguments for .ds and .char */
static void mkargs_ds(struct sbuf *sbuf)
{
char *s = read_name(n_cp);
sbuf_append(sbuf, s);
sbuf_add(sbuf, 0);
free(s);
s = read_string();
if (s) {
sbuf_append(sbuf, s);
sbuf_add(sbuf, 0);
free(s);
}
jmp_eol();
}
/* read arguments for .ochar */
static void mkargs_ochar(struct sbuf *sbuf)
{
char *s = read_name(0);
sbuf_append(sbuf, s);
sbuf_add(sbuf, 0);
free(s);
mkargs_ds(sbuf);
}
/* read arguments for .nr */
static void mkargs_reg1(struct sbuf *sbuf)
{
char *s = read_name(n_cp);
sbuf_append(sbuf, s);
sbuf_add(sbuf, 0);
free(s);
mkargs_req(sbuf);
}
/* do not read any arguments; for .if, .ie and .el */
static void mkargs_null(struct sbuf *sbuf)
{
}
/* read the whole line for .tm */
static void mkargs_eol(struct sbuf *sbuf)
{
int c;
cp_copymode(1);
c = cp_next();
while (c == ' ')
c = cp_next();
while (c >= 0 && c != '\n') {
if (c != c_ni)
sbuf_add(sbuf, c);
c = cp_next();
}
cp_copymode(0);
}
static struct cmd {
char *id;
void (*f)(char **args);
void (*args)(struct sbuf *sbuf);
} cmds[] = {
{TR_DIVBEG, tr_divbeg},
{TR_DIVEND, tr_divend},
{TR_DIVVS, tr_divvs},
{TR_POPREN, tr_popren},
{">>", tr_l2r},
{"<<", tr_r2l},
{"ab", tr_ab, mkargs_eol},
{"ad", tr_ad},
{"af", tr_af},
{"am", tr_de, mkargs_reg1},
{"as", tr_as, mkargs_ds},
{"bd", tr_bd},
{"blm", tr_blm},
{"bp", tr_bp},
{"br", tr_br},
{"c2", tr_c2},
{"cc", tr_cc},
{"ce", tr_ce},
{"ch", tr_ch},
{"char", tr_char, mkargs_ds},
{"chop", tr_chop, mkargs_reg1},
{"cl", tr_cl},
{"co", tr_co},
{"co+", tr_coa},
{"co<", tr_coi, mkargs_ds},
{"co>", tr_coo, mkargs_ds},
{"cp", tr_cp},
{"cs", tr_cs},
{"da", tr_di},
{"de", tr_de, mkargs_reg1},
{"di", tr_di},
{"ds", tr_ds, mkargs_ds},
{"dt", tr_dt},
{"dv", tr_dv, mkargs_eol},
{"ec", tr_ec},
{"el", tr_el, mkargs_null},
{"em", tr_em},
{"eo", tr_eo},
{"eos", tr_eos},
{"ev", tr_ev},
{"ex", tr_ex},
{"fc", tr_fc},
{"ff", tr_ff},
{"fi", tr_fi},
{"fl", tr_br},
{"fmap", tr_fmap},
{"fp", tr_fp},
{"ffsc", tr_ffsc},
{"fspecial", tr_fspecial},
{"ft", tr_ft},
{"fzoom", tr_fzoom},
{"hc", tr_hc},
{"hcode", tr_hcode},
{"hlm", tr_hlm},
{"hpf", tr_hpf},
{"hpfa", tr_hpfa},
{"hy", tr_hy},
{"hycost", tr_hycost},
{"hydash", tr_hydash},
{"hystop", tr_hystop},
{"hw", tr_hw},
{"ie", tr_if, mkargs_null},
{"if", tr_if, mkargs_null},
{"ig", tr_ig},
{"in", tr_in},
{"in2", tr_in2},
{"it", tr_it},
{"kn", tr_kn},
{"lc", tr_lc},
{"lf", tr_lf},
{"lg", tr_lg},
{"ll", tr_ll},
{"ls", tr_ls},
{"lsm", tr_lsm},
{"lt", tr_lt},
{"mc", tr_mc},
{"mk", tr_mk},
{"na", tr_na},
{"ne", tr_ne},
{"nf", tr_nf},
{"nh", tr_nh},
{"nm", tr_nm},
{"nn", tr_nn},
{"nr", tr_nr, mkargs_reg1},
{"ns", tr_ns},
{"nx", tr_nx},
{"ochar", tr_ochar, mkargs_ochar},
{"os", tr_os},
{"pc", tr_pc},
{"pl", tr_pl},
{"pmll", tr_pmll},
{"pn", tr_pn},
