version 1.75, 2010/05/16 13:49:23 |
version 1.79, 2010/05/17 00:06:36 |
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#define ROFF_CTL(c) \ |
#define ROFF_CTL(c) \ |
('.' == (c) || '\'' == (c)) |
('.' == (c) || '\'' == (c)) |
#ifdef ROFF_DEBUG |
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#define ROFF_MDEBUG(p, str) \ |
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fprintf(stderr, "%s: %s (%d:%d)\n", (str), \ |
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roffs[(p)->last->tok].name, \ |
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(p)->last->line, (p)->last->col) |
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#else |
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#define ROFF_MDEBUG(p, str) while (/* CONSTCOND */ 0) |
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#endif |
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enum rofft { |
enum rofft { |
ROFF_if, |
ROFF_if, |
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ROFF_ig, |
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ROFF_cblock, |
ROFF_ccond, |
ROFF_ccond, |
#if 0 |
#if 0 |
ROFF_am, |
ROFF_am, |
ROFF_ami, |
ROFF_ami, |
ROFF_de, |
ROFF_de, |
ROFF_dei, |
ROFF_dei, |
ROFF_ig, |
ROFF_ie, |
ROFF_close, |
ROFF_el, |
#endif |
#endif |
ROFF_MAX |
ROFF_MAX |
}; |
}; |
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void *data; /* privdata for messages */ |
void *data; /* privdata for messages */ |
}; |
}; |
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enum roffrule { |
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ROFFRULE_ALLOW, |
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ROFFRULE_DENY |
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}; |
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struct roffnode { |
struct roffnode { |
enum rofft tok; /* type of node */ |
enum rofft tok; /* type of node */ |
struct roffnode *parent; /* up one in stack */ |
struct roffnode *parent; /* up one in stack */ |
char *end; /* end-token: custom */ |
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int line; /* parse line */ |
int line; /* parse line */ |
int col; /* parse col */ |
int col; /* parse col */ |
int endspan; |
char *end; /* end-rules: custom token */ |
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int endspan; /* end-rules: next-line or infty */ |
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enum roffrule rule; |
}; |
}; |
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#define ROFF_ARGS struct roff *r, /* parse ctx */ \ |
#define ROFF_ARGS struct roff *r, /* parse ctx */ \ |
Line 79 typedef enum rofferr (*roffproc)(ROFF_ARGS); |
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Line 79 typedef enum rofferr (*roffproc)(ROFF_ARGS); |
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struct roffmac { |
struct roffmac { |
const char *name; /* macro name */ |
const char *name; /* macro name */ |
roffproc proc; |
roffproc proc; /* process new macro */ |
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roffproc text; /* process as child text of macro */ |
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roffproc sub; /* process as child of macro */ |
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int flags; |
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#define ROFFMAC_STRUCT (1 << 0) /* always interpret */ |
}; |
}; |
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static enum rofferr roff_if(ROFF_ARGS); |
static enum rofferr roff_if(ROFF_ARGS); |
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static enum rofferr roff_if_text(ROFF_ARGS); |
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static enum rofferr roff_if_sub(ROFF_ARGS); |
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static enum rofferr roff_ig(ROFF_ARGS); |
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static enum rofferr roff_ig_text(ROFF_ARGS); |
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static enum rofferr roff_ig_sub(ROFF_ARGS); |
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static enum rofferr roff_cblock(ROFF_ARGS); |
static enum rofferr roff_ccond(ROFF_ARGS); |
static enum rofferr roff_ccond(ROFF_ARGS); |
#if 0 |
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static enum rofferr roff_new_close(ROFF_ARGS); |
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static enum rofferr roff_new_ig(ROFF_ARGS); |
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static enum rofferr roff_sub_ig(ROFF_ARGS); |
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#endif |
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const struct roffmac roffs[ROFF_MAX] = { |
const struct roffmac roffs[ROFF_MAX] = { |
{ "if", roff_if }, |
{ "if", roff_if, roff_if_text, roff_if_sub, ROFFMAC_STRUCT }, |
{ "\\}", roff_ccond }, |
{ "ig", roff_ig, roff_ig_text, roff_ig_sub, 0 }, |
#if 0 |
{ ".", roff_cblock, NULL, NULL, 0 }, |
{ "am", roff_sub_ig, roff_new_ig }, |
{ "\\}", roff_ccond, NULL, NULL, 0 }, |
{ "ami", roff_sub_ig, roff_new_ig }, |
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{ "de", roff_sub_ig, roff_new_ig }, |
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{ "dei", roff_sub_ig, roff_new_ig }, |
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{ "ig", roff_sub_ig, roff_new_ig }, |
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{ ".", NULL, roff_new_close }, |
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#endif |
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}; |
}; |
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static void roff_free1(struct roff *); |
static void roff_free1(struct roff *); |
static enum rofft roff_hash_find(const char *); |
static enum rofft roff_hash_find(const char *); |
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static void roffnode_cleanscope(struct roff *); |
static int roffnode_push(struct roff *, |
static int roffnode_push(struct roff *, |
enum rofft, int, int); |
enum rofft, int, int); |
static void roffnode_pop(struct roff *); |
static void roffnode_pop(struct roff *); |
Line 166 roffnode_push(struct roff *r, enum rofft tok, int line |
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Line 166 roffnode_push(struct roff *r, enum rofft tok, int line |
