version 1.68, 2010/05/15 18:43:59 |
version 1.74, 2010/05/16 10:59:36 |
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#include "roff.h" |
#include "roff.h" |
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enum rofft { |
enum rofft { |
ROFF_de, |
#if 0 |
ROFF_dei, |
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ROFF_am, |
ROFF_am, |
ROFF_ami, |
ROFF_ami, |
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ROFF_de, |
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ROFF_dei, |
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ROFF_if, |
ROFF_ig, |
ROFF_ig, |
ROFF_close, |
ROFF_close, |
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#endif |
ROFF_MAX |
ROFF_MAX |
}; |
}; |
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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 */ |
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char *end; /* end-token: custom */ |
int line; /* parse line */ |
int line; /* parse line */ |
int col; /* parse col */ |
int col; /* parse col */ |
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int flags; |
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#define ROFF_PARSEONLY (1 << 0) |
}; |
}; |
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#define ROFF_ARGS struct roff *r, /* parse ctx */ \ |
#define ROFF_ARGS struct roff *r, /* parse ctx */ \ |
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enum rofft tok, /* tok of macro */ \ |
char **bufp, /* input buffer */ \ |
char **bufp, /* input buffer */ \ |
size_t *szp, /* size of input buffer */ \ |
size_t *szp, /* size of input buffer */ \ |
int ln, /* parse line */ \ |
int ln, /* parse line */ \ |
int ppos /* current pos in buffer */ |
int ppos, /* current pos in buffer */ \ |
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int *offs /* reset offset of buffer data */ |
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typedef enum rofferr (*roffproc)(ROFF_ARGS); |
typedef enum rofferr (*roffproc)(ROFF_ARGS); |
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roffproc new; /* root of stack (type = ROFF_MAX) */ |
roffproc new; /* root of stack (type = ROFF_MAX) */ |
}; |
}; |
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static enum rofferr roff_ignore(ROFF_ARGS); |
#if 0 |
static enum rofferr roff_new_close(ROFF_ARGS); |
static enum rofferr roff_new_close(ROFF_ARGS); |
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static enum rofferr roff_new_if(ROFF_ARGS); |
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static enum rofferr roff_sub_if(ROFF_ARGS); |
static enum rofferr roff_new_ig(ROFF_ARGS); |
static enum rofferr roff_new_ig(ROFF_ARGS); |
static enum rofferr roff_sub_ig(ROFF_ARGS); |
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] = { |
{ "de", NULL, roff_ignore }, |
#if 0 |
{ "dei", NULL, roff_ignore }, |
{ "am", roff_sub_ig, roff_new_ig }, |
{ "am", NULL, roff_ignore }, |
{ "ami", roff_sub_ig, roff_new_ig }, |
{ "ami", NULL, roff_ignore }, |
{ "de", roff_sub_ig, roff_new_ig }, |
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{ "dei", roff_sub_ig, roff_new_ig }, |
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{ "if", roff_sub_if, roff_new_if }, |
{ "ig", roff_sub_ig, roff_new_ig }, |
{ "ig", roff_sub_ig, roff_new_ig }, |
{ ".", NULL, roff_new_close }, |
{ ".", NULL, roff_new_close }, |
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#endif |
}; |
}; |
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static void roff_alloc1(struct roff *); |
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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 *); |
static int roffnode_push(struct roff *, |
static int roffnode_push(struct roff *, |
Line 116 roffnode_pop(struct roff *r) |
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Line 129 roffnode_pop(struct roff *r) |
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if (NULL == (p = r->last)) |
if (NULL == (p = r->last)) |
return; |
return; |
r->last = p->parent; |
r->last = p->parent; |
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if (p->end) |
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free(p->end); |
free(p); |
free(p); |
} |
} |
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Line 153 roff_free1(struct roff *r) |
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Line 168 roff_free1(struct roff *r) |
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} |
} |
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static void |
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roff_alloc1(struct roff *r) |
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{ |
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/* Do nothing for now. */ |
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} |
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void |
void |
roff_reset(struct roff *r) |
roff_reset(struct roff *r) |
{ |
{ |
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roff_free1(r); |
roff_free1(r); |
roff_alloc1(r); |
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} |
} |
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Line 196 roff_alloc(const mandocmsg msg, void *data) |
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Line 202 roff_alloc(const mandocmsg msg, void *data) |
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enum rofferr |
enum rofferr |
roff_parseln(struct roff *r, int ln, char **bufp, size_t *szp) |
