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dtsparser.c
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dtsparser.c
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/*
* dtsparser.c - General purpose DTS parser
*
* Disects and emits DTS tokens
*
* (C) Copyright Pantelis Antoniou <[email protected]>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* (1) Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* (2) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* (3)The name of the author may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <limits.h>
#include <ctype.h>
#include <time.h>
#include <stdbool.h>
#include <stdarg.h>
#include <assert.h>
#include "utils.h"
#include "list.h"
#include "dtsparser.h"
static inline bool ispropnodec(char c)
{
return c == ',' || c == '.' || c == '_' || c == '+' || c == '*' ||
c == '#' || c == '?' || c == '@' || c == '-' || isalnum(c);
}
static inline bool ispathc(char c)
{
return c == '/' || ispropnodec(c);
}
static inline bool islabelc(char c, bool first)
{
return c == '_' || (first ? isalpha(c) : isalnum(c));
}
static inline bool ismacroc(char c, bool first)
{
return islabelc(c, first);
}
static inline bool state_with_comments(enum file_state fs)
{
return fs != s_slash && fs != s_slash_directive &&
fs != s_string && fs != s_item_char &&
fs != s_in_c_comment && fs != s_in_cpp_comment &&
fs != s_include_arg &&
fs != s_backslash && fs != s_backslash_space &&
fs != s_incbin_file;
}
static inline bool state_with_preproc(enum file_state fs)
{
return state_with_comments(fs) && fs != s_hash && fs != s_preproc;
}
static inline bool is_valid_final_state(enum file_state fs)
{
return fs == s_start || fs == s_headers || fs == s_nodes_and_properties;
}
static inline bool is_valid_preproc_state(enum file_state fs)
{
return fs == s_start || fs == s_headers || fs == s_nodes_and_properties;
}
static const char *states_txt[] = {
[s_start] = "start",
[s_headers] = "headers",
[s_memreserves] = "memreserves",
[s_slash] = "slash",
[s_in_c_comment] = "in_c_comment",
[s_in_cpp_comment] = "in_cpp_comment",
[s_preproc] = "preproc",
[s_hash] = "hash",
[s_backslash] = "backslash",
[s_backslash_space] = "backslash_space",
[s_nodes_and_properties] = "nodes_and_properties",
[s_nodes_and_properties_marker] = "nodes_and_properties_marker",
[s_node_ref] = "node_ref",
[s_node_pathref] = "node_pathref",
[s_refnode_start] = "refnode_start",
[s_semicolon] = "semicolon",
[s_property] = "property",
[s_string] = "string",
[s_string_ref] = "string_ref",
[s_slash_directive] = "slash_directive",
[s_property_bits] = "property_bits",
[s_array] = "array",
[s_byte] = "byte",
[s_item_ref] = "item_ref",
[s_item_expr] = "item_expr",
[s_item_char] = "item_char",
[s_item_int] = "item_int",
[s_item_macro] = "item_macro",
[s_item_macro_args] = "item_macro_args",
[s_item_pathref] = "item_pathref",
[s_include] = "include",
[s_include_arg] = "include_arg",
[s_node_del] = "node_del",
[s_node_del_ref] = "node_del_ref",
[s_node_del_pathref] = "node_del_pathref",
[s_node_del_name] = "node_del_name",
[s_prop_del] = "prop_del",
[s_prop_del_name] = "prop_del_name",
[s_prop_macro] = "prop_macro",
[s_prop_macro_args] = "prop_macro_args",
[s_incbin] = "incbin",
[s_incbin_arg] = "incbin_arg",
[s_incbin_file] = "incbin_file",
[s_incbin_file_comma] = "incbin_file_comma",
[s_incbin_offset] = "incbin_offset",
