version 1.17, 2009/06/18 10:53:58 |
version 1.29, 2009/10/24 05:45:05 |
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#include "libman.h" |
#include "libman.h" |
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#define FL_NLINE (1 << 0) |
#define REW_REWIND (0) /* See rew_scope(). */ |
#define FL_TLINE (1 << 1) |
#define REW_NOHALT (1) /* See rew_scope(). */ |
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#define REW_HALT (2) /* See rew_scope(). */ |
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static int man_args(struct man *, int, |
static int in_line_eoln(MACRO_PROT_ARGS); |
int *, char *, char **); |
static int blk_imp(MACRO_PROT_ARGS); |
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static int blk_close(MACRO_PROT_ARGS); |
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static int man_flags[MAN_MAX] = { |
static int rew_scope(enum man_type, struct man *, int); |
0, /* br */ |
static int rew_dohalt(int, enum man_type, |
0, /* TH */ |
const struct man_node *); |
0, /* SH */ |
static int rew_block(int, enum man_type, |
0, /* SS */ |
const struct man_node *); |
FL_TLINE, /* TP */ |
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0, /* LP */ |
const struct man_macro __man_macros[MAN_MAX] = { |
0, /* PP */ |
{ in_line_eoln, 0 }, /* br */ |
0, /* P */ |
{ in_line_eoln, 0 }, /* TH */ |
0, /* IP */ |
{ blk_imp, MAN_SCOPED }, /* SH */ |
0, /* HP */ |
{ blk_imp, MAN_SCOPED }, /* SS */ |
FL_NLINE, /* SM */ |
{ blk_imp, MAN_SCOPED | MAN_FSCOPED }, /* TP */ |
FL_NLINE, /* SB */ |
{ blk_imp, 0 }, /* LP */ |
FL_NLINE, /* BI */ |
{ blk_imp, 0 }, /* PP */ |
FL_NLINE, /* IB */ |
{ blk_imp, 0 }, /* P */ |
FL_NLINE, /* BR */ |
{ blk_imp, 0 }, /* IP */ |
FL_NLINE, /* RB */ |
{ blk_imp, 0 }, /* HP */ |
FL_NLINE, /* R */ |
{ in_line_eoln, MAN_SCOPED }, /* SM */ |
FL_NLINE, /* B */ |
{ in_line_eoln, MAN_SCOPED }, /* SB */ |
FL_NLINE, /* I */ |
{ in_line_eoln, 0 }, /* BI */ |
FL_NLINE, /* IR */ |
{ in_line_eoln, 0 }, /* IB */ |
FL_NLINE, /* RI */ |
{ in_line_eoln, 0 }, /* BR */ |
0, /* na */ |
{ in_line_eoln, 0 }, /* RB */ |
FL_NLINE, /* i */ |
{ in_line_eoln, MAN_SCOPED }, /* R */ |
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{ in_line_eoln, MAN_SCOPED }, /* B */ |
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{ in_line_eoln, MAN_SCOPED }, /* I */ |
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{ in_line_eoln, 0 }, /* IR */ |
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{ in_line_eoln, 0 }, /* RI */ |
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{ in_line_eoln, 0 }, /* na */ |
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{ in_line_eoln, 0 }, /* i */ |
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{ in_line_eoln, 0 }, /* sp */ |
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{ in_line_eoln, 0 }, /* nf */ |
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{ in_line_eoln, 0 }, /* fi */ |
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{ in_line_eoln, 0 }, /* r */ |
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{ blk_close, 0 }, /* RE */ |
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{ blk_imp, MAN_EXPLICIT }, /* RS */ |
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{ in_line_eoln, 0 }, /* DT */ |
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{ in_line_eoln, 0 }, /* UC */ |
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{ in_line_eoln, 0 }, /* PD */ |
}; |
}; |
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const struct man_macro * const man_macros = __man_macros; |
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int |
int |
man_macro(struct man *man, int tok, int line, |
man_unscope(struct man *m, const struct man_node *n) |
int ppos, int *pos, char *buf) |
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{ |
{ |
int w, la; |
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char *p; |
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struct man_node *n; |
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if ( ! man_elem_alloc(man, line, ppos, tok)) |
assert(n); |
return(0); |
m->next = MAN_NEXT_SIBLING; |
n = man->last; |
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man->next = MAN_NEXT_CHILD; |
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for (;;) { |
/* LINTED */ |
la = *pos; |
while (m->last != n) { |
w = man_args(man, line, pos, buf, &p); |
if ( ! man_valid_post(m)) |
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if (-1 == w) |
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return(0); |
return(0); |
if (0 == w) |
if ( ! man_action_post(m)) |
break; |
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if ( ! man_word_alloc(man, line, la, p)) |
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return(0); |
return(0); |
man->next = MAN_NEXT_SIBLING; |
m->last = m->last->parent; |
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assert(m->last); |
} |
} |
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if (n == man->last && (FL_NLINE & man_flags[tok])) { |
if ( ! man_valid_post(m)) |
if (MAN_NLINE & man->flags) |
return(0); |
return(man_perr(man, line, ppos, WLNSCOPE)); |
return(man_action_post(m)); |
man->flags |= MAN_NLINE; |
} |
return(1); |
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} |
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if (FL_TLINE & man_flags[tok]) { |
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if (MAN_NLINE & man->flags) |
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return(man_perr(man, line, ppos, WLNSCOPE)); |
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man->flags |= MAN_NLINE; |
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return(1); |
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} |
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/* |
static int |
* Note that when TH is pruned, we'll be back at the root, so |