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p->parent = r->last; |
p->parent = r->last; |
p->line = line; |
p->line = line; |
p->col = col; |
p->col = col; |
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p->rule = p->parent ? p->parent->rule : ROFFRULE_DENY; |
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r->last = p; |
r->last = p; |
return(1); |
return(1); |
Line 221 roff_parseln(struct roff *r, int ln, |
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Line 222 roff_parseln(struct roff *r, int ln, |
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enum rofft t; |
enum rofft t; |
int ppos; |
int ppos; |
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/* Return when in free text without a context. */ |
/* |
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* First, if a scope is open and we're not a macro, pass the |
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* text through the macro's filter. If a scope isn't open and |
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* we're not a macro, just let it through. |
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*/ |
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if (r->last && ! ROFF_CTL((*bufp)[pos])) { |
if (r->last && ! ROFF_CTL((*bufp)[pos])) { |
/* XXX: this assumes we're just discarding. */ |
t = r->last->tok; |
while (r->last) { |
assert(roffs[t].text); |
if (r->last->endspan-- < 0) |
return((*roffs[t].text) |
break; |
(r, t, bufp, szp, ln, pos, pos, offs)); |
ROFF_MDEBUG(r, "closing implicit scope"); |
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roffnode_pop(r); |
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} |
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return(ROFF_IGN); |
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} else if ( ! ROFF_CTL((*bufp)[pos])) |
} else if ( ! ROFF_CTL((*bufp)[pos])) |
return(ROFF_CONT); |
return(ROFF_CONT); |
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/* There's nothing on the stack: make us anew. */ |
/* |
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* If a scope is open, go to the child handler for that macro, |
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* as it may want to preprocess before doing anything with it. |
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*/ |
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if (r->last) { |
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t = r->last->tok; |
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assert(roffs[t].sub); |
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return((*roffs[t].sub) |
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(r, t, bufp, szp, ln, pos, pos, offs)); |
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} |
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/* |
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* Lastly, as we've no scope open, try to look up and execute |
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* the new macro. If no macro is found, simply return and let |
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* the compilers handle it. |
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*/ |
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ppos = pos; |
ppos = pos; |
if (ROFF_MAX == (t = roff_parse(*bufp, &pos))) |
if (ROFF_MAX == (t = roff_parse(*bufp, &pos))) |
return(ROFF_CONT); |
return(ROFF_CONT); |
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assert(roffs[t].proc); |
assert(roffs[t].proc); |
return((*roffs[t].proc)(r, t, bufp, szp, ln, ppos, pos, offs)); |
return((*roffs[t].proc) |
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(r, t, bufp, szp, ln, ppos, pos, offs)); |
} |
} |
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Line 298 roff_parse(const char *buf, int *pos) |
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Line 316 roff_parse(const char *buf, int *pos) |
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} |
} |
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#if 0 |
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/* ARGSUSED */ |
/* ARGSUSED */ |
static enum rofferr |
static enum rofferr |
roff_sub_ig(ROFF_ARGS) |
roff_cblock(ROFF_ARGS) |
{ |
{ |
int i, j; |
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/* Ignore free-text lines. */ |
/* |
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* A block-close `..' should only be invoked as a child of an |
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* ignore macro, otherwise raise a warning and just ignore it. |
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*/ |
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if ('.' != (*bufp)[ppos] && '\'' != (*bufp)[ppos]) |
if (NULL == r->last) { |
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if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL)) |
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return(ROFF_ERR); |
return(ROFF_IGN); |
return(ROFF_IGN); |
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} |
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if (r->last->end) { |
if (ROFF_ig != r->last->tok) { |
i = ppos + 1; |
if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL)) |
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return(ROFF_ERR); |
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return(ROFF_IGN); |
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} |
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while ((*bufp)[i] && ' ' == (*bufp)[i]) |
if ((*bufp)[pos]) |
i++; |
if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL)) |
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return(ROFF_ERR); |
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for (j = 0; r->last->end[j]; i++, j++) |
roffnode_pop(r); |
if ((*bufp)[i] != r->last->end[j]) |
roffnode_cleanscope(r); |
return(ROFF_IGN); |
return(ROFF_IGN); |
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if (r->last->end[j]) |
} |
return(ROFF_IGN); |
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if ((*bufp)[i] && ' ' != (*bufp)[i]) |
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return(ROFF_IGN); |
