mirror of
https://github.com/fish-shell/fish-shell.git
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854 lines
16 KiB
C
854 lines
16 KiB
C
/** \file highlight.c
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Functions for syntax highlighting
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <wchar.h>
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#include <wctype.h>
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#include <termios.h>
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#include <signal.h>
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#include "config.h"
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#include "fallback.h"
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#include "util.h"
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#include "wutil.h"
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#include "highlight.h"
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#include "tokenizer.h"
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#include "proc.h"
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#include "parser.h"
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#include "parse_util.h"
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#include "builtin.h"
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#include "function.h"
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#include "env.h"
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#include "expand.h"
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#include "sanity.h"
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#include "common.h"
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#include "complete.h"
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#include "output.h"
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static void highlight_universal_internal( wchar_t * buff,
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int *color,
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int pos,
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array_list_t *error );
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/**
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The environment variables used to specify the color of different tokens.
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*/
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static wchar_t *highlight_var[] =
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{
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L"fish_color_normal",
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L"fish_color_command",
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L"fish_color_redirection",
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L"fish_color_end",
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L"fish_color_error",
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L"fish_color_param",
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L"fish_color_comment",
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L"fish_color_match",
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L"fish_color_search_match",
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L"fish_color_operator",
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L"fish_color_escape",
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L"fish_color_quote"
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}
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;
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#define VAR_COUNT ( sizeof(highlight_var)/sizeof(wchar_t *) )
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int highlight_get_color( int highlight )
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{
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if( highlight < 0 )
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return FISH_COLOR_NORMAL;
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if( highlight >= VAR_COUNT )
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return FISH_COLOR_NORMAL;
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wchar_t *val = env_get( highlight_var[highlight]);
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if( val == 0 )
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val = env_get( highlight_var[HIGHLIGHT_NORMAL]);
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if( val == 0 )
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{
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return FISH_COLOR_NORMAL;
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}
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return output_color_code( val );
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}
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/**
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Highligt operators (such as $, ~, %, as well as escaped characters.
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*/
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static void highlight_param( const wchar_t * buff,
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int *color,
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int pos,
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array_list_t *error )
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{
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int mode = 0;
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int in_pos, len = wcslen( buff );
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int bracket_count=0;
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wchar_t c;
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for( in_pos=0;
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in_pos<len;
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in_pos++ )
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{
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c = buff[in_pos];
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switch( mode )
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{
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/*
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Mode 0 means unquoted string
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*/
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case 0:
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{
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if( c == L'\\' )
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{
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int start_pos = in_pos;
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in_pos++;
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if( wcschr( L"~%", buff[in_pos] ) )
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{
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if( in_pos == 1 )
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{
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color[start_pos] = HIGHLIGHT_ESCAPE;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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}
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}
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else if( buff[in_pos]==L',' )
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{
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if( bracket_count )
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{
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color[start_pos] = HIGHLIGHT_ESCAPE;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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}
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}
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else if( wcschr( L"nrtbe*?$(){}'\"<>^ \\#;|&", buff[in_pos] ) )
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{
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color[start_pos]=HIGHLIGHT_ESCAPE;
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color[in_pos+1]=HIGHLIGHT_NORMAL;
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}
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else if( wcschr( L"uUxX01234567", buff[in_pos] ) )
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{
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int i;
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long long res=0;
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int chars=2;
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int base=16;
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int byte = 0;
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wchar_t max_val = ASCII_MAX;
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switch( buff[in_pos] )
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{
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case L'u':
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{
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chars=4;
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max_val = UCS2_MAX;
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break;
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}
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case L'U':
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{
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chars=8;
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max_val = WCHAR_MAX;
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break;
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}
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case L'x':
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{
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break;
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}
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case L'X':
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{
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byte=1;
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max_val = BYTE_MAX;
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break;
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}
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default:
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{
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base=8;
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chars=3;
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in_pos--;
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break;
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}
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}
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for( i=0; i<chars; i++ )
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{
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int d = convert_digit( buff[++in_pos],base);
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if( d < 0 )
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{
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in_pos--;
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break;
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}
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res=(res*base)|d;
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}