rew_block(int ntok, enum man_type type, const struct man_node *n) |
* make sure that we don't clobber as its sibling. |
{ |
*/ |
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for ( ; man->last; man->last = man->last->parent) { |
if (MAN_BLOCK == type && ntok == n->parent->tok && |
if (man->last == n) |
MAN_BODY == n->parent->type) |
break; |
return(REW_REWIND); |
if (man->last->type == MAN_ROOT) |
return(ntok == n->tok ? REW_HALT : REW_NOHALT); |
break; |
} |
if ( ! man_valid_post(man)) |
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return(0); |
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if ( ! man_action_post(man)) |
/* |
return(0); |
* There are three scope levels: scoped to the root (all), scoped to the |
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* section (all less sections), and scoped to subsections (all less |
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* sections and subsections). |
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*/ |
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static int |
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rew_dohalt(int tok, enum man_type type, const struct man_node *n) |
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{ |
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int c; |
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if (MAN_ROOT == n->type) |
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return(REW_HALT); |
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assert(n->parent); |
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if (MAN_ROOT == n->parent->type) |
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return(REW_REWIND); |
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if (MAN_VALID & n->flags) |
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return(REW_NOHALT); |
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/* Rewind to ourselves, first. */ |
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if (type == n->type && tok == n->tok) |
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return(REW_REWIND); |
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switch (tok) { |
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case (MAN_SH): |
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break; |
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case (MAN_SS): |
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/* Rewind to a section, if a block. */ |
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if (REW_NOHALT != (c = rew_block(MAN_SH, type, n))) |
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return(c); |
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break; |
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case (MAN_RS): |
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/* Rewind to a subsection, if a block. */ |
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if (REW_NOHALT != (c = rew_block(MAN_SS, type, n))) |
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return(c); |
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/* Rewind to a section, if a block. */ |
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if (REW_NOHALT != (c = rew_block(MAN_SH, type, n))) |
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return(c); |
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break; |
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default: |
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/* Rewind to an offsetter, if a block. */ |
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if (REW_NOHALT != (c = rew_block(MAN_RS, type, n))) |
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return(c); |
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/* Rewind to a subsection, if a block. */ |
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if (REW_NOHALT != (c = rew_block(MAN_SS, type, n))) |
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return(c); |
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/* Rewind to a section, if a block. */ |
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if (REW_NOHALT != (c = rew_block(MAN_SH, type, n))) |
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return(c); |
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break; |
} |
} |
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assert(man->last); |
return(REW_NOHALT); |
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} |
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/* |
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* Same here regarding whether we're back at the root. |
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*/ |
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if (man->last->type != MAN_ROOT && ! man_valid_post(man)) |
/* |
return(0); |
* Rewinding entails ascending the parse tree until a coherent point, |
if (man->last->type != MAN_ROOT && ! man_action_post(man)) |
* for example, the `SH' macro will close out any intervening `SS' |
return(0); |
* scopes. When a scope is closed, it must be validated and actioned. |
if (man->last->type != MAN_ROOT) |
*/ |
man->next = MAN_NEXT_SIBLING; |
static int |
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rew_scope(enum man_type type, struct man *m, int tok) |
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{ |
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struct man_node *n; |
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int c; |
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return(1); |
/* LINTED */ |
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for (n = m->last; n; n = n->parent) { |
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/* |
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* Whether we should stop immediately (REW_HALT), stop |
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* and rewind until this point (REW_REWIND), or keep |