roff_parseln(struct roff *r, int ln, |
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char **bufp, size_t *szp, int pos, int *offs) |
{ |
{ |
enum rofft t; |
enum rofft t; |
int ppos; |
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/* If stacked, jump directly into its processing function. */ |
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if (NULL != r->last) { |
if (NULL != r->last) { |
/* |
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* If there's a node on the stack, then jump directly |
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* into its processing function. |
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*/ |
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t = r->last->tok; |
t = r->last->tok; |
assert(roffs[t].sub); |
assert(roffs[t].sub); |
return((*roffs[t].sub)(r, bufp, szp, ln, 0)); |
return((*roffs[t].sub)(r, t, bufp, szp, ln, pos, offs)); |
} else if ('.' != (*bufp)[0] && NULL == r->last) |
} |
/* Return when in free text without a context. */ |
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/* Return when in free text without a context. */ |
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if ('.' != (*bufp)[0] && '\'' != (*bufp)[0] && NULL == r->last) |
return(ROFF_CONT); |
return(ROFF_CONT); |
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/* There's nothing on the stack: make us anew. */ |
/* There's nothing on the stack: make us anew. */ |
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if (ROFF_MAX == (t = roff_parse(*bufp, &ppos))) |
if (ROFF_MAX == (t = roff_parse(*bufp, &pos))) |
return(ROFF_CONT); |
return(ROFF_CONT); |
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assert(roffs[t].new); |
assert(roffs[t].new); |
return((*roffs[t].new)(r, bufp, szp, ln, ppos)); |
return((*roffs[t].new)(r, t, bufp, szp, ln, pos, offs)); |
} |
} |
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int |
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roff_endparse(struct roff *r) |
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{ |
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if (NULL == r->last) |
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return(1); |
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return((*r->msg)(MANDOCERR_SCOPEEXIT, r->data, r->last->line, |
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r->last->col, NULL)); |
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} |
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/* |
/* |
* Parse a roff node's type from the input buffer. This must be in the |
* Parse a roff node's type from the input buffer. This must be in the |
* form of ".foo xxx" in the usual way. |
* form of ".foo xxx" in the usual way. |
Line 234 roff_parse(const char *buf, int *pos) |
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Line 252 roff_parse(const char *buf, int *pos) |
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char mac[5]; |
char mac[5]; |
enum rofft t; |
enum rofft t; |
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assert('.' == buf[0]); |
assert('.' == buf[0] || '\'' == buf[0]); |
*pos = 1; |
*pos = 1; |
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while (buf[*pos] && (' ' == buf[*pos] || '\t' == buf[*pos])) |
while (buf[*pos] && (' ' == buf[*pos] || '\t' == buf[*pos])) |
Line 264 roff_parse(const char *buf, int *pos) |
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Line 282 roff_parse(const char *buf, int *pos) |
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} |
} |
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#if 0 |
/* ARGSUSED */ |
/* ARGSUSED */ |
static enum rofferr |
static enum rofferr |
roff_ignore(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_sub_ig(ROFF_ARGS) |
roff_sub_ig(ROFF_ARGS) |
{ |
{ |
enum rofft t; |
int i, j; |
int pos; |
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/* Ignore free-text lines. */ |
/* Ignore free-text lines. */ |
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if ('.' != (*bufp)[ppos]) |
if ('.' != (*bufp)[ppos] && '\'' != (*bufp)[ppos]) |
return(ROFF_IGN); |
return(ROFF_IGN); |
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/* Ignore macros unless it's a closing macro. */ |
if (r->last->end) { |
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i = ppos + 1; |
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t = roff_parse(*bufp, &pos); |
while ((*bufp)[i] && ' ' == (*bufp)[i]) |
if (ROFF_close != t) |
i++; |
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for (j = 0; r->last->end[j]; i++, j++) |
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if ((*bufp)[i] != r->last->end[j]) |
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return(ROFF_IGN); |
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if (r->last->end[j]) |
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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)) |
return(ROFF_IGN); |
return(ROFF_IGN); |
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roffnode_pop(r); |
roffnode_pop(r); |
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if ('\0' == (*bufp)[i]) |
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return(ROFF_IGN); |
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if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, i, NULL)) |
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return(ROFF_ERR); |