[s_incbin_offset_comma] = "incbin_offset_comma",
[s_incbin_size] = "incbin_size",
[s_incbin_end] = "incbin_end",
};
struct dts_emit_list_item {
struct list_head node;
struct dts_emit_item item;
char data[];
};
struct dts_property_list_item {
struct list_head node;
struct dts_property_item item;
};
static int (*states[])(struct dts_state *ds, char c);
static void reset_accumulator(struct dts_state *ds)
{
acc_reset(&ds->acc_body);
ds->acc_loc.filename = NULL;
}
static int accumulate(struct dts_state *ds, char c)
{
int ret;
if (acc_get_size(&ds->acc_body) == 0) {
ds->acc_loc.filename = ds->filename;
ds->acc_loc.start_index = ds->index;
ds->acc_loc.start_line = ds->line;
ds->acc_loc.start_col = ds->col;
}
ret = acc_add(&ds->acc_body, c);
if (ret) {
dts_error(ds, "out of memory\n");
return -1;
}
ds->acc_loc.end_index = ds->index;
ds->acc_loc.end_line = ds->line;
ds->acc_loc.end_col = ds->col;
return 0;
}
static const char *get_accumulator(struct dts_state *ds)
{
return acc_get(&ds->acc_body);
}
static int get_accumulator_size(struct dts_state *ds)
{
return acc_get_size(&ds->acc_body);
}
static void reset_comment_accumulator(struct dts_state *ds)
{
acc_reset(&ds->acc_comm);
ds->comm_loc.filename = NULL;
}
static int comment_accumulate(struct dts_state *ds, char c)
{
int ret;
if (acc_get_size(&ds->acc_comm) == 0) {
ds->comm_loc.filename = ds->filename;
ds->comm_loc.start_index = ds->index;
ds->comm_loc.start_line = ds->line;
ds->comm_loc.start_col = ds->col;
}
ret = acc_add(&ds->acc_comm, c);
if (ret) {
dts_error(ds, "out of memory\n");
return -1;
}
ds->comm_loc.end_index = ds->index;
ds->comm_loc.end_line = ds->line;
ds->comm_loc.end_col = ds->col;
return 0;
}
static const char *get_comment_accumulator(struct dts_state *ds)
{
return acc_get(&ds->acc_comm);
}
static int get_comment_accumulator_size(struct dts_state *ds)
{
return acc_get_size(&ds->acc_comm);
}
static void goto_state(struct dts_state *ds, enum file_state fs)
{
if (fs != ds->fs)
dts_debug(ds, "state change from %s -> %s\n",
states_txt[ds->fs],
states_txt[fs]);
ds->fs = fs;
}
static int handle_comment(struct dts_state *ds, char c)
{
if (c == '/') {
ds->pre_slash_fs = ds->fs;
goto_state(ds, s_slash);
return 1;
}
if (c == '\\') {
ds->pre_backslash_fs = ds->fs;
goto_state(ds, s_backslash);
return 1;
}
return 0;
}
static int handle_preproc(struct dts_state *ds, char c)
{
if (c != '#')
return 0;
if (get_accumulator_size(ds))
return 0;
/* preproc or property name starting with # */
ds->pre_preproc_fs = ds->fs;
goto_state(ds, s_hash);
reset_accumulator(ds);
accumulate(ds, '#');
return 1;
}
static int is_string_or_char_done(const char *buf, int len, char c, char termc)
{
char *tbuf = alloca(len + 1 + 1);
int elen;
elen = esc_strlen(buf);
if (c == termc && elen >= 0)
return 1;
strcpy(tbuf, buf);
tbuf[len] = c;
tbuf[len + 1] = '\0';
len++;
elen = esc_strlen(tbuf);
return (elen >= 0 || elen == -2) ? 0 : -1;
}
static struct dts_emit_list_item *
item_from_accumulator(struct dts_state *ds, enum dts_emit_atom atom)
{
char *p;
int data_size;
struct dts_emit_list_item *li;
const char *buf = get_accumulator(ds);
int len = get_accumulator_size(ds);
data_size = len + 1 + ds->filename_len + 1;
li = malloc(sizeof(*li) + data_size);
if (!li) {
dts_error(ds, "out of memory\n");
return NULL;
}
p = li->data;
li->item.atom = atom;