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* rewinding (REW_NOHALT). |
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*/ |
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c = rew_dohalt(tok, type, n); |
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if (REW_HALT == c) |
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return(1); |
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if (REW_REWIND == c) |
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break; |
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} |
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/* Rewind until the current point. */ |
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assert(n); |
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return(man_unscope(m, n)); |
} |
} |
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/* ARGSUSED */ |
int |
int |
man_macroend(struct man *m) |
blk_close(MACRO_PROT_ARGS) |
{ |
{ |
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int ntok; |
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const struct man_node *nn; |
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for ( ; m->last && m->last != m->first; |
switch (tok) { |
m->last = m->last->parent) { |
case (MAN_RE): |
if ( ! man_valid_post(m)) |
ntok = MAN_RS; |
return(0); |
break; |
if ( ! man_action_post(m)) |
default: |
return(0); |
abort(); |
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/* NOTREACHED */ |
} |
} |
assert(m->last == m->first); |
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if ( ! man_valid_post(m)) |
for (nn = m->last->parent; nn; nn = nn->parent) |
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if (ntok == nn->tok) |
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break; |
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if (NULL == nn) |
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if ( ! man_pwarn(m, line, ppos, WNOSCOPE)) |
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return(0); |
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if ( ! rew_scope(MAN_BODY, m, ntok)) |
return(0); |
return(0); |
if ( ! man_action_post(m)) |
if ( ! rew_scope(MAN_BLOCK, m, ntok)) |
return(0); |
return(0); |
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m->next = MAN_NEXT_SIBLING; |
return(1); |
return(1); |
} |
} |
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/* ARGSUSED */ |
/* |
static int |
* Parse an implicit-block macro. These contain a MAN_HEAD and a |
man_args(struct man *m, int line, |
* MAN_BODY contained within a MAN_BLOCK. Rules for closing out other |
int *pos, char *buf, char **v) |
* scopes, such as `SH' closing out an `SS', are defined in the rew |
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* routines. |
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*/ |
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int |
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blk_imp(MACRO_PROT_ARGS) |
{ |
{ |
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int w, la; |
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char *p; |
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struct man_node *n; |
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if (0 == buf[*pos]) |
/* Close out prior scopes. */ |
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if ( ! rew_scope(MAN_BODY, m, tok)) |
return(0); |
return(0); |
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if ( ! rew_scope(MAN_BLOCK, m, tok)) |
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return(0); |
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/* First parse non-quoted strings. */ |
/* Allocate new block & head scope. */ |
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if ('\"' != buf[*pos]) { |
if ( ! man_block_alloc(m, line, ppos, tok)) |
*v = &buf[*pos]; |
return(0); |
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if ( ! man_head_alloc(m, line, ppos, tok)) |
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return(0); |
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while (buf[*pos]) { |
n = m->last; |
if (' ' == buf[*pos]) |
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if ('\\' != buf[*pos - 1]) |
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break; |
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(*pos)++; |
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} |
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if (0 == buf[*pos]) |
/* Add line arguments. */ |
return(1); |
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buf[(*pos)++] = 0; |
for (;;) { |
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la = *pos; |
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w = man_args(m, line, pos, buf, &p); |
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if (0 == buf[*pos]) |
if (-1 == w) |
return(1); |
return(0); |
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if (0 == w) |
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break; |
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while (buf[*pos] && ' ' == buf[*pos]) |
if ( ! man_word_alloc(m, line, la, p)) |
(*pos)++; |
return(0); |
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} |
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if (buf[*pos]) |
/* Close out head and open body (unless MAN_SCOPE). */ |
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if (MAN_SCOPED & man_macros[tok].flags) { |
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/* If we're forcing scope (`TP'), keep it open. */ |
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if (MAN_FSCOPED & man_macros[tok].flags) { |
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m->flags |= MAN_BLINE; |
return(1); |
return(1); |
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} else if (n == m->last) { |
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m->flags |= MAN_BLINE; |
