-/* $Id: read.c,v 1.198 2018/08/23 19:33:27 schwarze Exp $ */
+/* $Id: read.c,v 1.201 2018/12/13 06:18:20 schwarze Exp $ */
/*
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010-2018 Ingo Schwarze <schwarze@openbsd.org>
#include "mdoc.h"
#include "man.h"
#include "libmandoc.h"
+#include "roff_int.h"
#define REPARSE_LIMIT 1000
const char *file; /* filename of current input file */
struct buf *primary; /* buffer currently being parsed */
struct buf *secondary; /* copy of top level input */
+ struct buf *loop; /* open .while request line */
const char *os_s; /* default operating system */
mandocmsg mmsg; /* warning/error message handler */
enum mandoclevel file_status; /* status of current parse */
static void choose_parser(struct mparse *);
static void free_buf_list(struct buf *);
static void resize_buf(struct buf *, size_t);
-static enum rofferr mparse_buf_r(struct mparse *, struct buf, size_t, int);
+static int mparse_buf_r(struct mparse *, struct buf, size_t, int);
static int read_whole_file(struct mparse *, const char *, int,
struct buf *, int *);
static void mparse_end(struct mparse *);
"unknown library name",
"invalid content in Rs block",
"invalid Boolean argument",
+ "argument contains two font escapes",
"unknown font, skipping request",
"odd number of characters in request",
"skipping display without arguments",
"missing list type, using -item",
"argument is not numeric, using 1",
+ "argument is not a character",
"missing manual name, using \"\"",
"uname(3) system call failed, using UNKNOWN",
"unknown standard specifier",
"input too large",
"unsupported control character",
"unsupported roff request",
+ "nested .while loops",
+ "end of scope with open .while loop",
+ "end of .while loop in inner scope",
+ "cannot continue this .while loop",
"eqn delim option in tbl",
"unsupported tbl layout modifier",
"ignoring macro in table",
* macros, inline equations, and input line traps)
* and indirectly (for .so file inclusion).
*/
-static enum rofferr
+static int
mparse_buf_r(struct mparse *curp, struct buf blk, size_t i, int start)
{
struct buf ln;
- struct buf *firstln, *lastln, *thisln;
+ struct buf *firstln, *lastln, *thisln, *loop;
const char *save_file;
char *cp;
size_t pos; /* byte number in the ln buffer */
- enum rofferr line_result, result;
+ int line_result, result;
int of;
int lnn; /* line number in the real file */
int fd;
+ int inloop; /* Saw .while on this level. */
unsigned char c;
ln.sz = 256;
ln.buf = mandoc_malloc(ln.sz);
ln.next = NULL;
- firstln = NULL;
+ firstln = loop = NULL;
lnn = curp->line;
pos = 0;
+ inloop = 0;
result = ROFF_CONT;
- while (i < blk.sz) {
- if (0 == pos && '\0' == blk.buf[i])
- break;
-
+ while (i < blk.sz && (blk.buf[i] != '\0' || pos != 0)) {
if (start) {
curp->line = lnn;
curp->reparse_count = 0;
rerun:
line_result = roff_parseln(curp->roff, curp->line, &ln, &of);
- switch (line_result) {
+ /* Process options. */
+
+ if (line_result & ROFF_APPEND)
+ assert(line_result == (ROFF_IGN | ROFF_APPEND));
+
+ if (line_result & ROFF_USERCALL)
+ assert((line_result & ROFF_MASK) == ROFF_REPARSE);
+
+ if (line_result & ROFF_USERRET) {
+ assert(line_result == (ROFF_IGN | ROFF_USERRET));
+ if (start == 0) {
+ /* Return from the current macro. */
+ result = ROFF_USERRET;
+ goto out;
+ }
+ }
+
+ switch (line_result & ROFF_LOOPMASK) {
+ case ROFF_IGN:
+ break;
+ case ROFF_WHILE:
+ if (curp->loop != NULL) {
+ if (loop == curp->loop)
+ break;
+ mandoc_msg(MANDOCERR_WHILE_NEST,
+ curp, curp->line, pos, NULL);
+ }
+ curp->loop = thisln;
+ loop = NULL;
+ inloop = 1;
+ break;
+ case ROFF_LOOPCONT:
+ case ROFF_LOOPEXIT:
+ if (curp->loop == NULL) {
+ mandoc_msg(MANDOCERR_WHILE_FAIL,
+ curp, curp->line, pos, NULL);
+ break;
+ }
+ if (inloop == 0) {
+ mandoc_msg(MANDOCERR_WHILE_INTO,
+ curp, curp->line, pos, NULL);
+ curp->loop = loop = NULL;
+ break;
+ }
+ if (line_result & ROFF_LOOPCONT)
+ loop = curp->loop;
+ else {
+ curp->loop = loop = NULL;
+ inloop = 0;
+ }
+ break;
+ default:
+ abort();
+ }
+
+ /* Process the main instruction from the roff parser. */
+
+ switch (line_result & ROFF_MASK) {
+ case ROFF_IGN:
+ break;
+ case ROFF_CONT:
+ if (curp->man->macroset == MACROSET_NONE)
+ choose_parser(curp);
+ if ((curp->man->macroset == MACROSET_MDOC ?