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while (' ' == (*bufp)[i]) |
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i++; |
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} else if (ROFF_close != roff_parse(*bufp, &i)) |
static void |
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roffnode_cleanscope(struct roff *r) |
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{ |
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while (r->last) { |
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if (--r->last->endspan < 0) |
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break; |
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roffnode_pop(r); |
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} |
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} |
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/* ARGSUSED */ |
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static enum rofferr |
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roff_ccond(ROFF_ARGS) |
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{ |
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if (NULL == r->last) { |
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if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL)) |
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return(ROFF_ERR); |
return(ROFF_IGN); |
return(ROFF_IGN); |
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} |
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roffnode_pop(r); |
if (ROFF_if != r->last->tok) { |
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if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL)) |
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return(ROFF_ERR); |
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return(ROFF_IGN); |
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} |
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if ('\0' == (*bufp)[i]) |
if (r->last->endspan > -1) { |
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if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL)) |
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return(ROFF_ERR); |
return(ROFF_IGN); |
return(ROFF_IGN); |
if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, i, NULL)) |
} |
return(ROFF_ERR); |
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if ((*bufp)[pos]) |
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if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL)) |
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return(ROFF_ERR); |
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roffnode_pop(r); |
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roffnode_cleanscope(r); |
return(ROFF_IGN); |
return(ROFF_IGN); |
} |
} |
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/* ARGSUSED */ |
/* ARGSUSED */ |
static enum rofferr |
static enum rofferr |
roff_new_close(ROFF_ARGS) |
roff_ig(ROFF_ARGS) |
{ |
{ |
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int sv; |
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size_t sz; |
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if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL)) |
if ( ! roffnode_push(r, tok, ln, ppos)) |
return(ROFF_ERR); |
return(ROFF_ERR); |
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if ('\0' == (*bufp)[pos]) |
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return(ROFF_IGN); |
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sv = pos; |
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while ((*bufp)[pos] && ' ' != (*bufp)[pos] && |
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'\t' != (*bufp)[pos]) |
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pos++; |
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/* |
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* Note: groff does NOT like escape characters in the input. |
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* Instead of detecting this, we're just going to let it fly and |
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* to hell with it. |
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*/ |
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assert(pos > sv); |
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sz = (size_t)(pos - sv); |
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if (1 == sz && '.' == (*bufp)[sv]) |
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return(ROFF_IGN); |
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r->last->end = malloc(sz + 1); |
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if (NULL == r->last->end) { |
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(*r->msg)(MANDOCERR_MEM, r->data, ln, pos, NULL); |
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return(ROFF_ERR); |
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} |
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memcpy(r->last->end, *bufp + sv, sz); |
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r->last->end[(int)sz] = '\0'; |
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if ((*bufp)[pos]) |
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if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL)) |
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return(ROFF_ERR); |
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return(ROFF_IGN); |
return(ROFF_IGN); |
} |
} |
#endif |
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/* ARGSUSED */ |
/* ARGSUSED */ |
static enum rofferr |
static enum rofferr |
roff_ccond(ROFF_ARGS) |
roff_if_sub(ROFF_ARGS) |
{ |
{ |
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enum rofft t; |
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enum roffrule rr; |
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if (NULL == r->last || ROFF_if != r->last->tok || r->last->endspan > -1) { |
ppos = pos; |
if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL)) |
rr = r->last->rule; |
return(ROFF_ERR); |
roffnode_cleanscope(r); |
return(ROFF_IGN); |
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if (ROFF_MAX == (t = roff_parse(*bufp, &pos))) |
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return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT); |