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return(1); |
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} |
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} |
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if ( ! man_pwarn(m, line, *pos, WTSPACE)) |
if ( ! rew_scope(MAN_HEAD, m, tok)) |
return(-1); |
return(0); |
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return(man_body_alloc(m, line, ppos, tok)); |
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} |
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int |
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in_line_eoln(MACRO_PROT_ARGS) |
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{ |
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int w, la; |
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char *p; |
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struct man_node *n; |
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if ( ! man_elem_alloc(m, line, ppos, tok)) |
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return(0); |
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n = m->last; |
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for (;;) { |
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la = *pos; |
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w = man_args(m, line, pos, buf, &p); |
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if (-1 == w) |
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return(0); |
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if (0 == w) |
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break; |
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if ( ! man_word_alloc(m, line, la, p)) |
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return(0); |
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} |
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if (n == m->last && MAN_SCOPED & man_macros[tok].flags) { |
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m->flags |= MAN_ELINE; |
return(1); |
return(1); |
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} |
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/* |
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* Note that when TH is pruned, we'll be back at the root, so |
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* make sure that we don't clobber as its sibling. |
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*/ |
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for ( ; m->last; m->last = m->last->parent) { |
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if (m->last == n) |
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break; |
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if (m->last->type == MAN_ROOT) |
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break; |
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if ( ! man_valid_post(m)) |
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return(0); |
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if ( ! man_action_post(m)) |
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return(0); |
} |
} |
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assert(m->last); |
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/* |
/* |
* If we're a quoted string (and quoted strings are allowed), |
* Same here regarding whether we're back at the root. |
* then parse ahead to the next quote. If none's found, it's an |
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* error. After, parse to the next word. |
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*/ |
*/ |
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*v = &buf[++(*pos)]; |
if (m->last->type != MAN_ROOT && ! man_valid_post(m)) |
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return(0); |
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if (m->last->type != MAN_ROOT && ! man_action_post(m)) |
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return(0); |
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if (m->last->type != MAN_ROOT) |
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m->next = MAN_NEXT_SIBLING; |
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while (buf[*pos] && '\"' != buf[*pos]) |
return(1); |
(*pos)++; |
} |
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if (0 == buf[*pos]) { |
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if ( ! man_pwarn(m, line, *pos, WTQUOTE)) |
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return(-1); |
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return(1); |
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} |
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buf[(*pos)++] = 0; |
int |
if (0 == buf[*pos]) |
man_macroend(struct man *m) |
return(1); |
{ |
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struct man_node *n; |
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while (buf[*pos] && ' ' == buf[*pos]) |
n = MAN_VALID & m->last->flags ? |
(*pos)++; |
m->last->parent : m->last; |
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if (buf[*pos]) |
for ( ; n; n = n->parent) { |
return(1); |
if (MAN_BLOCK != n->type) |
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continue; |
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if ( ! (MAN_EXPLICIT & man_macros[n->tok].flags)) |
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continue; |
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if ( ! man_nwarn(m, n, WEXITSCOPE)) |
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return(0); |
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} |
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if ( ! man_pwarn(m, line, *pos, WTSPACE)) |
return(man_unscope(m, m->first)); |
return(-1); |
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return(1); |
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} |
} |
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