+ mdoc_parseln(curp->man, curp->line, ln.buf, of) :
+ man_parseln(curp->man, curp->line, ln.buf, of)
+ ) == 2)
+ goto out;
+ break;
+ case ROFF_RERUN:
+ goto rerun;
case ROFF_REPARSE:
- case ROFF_USERCALL:
if (++curp->reparse_count > REPARSE_LIMIT) {
+ /* Abort and return to the top level. */
result = ROFF_IGN;
mandoc_msg(MANDOCERR_ROFFLOOP, curp,
curp->line, pos, NULL);
- } else {
- result = mparse_buf_r(curp, ln, of, 0);
- if (line_result == ROFF_USERCALL) {
- if (result == ROFF_USERRET)
- result = ROFF_CONT;
- roff_userret(curp->roff);
- }
- if (start || result == ROFF_CONT) {
- pos = 0;
- continue;
- }
+ goto out;
}
- goto out;
- case ROFF_USERRET:
- if (start) {
- pos = 0;
- continue;
+ result = mparse_buf_r(curp, ln, of, 0);
+ if (line_result & ROFF_USERCALL) {
+ roff_userret(curp->roff);
+ /* Continue normally. */
+ if (result & ROFF_USERRET)
+ result = ROFF_CONT;
}
- result = ROFF_USERRET;
- goto out;
- case ROFF_APPEND:
- pos = strlen(ln.buf);
- continue;
- case ROFF_RERUN:
- goto rerun;
- case ROFF_IGN:
- pos = 0;
- continue;
+ if (start == 0 && result != ROFF_CONT)
+ goto out;
+ break;
case ROFF_SO:
if ( ! (curp->options & MPARSE_SO) &&
(i >= blk.sz || blk.buf[i] == '\0')) {
of = 0;
mparse_buf_r(curp, ln, of, 0);
}
- pos = 0;
- continue;
- default:
break;
+ default:
+ abort();
}
- if (curp->man->macroset == MACROSET_NONE)
- choose_parser(curp);
-
- if ((curp->man->macroset == MACROSET_MDOC ?
- mdoc_parseln(curp->man, curp->line, ln.buf, of) :
- man_parseln(curp->man, curp->line, ln.buf, of)) == 2)
- break;
-
- /* Temporary buffers typically are not full. */
-
- if (0 == start && '\0' == blk.buf[i])
- break;
-
/* Start the next input line. */
- pos = 0;
+ if (loop != NULL &&
+ (line_result & ROFF_LOOPMASK) == ROFF_IGN)
+ loop = loop->next;
+
+ if (loop != NULL) {
+ if ((line_result & ROFF_APPEND) == 0)
+ *ln.buf = '\0';
+ if (ln.sz < loop->sz)
+ resize_buf(&ln, loop->sz);
+ (void)strlcat(ln.buf, loop->buf, ln.sz);
+ of = 0;
+ goto rerun;
+ }
+
+ pos = (line_result & ROFF_APPEND) ? strlen(ln.buf) : 0;
}
out:
+ if (inloop) {
+ if (result != ROFF_USERRET)
+ mandoc_msg(MANDOCERR_WHILE_OUTOF, curp,
+ curp->line, pos, NULL);
+ curp->loop = NULL;
+ }
free(ln.buf);
if (firstln != curp->secondary)
free_buf_list(firstln);
git.ckatri.com / mandoc.git / blobdiff