{"po", tr_po},
{"ps", tr_ps},
{"rchar", tr_rchar},
{"rm", tr_rm},
{"rn", tr_rn},
{"rr", tr_rr},
{"rs", tr_rs},
{"rt", tr_rt},
{"shift", tr_shift},
{"so", tr_so},
{"sp", tr_sp},
{"ss", tr_ss},
{"ssh", tr_ssh},
{"sv", tr_sv},
{"sy", tr_sy, mkargs_eol},
{"ta", tr_ta},
{"tc", tr_tc},
{"ti", tr_ti},
{"ti2", tr_ti2},
{"tkf", tr_tkf},
{"tl", tr_tl, mkargs_null},
{"tm", tr_tm, mkargs_eol},
{"tr", tr_tr, mkargs_eol},
{"vs", tr_vs},
{"wh", tr_wh},
};
static char *dotted(char *name, int dot)
{
char *out = xmalloc(strlen(name) + 2);
out[0] = dot;
strcpy(out + 1, name);
return out;
}
/* execute a built-in request */
void tr_req(int reg, char **args)
{
struct cmd *req = str_dget(reg);
if (req)
req->f(args);
}
/* interpolate a macro for tr_nextreq() */
static void tr_nextreq_exec(char *mac, char *arg0, int readargs)
{
char *args[NARGS + 3] = {arg0};
struct cmd *req = str_dget(map(mac));
char *str = str_get(map(mac));
struct sbuf sbuf;
sbuf_init(&sbuf);
if (readargs) {
if (req && req->args)
req->args(&sbuf);
if (req && !req->args)
mkargs_req(&sbuf);
if (!req)
mkargs_macro(&sbuf);
chopargs(&sbuf, args + 1);
}
if (str)
in_push(str, args);
if (!str && req)
req->f(args);
sbuf_done(&sbuf);
}
/* read the next troff request; return zero if a request was executed. */
int tr_nextreq(void)
{
char *mac;
char *arg0 = nil;
int c;
if (!tr_nl)
return 1;
c = cp_next();
/* transparent line indicator */
if (c == c_ec) {
int c2 = cp_next();
if (c2 == '!') {
char *args[NARGS + 3] = {"\\!"};
struct sbuf sbuf;
sbuf_init(&sbuf);
cp_copymode(1);
mkargs_eol(&sbuf);
cp_copymode(0);
chopargs(&sbuf, args + 1);
tr_transparent(args);
sbuf_done(&sbuf);
return 0;
}
cp_back(c2);
}
/* not a request, a blank line, or a line with leading spaces */
if (c < 0 || (c != c_cc && c != c_c2 &&
(c != '\n' || tr_bm < 0) &&
(c != ' ' || tr_sm < 0))) {
cp_back(c);
return 1;
}
cp_reqbeg();
if (c == '\n') { /* blank line macro */
mac = malloc(strlen(map_name(tr_bm)) + 1);
strcpy(mac, map_name(tr_bm));
arg0 = dotted(mac, '.');
tr_nextreq_exec(mac, arg0, 0);
} else if (c == ' ') { /* leading space macro */
int i;
mac = malloc(strlen(map_name(tr_sm)) + 1);
strcpy(mac, map_name(tr_sm));
for (i = 0; c == ' '; i++)
c = cp_next();
cp_back(c);
n_lsn = i;
arg0 = dotted(mac, '.');
tr_nextreq_exec(mac, arg0, 0);
} else {
mac = read_name(n_cp);
arg0 = dotted(mac, c);
tr_nextreq_exec(mac, arg0, 1);
}
free(arg0);
free(mac);
return 0;
}
int tr_next(void)
{
int c;
while (!tr_nextreq())
;
c = cp_next();
tr_nl = c == '\n' || c < 0;
return c;
}
void tr_init(void)
{
int i;
for (i = 0; i < LEN(cmds); i++)
str_dset(map(cmds[i].id), &cmds[i]);
cmap = dict_make(-1, 0, 2);
}
void tr_done(void)
{
int i;
for (i = 0; i < cdef_n; i++)
free(cdef_dst[i]);
dict_free(cmap);
}