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#include <defs.h>
void
mcpu_pp_lexer_init( mcpu_pp_lexer_state *state )
{
if( state )
{
state->in_block_comment = 0;
state->options = NULL;
state->filename = NULL;
state->line_number = 0;
state->splice_offsets = NULL;
state->splice_count = 0;
}
}
void
mcpu_pp_lexer_set_diagnostics( mcpu_pp_lexer_state *state,
const mcpp_options *options,
const char *filename,
unsigned line_number,
const size_t *splice_offsets,
size_t splice_count )
{
if( state == NULL )
return;
state->options = options;
state->filename = filename;
state->line_number = line_number;
state->splice_offsets = splice_offsets;
state->splice_count = splice_count;
}
static unsigned
lexer_warning_line( const mcpu_pp_lexer_state *state, size_t offset )
{
size_t i;
unsigned line;
line = state->line_number;
for( i = 0; i < state->splice_count; ++i )
if( state->splice_offsets[i] <= offset )
++line;
return( line );
}
static int
lexer_has_splice_after( const mcpu_pp_lexer_state *state, size_t offset )
{
size_t i;
for( i = 0; i < state->splice_count; ++i )
if( state->splice_offsets[i] >= offset )
return( 1 );
return( 0 );
}
static int
lexer_comment_warning( const mcpu_pp_lexer_state *state, size_t offset,
const char *message )
{
if( state->options == NULL || !state->options->warn_comments )
return( 0 );
return( mcpp_diagnostic_warning(state->options,
state->filename,
lexer_warning_line(state, offset),
"%s", message) );
}
int
mcpu_pp_is_identifier_start( __mpu_char16_t c )
{
return( c == '_' || mpu_ucs2_is_xid_start(c) );
}
int
mcpu_pp_is_identifier_char( __mpu_char16_t c )
{
return( c == '_' || c == '$' || mpu_ucs2_is_xid_continue(c) );
}
static int
is_quote16( __mpu_char16_t c, enum mcpu_language language )
{
if( c == '"' || c == '`' )
return( 1 );
if( c == '\'' && language != MCPU_LANG_DIFF )
return( 1 );
return( 0 );
}
static int
append_space_once( mcpu_text *text )
{
if( text->length != 0 )
{
__mpu_char16_t last = text->data[text->length - 1];
if( last == ' ' || last == '\t' || last == '\f' || last == '\v' ||
last == '\r' || last == '\n' )
return( 0 );
}
return( mcpu_text_append_char(text, ' ') );
}
static int
is_blank16( __mpu_char16_t c )
{
return( c == ' ' || c == '\t' || c == '\f' ||
c == '\v' || c == '\r' );
}
static void
remove_comment_tail_space( mcpu_text *text )
{
size_t end;
int newline;
if( text == NULL || text->length == 0 )
return;
newline = text->data[text->length - 1] == '\n';
end = newline ? text->length - 1 : text->length;
while( end != 0 && is_blank16(text->data[end - 1]) )
--end;
if( newline )
text->data[end++] = '\n';
text->length = end;
text->data[text->length] = 0;
}
int
mcpu_pp_prepare_line( mcpu_pp_lexer_state *state,
const __mpu_char16_t *line,
size_t length,
enum mcpu_language language,
mcpu_text *prepared )
{
size_t p = 0;
__mpu_char16_t quote = 0;
int escaped = 0;
int first_token = 1;
int saw_hash = 0;
int reading_directive = 0;
int directive_done = 0;
int include_directive = 0;
int include_argument_pending = 0;
int in_include_angle = 0;
__mpu_char16_t directive[32];
size_t directive_length = 0;
int comment_tail;
if( state == NULL || line == NULL || prepared == NULL )
{
errno = EINVAL;
return( -1 );
}
mcpu_text_free( prepared );
mcpu_text_init( prepared );
comment_tail = state->in_block_comment;
while( p < length )
{
__mpu_char16_t c = line[p];
if( state->in_block_comment )
{