li->item.contents = p;
memcpy(p, buf, len);
p += len;
*p++ = '\0';
li->item.loc.filename = p;
memcpy(p, ds->filename, ds->filename_len);
p += ds->filename_len;
*p++ = '\0';
li->item.loc.start_index = ds->acc_loc.start_index;
li->item.loc.end_index = ds->acc_loc.end_index;
li->item.loc.start_line = ds->acc_loc.start_line;
li->item.loc.start_col = ds->acc_loc.start_col;
li->item.loc.end_line = ds->acc_loc.end_line;
li->item.loc.end_col = ds->acc_loc.end_col;
list_add_tail(&li->node, &ds->items);
return li;
}
static struct dts_emit_list_item *
item_from_comment_accumulator(struct dts_state *ds)
{
char *p;
int data_size;
struct dts_emit_list_item *li;
const char *buf = get_comment_accumulator(ds);
int len = get_comment_accumulator_size(ds);
data_size = len + 1 + ds->filename_len + 1;
li = malloc(sizeof(*li) + data_size);
if (!li) {
dts_error(ds, "out of memory\n");
return NULL;
}
p = li->data;
li->item.atom = dea_comment;
li->item.contents = p;
memcpy(p, buf, len);
p += len;
*p++ = '\0';
li->item.loc.filename = p;
strcpy(p, ds->filename);
memcpy(p, ds->filename, ds->filename_len);
p += ds->filename_len;
*p++ = '\0';
li->item.loc.start_index = ds->comm_loc.start_index;
li->item.loc.end_index = ds->comm_loc.end_index;
li->item.loc.start_line = ds->comm_loc.start_line;
li->item.loc.start_col = ds->comm_loc.start_col;
li->item.loc.end_line = ds->comm_loc.end_line;
li->item.loc.end_col = ds->comm_loc.end_col;
list_add_tail(&li->node, &ds->items);
return li;
}
static void reset_item_list(struct dts_state *ds)
{
struct dts_emit_list_item *li, *lin;
list_for_each_entry_safe(li, lin, &ds->items, node) {
list_del(&li->node);
free(li);
}
}
static int dts_generate_property_items(struct dts_state *ds,
struct list_head *lh)
{
struct dts_emit_list_item *li, *lit, *li_bits;
enum dts_emit_atom atom, end_atom;
int nr_elems, size;
bool found_end_atom;
struct dts_property_list_item *pli;
/* first count items */
li_bits = NULL;
list_for_each_entry(li, &ds->items, node) {
atom = li->item.atom;
/* skip comments completely */
if (atom == dea_comment)
continue;
if (atom == dea_bits) {
li_bits = li;
} else if (is_string_atom(atom) || atom == dea_expr) {
lit = li;
/* count string items and check */
nr_elems = 1;
/* macros can't be grouped */
if (atom != dea_expr) {
list_for_each_entry_continue(li, &ds->items, node) {
atom = li->item.atom;
if (atom == dea_comment)
continue;
if (!is_string_atom(atom))
break;
nr_elems++;
}
}
size = sizeof(*pli) +
sizeof(pli->item.elems[0]) * nr_elems;
pli = malloc(size);
if (!pli) {
dts_error(ds, "out of memory");
return -1;
}
pli->item.bits = NULL;
pli->item.nr_elems = nr_elems;
li = lit;
nr_elems = 0;
pli->item.elems[nr_elems++] = &li->item;
if (nr_elems < pli->item.nr_elems) {
list_for_each_entry_continue(li, &ds->items, node) {
atom = li->item.atom;
if (atom == dea_comment)
continue;
pli->item.elems[nr_elems++] = &li->item;
if (nr_elems >= pli->item.nr_elems)
break;
}
}
list_add_tail(&pli->node, lh);
li_bits = NULL;
} else if (is_seqstart_atom(atom)) {
end_atom = atom == dea_array_start ? dea_array_end : dea_bytestring_end;
found_end_atom = false;
nr_elems = 0;
lit = li;
/* count items and check */
list_for_each_entry_continue(li, &ds->items, node) {
atom = li->item.atom;
if (atom == dea_comment)
continue;
if (atom == end_atom) {
found_end_atom = true;
break;
}
/* valid item? */