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/* |
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* A denied conditional must evaluate its children if and only |
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* if they're either structurally required (such as loops and |
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* conditionals) or a closing macro. |
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*/ |
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if (ROFFRULE_DENY == rr) |
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if ( ! (ROFFMAC_STRUCT & roffs[t].flags)) |
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if (ROFF_ccond != t) |
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return(ROFF_IGN); |
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assert(roffs[t].proc); |
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return((*roffs[t].proc) |
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(r, t, bufp, szp, ln, ppos, pos, offs)); |
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} |
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/* ARGSUSED */ |
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static enum rofferr |
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roff_ig_sub(ROFF_ARGS) |
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{ |
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enum rofft t; |
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int i, j; |
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/* |
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* First check whether a custom macro exists at this level. If |
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* it does, then check against it. This is some of groff's |
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* stranger behaviours. If we encountered a custom end-scope |
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* tag and that tag also happens to be a "real" macro, then we |
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* need to try interpreting it again as a real macro. If it's |
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* not, then return ignore. Else continue. |
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*/ |
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if (r->last->end) { |
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i = pos + 1; |
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while (' ' == (*bufp)[i] || '\t' == (*bufp)[i]) |
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i++; |
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for (j = 0; r->last->end[j]; j++, i++) |
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if ((*bufp)[i] != r->last->end[j]) |
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break; |
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if ('\0' == r->last->end[j] && |
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('\0' == (*bufp)[i] || |
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' ' == (*bufp)[i] || |
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'\t' == (*bufp)[i])) { |
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roffnode_pop(r); |
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roffnode_cleanscope(r); |
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if (ROFF_MAX != roff_parse(*bufp, &pos)) |
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return(ROFF_RERUN); |
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return(ROFF_IGN); |
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} |
} |
} |
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ROFF_MDEBUG(r, "closing explicit scope"); |
/* |
roffnode_pop(r); |
* If we have no custom end-query or lookup failed, then try |
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* pulling it out of the hashtable. |
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*/ |
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while (r->last) { |
ppos = pos; |
if (--r->last->endspan < 0) |
t = roff_parse(*bufp, &pos); |
break; |
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ROFF_MDEBUG(r, "closing implicit scope"); |
/* If we're not a comment-end, then throw it away. */ |
roffnode_pop(r); |
if (ROFF_cblock != t) |
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return(ROFF_IGN); |
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assert(roffs[t].proc); |
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return((*roffs[t].proc)(r, t, bufp, |
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szp, ln, ppos, pos, offs)); |
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} |
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/* ARGSUSED */ |
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static enum rofferr |
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roff_ig_text(ROFF_ARGS) |
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{ |
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return(ROFF_IGN); |
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} |
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/* ARGSUSED */ |
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static enum rofferr |
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roff_if_text(ROFF_ARGS) |
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{ |
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char *ep, *st; |
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st = &(*bufp)[pos]; |
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if (NULL == (ep = strstr(st, "\\}"))) { |
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roffnode_cleanscope(r); |
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return(ROFF_IGN); |
} |
} |
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if (ep > st && '\\' != *(ep - 1)) |
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roffnode_pop(r); |
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roffnode_cleanscope(r); |
return(ROFF_IGN); |
return(ROFF_IGN); |
} |
} |
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Line 385 roff_ccond(ROFF_ARGS) |
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Line 561 roff_ccond(ROFF_ARGS) |