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return(ROFF_IGN); |
return(ROFF_IGN); |
} |
} |
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Line 301 static enum rofferr |
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Line 331 static enum rofferr |
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roff_new_close(ROFF_ARGS) |
roff_new_close(ROFF_ARGS) |
{ |
{ |
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/* |
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if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL)) |
if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL)) |
return(ROFF_ERR); |
return(ROFF_ERR); |
*/ |
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return(ROFF_CONT); |
return(ROFF_IGN); |
} |
} |
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/* ARGSUSED */ |
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static enum rofferr |
static enum rofferr |
roff_new_ig(ROFF_ARGS) |
roff_sub_if(ROFF_ARGS) |
{ |
{ |
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int i; |
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enum rofft t; |
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return(roffnode_push(r, ROFF_ig, ln, ppos) ? |
i = (int)strlen(*bufp); |
ROFF_IGN : ROFF_ERR); |
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if (i > 1 && '}' == (*bufp)[i - 1] && '\\' == (*bufp)[i - 2]) |
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roffnode_pop(r); |
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return(ROFF_IGN); |
} |
} |
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int |
static enum rofferr |
roff_endparse(struct roff *r) |
roff_new_if(ROFF_ARGS) |
{ |
{ |
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struct roffnode *n; |
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enum rofferr re; |
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if (NULL == r->last) |
/* |
return(1); |
* Read ahead past the conditional. |
return((*r->msg)(MANDOCERR_SCOPEEXIT, r->data, |
* FIXME: this does not work, as conditionals don't end on |
r->last->line, r->last->col, NULL)); |
* whitespace, but are parsed according to a formal grammar. |
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* It's good enough for now, however. |
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*/ |
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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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if ( ! roffnode_push(r, tok, ln, ppos)) |
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return(ROFF_ERR); |
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n = r->last; |
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/* Don't evaluate: just assume NO. */ |
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r->last->flags |= ROFF_PARSEONLY; |
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if ('\\' == (*bufp)[ppos] && '{' == (*bufp)[ppos + 1]) { |
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re = roff_parseln(r, ln, bufp, szp, pos); |
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if (ROFF_ERR == re) |
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return(re); |
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if (r->last == n) |
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roffnode_pop(r, tok, ln, ppos); |
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return(re); |
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} |
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return(ROFF_IGN); |
} |
} |
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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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/* |
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* Other macros (not `ig') using this routine have additional |
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* crap here that we discard. |
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*/ |
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if (ROFF_ig != tok) { |
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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); |
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if ((*bufp)[i]) |
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if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, i, NULL)) |
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return(ROFF_ERR); |
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/* |
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* If the macro has arguments, the first argument (up to the |
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* 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); |
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if (NULL == r->last->end) { |
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(*r->msg)(MANDOCERR_MEM, r->data, ln, ppos, NULL); |
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return(ROFF_ERR); |
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} |
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memcpy(r->last->end, &(*bufp)[ppos], (size_t)(i - ppos)); |
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r->last->end[i - ppos] = '\0'; |
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return(ROFF_IGN); |
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} |
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#endif |