if ((end_atom == dea_array_end &&
is_array_item_atom(atom)) ||
(end_atom == dea_bytestring_end &&
is_bytestring_item_atom(atom))) {
nr_elems++;
} else {
dts_error_at(ds, &li->item.loc,
"bad array item\n");
return -1;
}
}
if (!found_end_atom) {
dts_error(ds, "no property sequence end\n");
return -1;
}
/* allocate property item */
size = sizeof(*pli) +
sizeof(pli->item.elems[0]) * nr_elems;
pli = malloc(size);
if (!pli) {
dts_error(ds, "out of memory");
return -1;
}
pli->item.bits = li_bits ? &li_bits->item : NULL;
pli->item.nr_elems = nr_elems;
/* fill in now */
li = lit;
nr_elems = 0;
list_for_each_entry_continue(li, &ds->items, node) {
atom = li->item.atom;
if (atom == dea_comment)
continue;
if (atom == end_atom)
break;
pli->item.elems[nr_elems++] = &li->item;
}
list_add_tail(&pli->node, lh);
li_bits = NULL;
}
}
return 0;
}
static int dts_emit(struct dts_state *ds, enum dts_emit_type type)
{
struct dts_emit_list_item *li;
struct dts_property_list_item *pli, *plin;
struct dts_emit_data d;
int i, ret = 0, depth;
struct list_head pi_list;
depth = ds->depth;
if (!ds->refroot && ds->start_root && depth > 0)
depth--;
INIT_LIST_HEAD(&pi_list);
switch (type) {
case det_plugin:
/* TODO */
reset_item_list(ds);
return 0;
case det_del_node:
d.del_node = NULL;
list_for_each_entry(li, &ds->items, node) {
if (li->item.atom != dea_comment) {
d.del_node = &li->item;
break;
}
}
assert(d.del_node);
break;
case det_del_prop:
d.del_prop = NULL;
list_for_each_entry(li, &ds->items, node) {
if (li->item.atom != dea_comment) {
d.del_prop = &li->item;
break;
}
}
assert(d.del_prop);
break;
case det_include:
d.include = NULL;
list_for_each_entry(li, &ds->items, node) {
if (li->item.atom == dea_string) {
d.include = &li->item;
break;
}
}
assert(d.include);
break;
case det_comment:
d.comment = NULL;
if (!list_is_singular(&ds->items)) {
dts_error(ds, "bad comment emit\n");
return -1;
}
li = list_first_entry(&ds->items, typeof(*li), node);
d.comment = &li->item;
break;
case det_preproc:
d.preproc = NULL;
list_for_each_entry(li, &ds->items, node) {
if (li->item.atom == dea_string) {
d.preproc = &li->item;
break;
}
}
assert(d.preproc);
break;
case det_separator:
case det_node_empty:
case det_node_end:
break;
case det_memreserve:
d.memreserves[0] = NULL;
d.memreserves[1] = NULL;
i = 0;
list_for_each_entry(li, &ds->items, node) {
/* verify not more than two and is an int */
if (i >= 2 || li->item.atom != dea_int) {
dts_error_at(ds, &li->item.loc,
"bad /memreserve/\n");
return -1;
}
d.memreserves[i++] = &li->item;
}
break;
case det_node:
d.pn.name = NULL;
d.pn.nr_labels = 0;
d.pn.labels = NULL;
d.pn.nr_items = 0;
d.pn.items = NULL;
list_for_each_entry(li, &ds->items, node) {
switch (li->item.atom) {
case dea_comment:
break;
case dea_label:
d.pn.nr_labels++;
break;
case dea_ref:
case dea_name:
case dea_pathref:
/* impossible but verify */
assert(!d.pn.name);
d.pn.name = &li->item;
break;
default:
dts_error_at(ds, &li->item.loc,
"bad node item \"%s\" (%d)\n",
li->item.contents, li->item.atom);
return -1;
}
}
/* impossible to get here with this NULL, but check */
assert(d.pn.name);
if (d.pn.nr_labels) {
d.pn.labels = malloc(sizeof(d.pn.labels[0]) * d.pn.nr_labels);
if (!d.pn.labels) {
dts_error(ds, "out of memory");
ret = -1;
break;
}
i = 0;
list_for_each_entry(li, &ds->items, node) {
if (li->item.atom == dea_label)