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static enum rofferr |
static enum rofferr |
roff_if(ROFF_ARGS) |
roff_if(ROFF_ARGS) |
{ |
{ |
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int sv; |
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/* |
/* |
* Read ahead past the conditional. |
* Read ahead past the conditional. |
Line 393 roff_if(ROFF_ARGS) |
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Line 570 roff_if(ROFF_ARGS) |
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* It's good enough for now, however. |
* It's good enough for now, however. |
*/ |
*/ |
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if ( ! roffnode_push(r, tok, ln, ppos)) |
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return(ROFF_ERR); |
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while ((*bufp)[pos] && ' ' != (*bufp)[pos]) |
while ((*bufp)[pos] && ' ' != (*bufp)[pos]) |
pos++; |
pos++; |
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sv = pos; |
while (' ' == (*bufp)[pos]) |
while (' ' == (*bufp)[pos]) |
pos++; |
pos++; |
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/* |
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* Roff is weird. If we have just white-space after the |
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* conditional, it's considered the BODY and we exit without |
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* really doing anything. Warn about this. It's probably |
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* wrong. |
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*/ |
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if ('\0' == (*bufp)[pos] && sv != pos) { |
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if ( ! (*r->msg)(MANDOCERR_NOARGS, r->data, ln, ppos, NULL)) |
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return(ROFF_ERR); |
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return(ROFF_IGN); |
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} |
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if ( ! roffnode_push(r, tok, ln, ppos)) |
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return(ROFF_ERR); |
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/* Don't evaluate: just assume NO. */ |
/* Don't evaluate: just assume NO. */ |
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r->last->endspan = 1; |
r->last->endspan = 1; |
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if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) { |
if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) { |
ROFF_MDEBUG(r, "opening explicit scope"); |
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r->last->endspan = -1; |
r->last->endspan = -1; |
pos += 2; |
pos += 2; |
} else |
} |
ROFF_MDEBUG(r, "opening implicit scope"); |
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if ('\0' == (*bufp)[pos]) |
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return(ROFF_IGN); |
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*offs = pos; |
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return(ROFF_RERUN); |
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} |
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#if 0 |
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static enum rofferr |
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roff_new_ig(ROFF_ARGS) |
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{ |
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int i; |
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if ( ! roffnode_push(r, tok, ln, ppos)) |
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return(ROFF_ERR); |
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/* |
/* |
* Other macros (not `ig') using this routine have additional |
* If there are no arguments on the line, the next-line scope is |
* crap here that we discard. |
* assumed. |
*/ |
*/ |
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if (ROFF_ig != tok) { |
if ('\0' == (*bufp)[pos]) |
while ((*bufp)[ppos] && ' ' != (*bufp)[ppos]) |
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ppos++; |
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while (' ' == (*bufp)[ppos]) |
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ppos++; |
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} |
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i = (int)ppos; |
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while ((*bufp)[i] && ' ' != (*bufp)[i]) |
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i++; |
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if (i == (int)ppos) |
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return(ROFF_IGN); |
return(ROFF_IGN); |
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if ((*bufp)[i]) |
/* Otherwise re-run the roff parser after recalculating. */ |
if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, i, NULL)) |
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return(ROFF_ERR); |
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/* |
*offs = pos; |
* If the macro has arguments, the first argument (up to the |
return(ROFF_RERUN); |
* next whitespace) is interpreted as an argument marking the |
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* macro close. Thus, `.ig foo' will close at `.foo'. |
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* |
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* NOTE: the closing macro `.foo' in the above case is not |
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* allowed to have leading spaces with old groff! Thus `.foo' |
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* != `. foo'. Oh yeah, everything after the `.foo' is lost. |
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* Merry fucking Christmas. |
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*/ |
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r->last->end = malloc((size_t)(i - ppos) + 1); |
|
if (NULL == r->last->end) { |
|
(*r->msg)(MANDOCERR_MEM, r->data, ln, ppos, NULL); |
|
return(ROFF_ERR); |
|
} |
|
|
|
memcpy(r->last->end, &(*bufp)[ppos], (size_t)(i - ppos)); |
|
r->last->end[i - ppos] = '\0'; |
|
|
|
return(ROFF_IGN); |
|
} |
} |
#endif |
|