Optimize interactive input reader by allowing multiple input characters between redraws

darcs-hash:20051013140833-ac50b-f652fada56ca7359246b03a4bdf2116fb8c52435.gz

common.c

@@ -788,10 +788,6 @@ int writeb( tputs_arg_t b )
 
 void die_mem()
 {
-	/*
-	  int *foo=0;	
-	  *foo = 6;
-	  */	
 	debug( 0, L"Out of memory, shutting down fish." );
 	exit(1);
 }

fish_pager.c

@@ -38,8 +38,6 @@
 #include "input_common.h"
 #include "env_universal.h"
 
-#define WCHAR_END 0x80000000
-
 enum 
 {
 	LINE_UP = R_NULL+1,
@@ -857,6 +855,7 @@ static void init()
 	out_file = fdopen( out, "w" );
 	sb_init( &out_buff );
 
+	output_init();
 	env_universal_init( 0, 0, 0, 0);
 	input_common_init( &interrupt_handler );
 	
@@ -928,6 +927,7 @@ void destroy()
 {
 	env_universal_destroy();
 	input_common_destroy();
+	output_destroy();
 	del_curterm( cur_term );
 	sb_destroy( &out_buff );
 	fclose( out_file );

fish_tests.c

@@ -616,6 +616,7 @@ int main( int argc, char **argv )
 	say( L"Testing low-level functionality");
 	say( L"Lines beginning with '(ignore):' are not errors, they are warning messages\ngenerated by the fish parser library when given broken input, and can be\nignored. All actual errors begin with 'Error:'." );
 
+	output_init();	
 	event_init();	
 	exec_init();	
 	parser_init();
@@ -647,5 +648,6 @@ int main( int argc, char **argv )
 	wutil_destroy();
 	exec_destroy();
 	event_destroy();
+	output_destroy();
 	
 }

main.c

@@ -207,6 +207,7 @@ int main( int argc, char **argv )
 	if( force_interactive )
 		is_interactive_session=1;	
 
+	output_init();	
 	event_init();	
 	exec_init();	
 	parser_init();
@@ -303,6 +304,7 @@ int main( int argc, char **argv )
 	common_destroy();
 	exec_destroy();	
 	event_destroy();
+	output_destroy();
 	
 	
 	intern_free_all();

output.c

@@ -82,6 +82,19 @@ static int col_idx[]=
 }
 	;
 
+static size_t writestr_buff_sz=0;	
+static char *writestr_buff = 0;
+
+void output_init()
+{
+}
+
+void output_destroy()
+{
+	free( writestr_buff );
+}
+
+
 void set_color( int c, int c2 )
 {
 	static int last_color = FISH_COLOR_NORMAL, last_color2=FISH_COLOR_NORMAL;
@@ -245,8 +258,25 @@ int writech( wint_t ch )
 */
 void writestr( const wchar_t *str )
 {
-	while( *str != 0 )
+	while( *str )
-		writech( *(str++) );
+		writech( *str++ );
+/*	
+	size_t len = MAX_UTF8_BYTES*wcslen(str)+1;
+	
+	if( writestr_buff_sz < len )
+	{
+		writestr_buff = realloc( writestr_buff, writestr_buff_sz );
+		if( !writestr_buff )
+			die_mem();
+		writestr_buff_sz = len;
+	}
+	
+	wcstombs( writestr_buff, 
+			  str,
+			  writestr_buff_sz );
+
+	write( 1, writestr_buff, strlen( writestr_buff ) );	
+*/
 }
 
 

output.h

@@ -93,4 +93,8 @@ int writespace( int c );
 
 int output_color_code( const wchar_t *val );
 
+void output_init();
+
+void output_destroy();
+
 #endif

reader.c

@@ -7,7 +7,6 @@ syntax highlighting, tab-completion and various other interactive features.
 Internally the interactive mode functions rely in the functions of the
 input library to read individual characters of input.
 
-
 Token search is handled incrementally. Actual searches are only done
 on when searching backwards, since the previous results are saved. The
 last search position is remembered and a new search continues from the
@@ -32,6 +31,7 @@ commence.
 #include <sys/ioctl.h>
 #include <sys/time.h>
 #include <sys/wait.h>
+#include <sys/poll.h>
 #include <unistd.h>
 #include <wctype.h>
 
@@ -90,6 +90,14 @@ commence.
 */
 #define DEFAULT_TITLE L"echo $_ \" \"; pwd"
 