d.pn.labels[i++] = &li->item;
}
}
break;
case det_incbin:
d.incbin.property = NULL;
d.incbin.filename = NULL;
d.incbin.offset = NULL;
d.incbin.size = NULL;
list_for_each_entry(li, &ds->items, node) {
if (li->item.atom == dea_name) {
d.incbin.property = &li->item;
} else if (li->item.atom == dea_string) {
d.incbin.filename = &li->item;
} else if (li->item.atom == dea_int) {
if (!d.incbin.offset)
d.incbin.offset = &li->item;
else if (!d.incbin.size)
d.incbin.size = &li->item;
}
}
assert(d.incbin.property);
assert(d.incbin.filename);
break;
case det_property:
d.pn.name = NULL;
d.pn.nr_labels = 0;
d.pn.labels = NULL;
d.pn.nr_items = 0;
d.pn.items = NULL;
list_for_each_entry(li, &ds->items, node) {
if (li->item.atom == dea_name) {
/* impossible but verify */
assert(!d.pn.name);
d.pn.name = &li->item;
}
}
assert(d.pn.name);
ret = dts_generate_property_items(ds, &pi_list);
if (ret)
break;
/* count items */
d.pn.nr_items = 0;
list_for_each_entry(pli, &pi_list, node)
d.pn.nr_items++;
if (d.pn.nr_items == 0)
break;
d.pn.items = malloc(sizeof(d.pn.items[0]) * d.pn.nr_items);
if (!d.pn.items) {
dts_error(ds, "out of memory");
ret = -1;
break;
}
i = 0;
list_for_each_entry(pli, &pi_list, node)
d.pn.items[i++] = &pli->item;
break;
}
if (!ret && ds->ops->emit)
ret = ds->ops->emit(ds, depth, type, &d);
if (type == det_property || type == det_node) {
list_for_each_entry_safe(pli, plin, &pi_list, node) {
list_del(&pli->node);
free(pli);
}
if (d.pn.items)
free(d.pn.items);
if (d.pn.labels)
free(d.pn.labels);
}
reset_item_list(ds);
return ret;
}
static int start(struct dts_state *ds, char c)
{
int ret;
if (isspace(c)) {
/* newline at start of line? it's meant to separate */
if (ds->col == 1 && c == '\n') {
ret = dts_emit(ds, det_separator);
if (ret)
return ret;
}
return 0;
}
/* it's a dtsi, no flags */
if (c == '/') {
ds->start_root = true;
accumulate(ds, c);
goto_state(ds, s_nodes_and_properties_marker);
return 0;
}
if (c == '&') {
ds->refroot = true;
goto_state(ds, s_node_ref);
return 0;
}
if (ispropnodec(c)) {
ds->start_root = false;
accumulate(ds, c);
goto_state(ds, s_nodes_and_properties);
return 0;
}
dts_error(ds, "File flags expected (but missing)\n");
return -1;
}
static int headers(struct dts_state *ds, char c)
{
int ret;
/* ignore ; */
if (c == ';')
return 0;
if (isspace(c)) {
/* newline at start of line? it's meant to separate */
if (ds->col == 1 && c == '\n') {
ret = dts_emit(ds, det_separator);
if (ret)
return ret;
}
return 0;
}
goto_state(ds, s_nodes_and_properties);
return states[ds->fs](ds, (char)c);
}
static int memreserves(struct dts_state *ds, char c)
{
const char *buf;
struct dts_emit_list_item *li;
int ret;
if (isspace(c) || c == ';') {
if (get_accumulator_size(ds) > 0) {
buf = get_accumulator(ds);
if (!get_accumulator_size(ds)) {
dts_error(ds, "bad memreserve item %s\n", buf);
return -1;
}
dts_debug(ds, "memreserve: %s\n", buf);
li = item_from_accumulator(ds, dea_int);
if (!li)
return -1;
reset_accumulator(ds);
}
if (c == ';') {
ret = dts_emit(ds, det_memreserve);
if (ret)
return ret;
goto_state(ds, s_headers);
}
return 0;
}
if (isxdigit(c) || ((c == 'x' || c == 'X') &&
!strcmp(get_accumulator(ds), "0"))) {
accumulate(ds, c);
return 0;
}
dts_error(ds, "Bad /memreserve/ character %c\n", c);
return -1;
}
static int slash(struct dts_state *ds, char c)
{
if (c == '/' || c == '*') {
comment_accumulate(ds, '/');