if( p + 1 < length && c == '/' && line[p + 1] == '*' )
{
if( lexer_comment_warning(state, p, "\"/*\" within comment") != 0 )
return( -1 );
}
if( p + 1 < length && c == '*' && line[p + 1] == '/' )
{
state->in_block_comment = 0;
p += 2;
}
else
{
if( c == '\n' && mcpu_text_append_char(prepared, c) != 0 )
return( -1 );
++p;
}
continue;
}
if( in_include_angle )
{
if( mcpu_text_append_char(prepared, c) != 0 )
return( -1 );
if( c == '>' || c == '\n' )
in_include_angle = 0;
++p;
continue;
}
if( quote )
{
if( mcpu_text_append_char(prepared, c) != 0 )
return( -1 );
if( escaped )
escaped = 0;
else if( c == '\\' )
escaped = 1;
else if( c == quote || c == '\n' )
quote = 0;
++p;
continue;
}
if( p + 1 < length && c == '/' && line[p + 1] == '*' )
{
if( append_space_once(prepared) != 0 )
return( -1 );
comment_tail = 1;
state->in_block_comment = 1;
p += 2;
continue;
}
if( p + 1 < length && c == '/' && line[p + 1] == '/' )
{
if( lexer_has_splice_after(state, p + 2) &&
lexer_comment_warning(state, p, "multi-line comment") != 0 )
return( -1 );
if( append_space_once(prepared) != 0 )
return( -1 );
comment_tail = 1;
while( p < length && line[p] != '\n' )
++p;
continue;
}
if( comment_tail && !is_blank16(c) && c != '\n' )
comment_tail = 0;
if( first_token )
{
if( c == ' ' || c == '\t' || c == '\f' || c == '\v' || c == '\r' )
{
if( mcpu_text_append_char(prepared, c) != 0 )
return( -1 );
++p;
continue;
}
first_token = 0;
if( c == '#' )
{
saw_hash = 1;
reading_directive = 1;
}
}
if( reading_directive && !directive_done && saw_hash && c != '#' )
{
if( directive_length == 0 &&
(c == ' ' || c == '\t' || c == '\f' || c == '\v' || c == '\r') )
{
if( mcpu_text_append_char(prepared, c) != 0 )
return( -1 );
++p;
continue;
}
if( mcpu_pp_is_identifier_char(c) )
{
if( directive_length + 1 < sizeof(directive) / sizeof(directive[0]) )
directive[directive_length++] = c;
if( mcpu_text_append_char(prepared, c) != 0 )
return( -1 );
++p;
continue;
}
directive_done = 1;
reading_directive = 0;
if( (directive_length == 7 &&
directive[0] == 'i' && directive[1] == 'n' &&
directive[2] == 'c' && directive[3] == 'l' &&
directive[4] == 'u' && directive[5] == 'd' &&
directive[6] == 'e') ||
(directive_length == 12 &&
directive[0] == 'i' && directive[1] == 'n' &&
directive[2] == 'c' && directive[3] == 'l' &&
directive[4] == 'u' && directive[5] == 'd' &&
directive[6] == 'e' && directive[7] == '_' &&
directive[8] == 'n' && directive[9] == 'e' &&
directive[10] == 'x' && directive[11] == 't') )
{
include_directive = 1;
include_argument_pending = 1;
}
}
if( include_directive && include_argument_pending )
{
if( c == ' ' || c == '\t' || c == '\f' || c == '\v' || c == '\r' )
{
if( mcpu_text_append_char(prepared, c) != 0 )
return( -1 );
++p;
continue;
}
include_argument_pending = 0;
if( c == '<' )
in_include_angle = 1;
}
if( is_quote16(c, language) )
quote = c;
if( mcpu_text_append_char(prepared, c) != 0 )
return( -1 );
++p;
}
if( comment_tail )
remove_comment_tail_space( prepared );
return( 0 );
}
int
mcpu_pp_find_directive( const __mpu_char16_t *line,
size_t length,
size_t *hash_offset )
{
size_t p = 0;
if( line == NULL || hash_offset == NULL )
{
errno = EINVAL;
return( -1 );
}
while( p < length )
{
if( line[p] == ' ' || line[p] == '\t' || line[p] == '\f' ||
line[p] == '\v' || line[p] == '\r' )
{
++p;
continue;
}
if( line[p] == '#' )
{
*hash_offset = p;
return( 1 );
}
break;
}
return( 0 );
}
|