+/**
+   The maximum number of characters to read from the keyboard without
+   repainting. Note that this readahead wil only occur if new
+   characters are avaialble for reading, fish will never block for
+   more input without repainting.
+*/
+#define READAHEAD_MAX 256
+
 /**
    A struct describing the state of the interactive reader. These
    states can be stacked, in case reader_readline is called from
@@ -1012,10 +1020,44 @@ static int insert_char( int c )
    and print them to the screen using syntax highlighting, etc.
 */
 static int insert_str(wchar_t *str)
+{
+	int len = wcslen( str );
+	if( len < 4 )
 	{
 		while( (*str)!=0 )
 			if(!insert_char( *str++ ))
 				return 0;
+	}
+	else
+	{
+		
+		data->buff_len += len;
+		check_size();
+		
+		/* Insert space for extra character at the right position */
+		if( data->buff_pos < data->buff_len )
+		{
+			memmove( &data->buff[data->buff_pos+len],
+					 &data->buff[data->buff_pos],
+					 sizeof(wchar_t)*(data->buff_len-data->buff_pos) );
+		}
+		memmove( &data->buff[data->buff_pos], str, sizeof(wchar_t)*len );
+		data->buff_pos += len;
+		data->buff[data->buff_len]='\0';
+
+		/* Syntax highlight */
+		
+		reader_super_highlight_me_plenty( data->buff,
+										  data->new_color,
+										  data->buff_pos-1,
+										  0 );
+		memcpy( data->color, data->new_color, sizeof(int) * data->buff_len );
+		
+		/* repaint */
+
+		repaint();
+		
+	}
 	return 1;
 }
 
@@ -2383,6 +2425,20 @@ static int read_i()
 	return 0;
 }
 
+static int can_read( int fd )
+{
+	struct pollfd pfd = 
+	{
+		fd, POLLIN, 0 
+	}
+	;
+	switch( poll( &pfd, 1, 0 ) )
+	{
+		case 1:
+			return 1;
+	}
+	return 0;	
+}
 
 
 
@@ -2432,8 +2488,47 @@ wchar_t *reader_readline()
 		  (~) to digit)
 		*/
 		check_winch();
-		while( (c=input_readch()) == 0 )
+		while( 1 )
-			;
+		{
+			c=input_readch();
+			if( (c< WCHAR_END) && (c>31) && (c != 127) )
+			{
+				if( can_read(0) )
+				{
+
+					wchar_t arr[READAHEAD_MAX+1];
+					int i;
+					
+					memset( arr, 0, sizeof( arr ) );
+					arr[0] = c;
+					
+					for( i=1; i<READAHEAD_MAX; i++ )
+					{
+						
+						if( !can_read( 0 ) )
+						{
+							c = 0;
+							break;
+						}
+						c = input_readch();
+						if( (c< WCHAR_END) && (c>31) && (c != 127) )
+						{
+							arr[i]=c;
+							c=0;
+						}
+						else
+							break;
+					}
+					
+					insert_str( arr );
+					
+				}
+			}
+			
+			if( c != 0 )
+				break;
+		}
+
 
 		check_winch();
 		reader_check_status();
@@ -2447,6 +2542,9 @@ wchar_t *reader_readline()
 
 		if( last_char != R_YANK && last_char != R_YANK_POP )
 			yank=0;
+
+		
+
 		switch (c)
 		{
 
@@ -2789,9 +2887,9 @@ wchar_t *reader_readline()
 			default:
 			{
 				if( (c< WCHAR_END) && (c>31) && (c != 127) )
-				{
 					insert_char( c );
-				}
+				else
+					debug( 0, L"Unknown keybinding %d", c );
 				break;
 			}
 

wutil.c

@@ -416,21 +416,30 @@ static int vgwprintf( void (*writer)(wchar_t),
 						case 0:
 						{
 							unsigned d = va_arg( va, unsigned );
-							snprintf( str, 32, "%d", d );
+							if( precision >= 0 )
+								snprintf( str, 32, "%.*u", precision, d );
+							else
+								snprintf( str, 32, "%u", d );
 							break;
 						}
 						
 						case 1:
 						{
 							unsigned long d = va_arg( va, unsigned long );
-							snprintf( str, 32, "%ld", d );
+							if( precision >= 0 )
+								snprintf( str, 32, "%.*lu", precision, d );
+							else
+								snprintf( str, 32, "%lu", d );
 							break;
 						}
 						
 						case 2:
 						{
 							unsigned long long d = va_arg( va, unsigned long long );
-							snprintf( str, 32, "%lld", d );
+							if( precision >= 0 )
+								snprintf( str, 32, "%.*llu", precision, d );
+							else
+								snprintf( str, 32, "%llu", d );
 							break;
 						}