comment_accumulate(ds, c);
goto_state(ds, c == '/' ? s_in_cpp_comment : s_in_c_comment);
return 0;
}
accumulate(ds, '/');
switch (ds->pre_slash_fs) {
case s_start:
/* / encountered */
if (isspace(c)) {
ds->start_root = true;
goto_state(ds, s_nodes_and_properties);
break;
}
if (c == '{') {
ds->start_root = true;
goto_state(ds, s_nodes_and_properties_marker);
break;
}
if (!isalpha(c)) {
dts_error(ds, "expecting /dts-v1/ but missing\n");
return -1;
}
goto_state(ds, s_slash_directive);
break;
case s_headers:
if (isalpha(c))
goto_state(ds, s_slash_directive);
else if (isspace(c)) {
ds->start_root = true;
goto_state(ds, s_nodes_and_properties);
} else if (c == '{') {
ds->start_root = true;
goto_state(ds, s_nodes_and_properties_marker);
} else {
dts_error(ds, "bad headers '%c'\n", c);
return -1;
}
break;
case s_property:
if (!isalpha(c)) {
dts_error(ds, "expecting /bits/ directive\n");
return -1;
}
goto_state(ds, s_slash_directive);
break;
case s_nodes_and_properties:
/* not a directive, it's / again */
if (get_accumulator_size(ds) == 1 && isspace(c)) {
ds->start_root = true;
goto_state(ds, ds->pre_slash_fs);
break;
}
if (c == '{') {
ds->start_root = true;
goto_state(ds, s_nodes_and_properties_marker);
break;
}
if (!isalpha(c)) {
dts_error(ds, "bad slash directive\n");
return -1;
}
goto_state(ds, s_slash_directive);
break;
default:
goto_state(ds, ds->pre_slash_fs);
break;
}
/* and pass to old state */
return states[ds->fs](ds, (char)c);
}
static inline bool is_top_level_comment(struct dts_state *ds)
{
enum file_state fs = ds->pre_slash_fs;
return fs == s_headers || fs == s_start || fs == s_nodes_and_properties;
}
static int in_c_comment(struct dts_state *ds, char c)
{
const char *buf;
struct dts_emit_list_item *li;
int ret;
comment_accumulate(ds, c);
if (ds->last_c != '*' || c != '/')
return 0;
if (get_comment_accumulator_size(ds) < 4)
return 0;
buf = get_comment_accumulator(ds);
dts_debug(ds, "c comment: %s\n", buf);
li = item_from_comment_accumulator(ds);
if (!li)
return -1;
/* emit when we're a top level comment */
if (is_top_level_comment(ds)) {
ret = dts_emit(ds, det_comment);
if (ret)
return ret;
}
reset_comment_accumulator(ds);
goto_state(ds, ds->pre_slash_fs);
return 0;
}
static int in_cpp_comment(struct dts_state *ds, char c)
{
const char *buf;
struct dts_emit_list_item *li;
int ret;
if (c != '\n' || ds->last_c == '\\') {
comment_accumulate(ds, c);
return 0;
}
buf = get_comment_accumulator(ds);
dts_debug(ds, "c++ comment: %s\n", buf);
li = item_from_comment_accumulator(ds);
if (!li)
return -1;
/* emit when we're a top level comment */
if (is_top_level_comment(ds)) {
ret = dts_emit(ds, det_comment);
if (ret)
return ret;
}
reset_comment_accumulator(ds);
goto_state(ds, ds->pre_slash_fs);
return 0;
}
static int preproc(struct dts_state *ds, char c)
{
const char *buf;
struct dts_emit_list_item *li;
int ret;
if (c != '\n') {
accumulate(ds, c);
return 0;
}
buf = get_accumulator(ds);
if (is_valid_preproc_state(ds->pre_preproc_fs)) {
dts_debug(ds, "preproc directive: %s\n", buf);
li = item_from_accumulator(ds, dea_string);
if (!li)
return -1;
ret = dts_emit(ds, det_preproc);
if (ret)
return ret;
} else
dts_debug(ds, "suppressed preproc directive: %s\n", buf);
reset_accumulator(ds);
/* mark that we've found preprocessor directives so macros possible */
ds->found_preproc = true;