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if( (res <= max_val) )
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{
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color[start_pos] = HIGHLIGHT_ESCAPE;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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}
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else
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{
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color[start_pos] = HIGHLIGHT_ERROR;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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}
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}
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}
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else
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{
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switch( buff[in_pos]){
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case L'~':
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case L'%':
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{
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if( in_pos == 0 )
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{
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color[in_pos] = HIGHLIGHT_OPERATOR;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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}
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break;
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}
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case L'$':
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{
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wchar_t n = buff[in_pos+1];
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color[in_pos] = (n==L'$'||wcsvarchr(n))? HIGHLIGHT_OPERATOR:HIGHLIGHT_ERROR;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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break;
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}
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case L'*':
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case L'?':
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case L'(':
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case L')':
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{
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color[in_pos] = HIGHLIGHT_OPERATOR;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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break;
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}
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case L'{':
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{
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color[in_pos] = HIGHLIGHT_OPERATOR;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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bracket_count++;
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break;
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}
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case L'}':
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{
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color[in_pos] = HIGHLIGHT_OPERATOR;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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bracket_count--;
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break;
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}
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case L',':
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{
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if( bracket_count )
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{
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color[in_pos] = HIGHLIGHT_OPERATOR;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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}
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break;
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}
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case L'\'':
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{
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color[in_pos] = HIGHLIGHT_QUOTE;
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mode = 1;
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break;
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}
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case L'\"':
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{
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color[in_pos] = HIGHLIGHT_QUOTE;
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mode = 2;
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break;
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}
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}
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}
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break;
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}
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/*
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Mode 1 means single quoted string, i.e 'foo'
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*/
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case 1:
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{
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if( c == L'\\' )
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{
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int start_pos = in_pos;
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switch( buff[++in_pos] )
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{
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case '\\':
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case L'\'':
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{
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color[start_pos] = HIGHLIGHT_ESCAPE;
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color[in_pos+1] = HIGHLIGHT_QUOTE;
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break;
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}
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case 0:
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{
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return;
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}
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}
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}
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if( c == L'\'' )
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{
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mode = 0;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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}
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break;
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}
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/*
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Mode 2 means double quoted string, i.e. "foo"
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*/
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case 2:
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{
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switch( c )
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{
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case '"':
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{
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mode = 0;
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color[in_pos+1] = HIGHLIGHT_NORMAL;
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break;
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}
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case '\\':
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{
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int start_pos = in_pos;
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switch( buff[++in_pos] )
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{
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case L'\0':
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{
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return;
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}
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case '\\':
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case L'$':
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case '"':
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{
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color[start_pos] = HIGHLIGHT_ESCAPE;
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color[in_pos+1] = HIGHLIGHT_QUOTE;
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break;
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}
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}
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break;
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}
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case '$':
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{
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wchar_t n = buff[in_pos+1];
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color[in_pos] = (n==L'$'||wcsvarchr(n))? HIGHLIGHT_OPERATOR:HIGHLIGHT_ERROR;
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color[in_pos+1] = HIGHLIGHT_QUOTE;
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break;
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}
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}
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break;
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}
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}
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}
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}
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void highlight_shell( wchar_t * buff,
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int *color,
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int pos,
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array_list_t *error )
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{
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tokenizer tok;
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int had_cmd=0;
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int i;
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int last_val;
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wchar_t *last_cmd=0;
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int len = wcslen(buff);
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if( !len )
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return;
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for( i=0; buff[i] != 0; i++ )
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color[i] = -1;
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for( tok_init( &tok, buff, TOK_SHOW_COMMENTS );
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tok_has_next( &tok );
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tok_next( &tok ) )
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{
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int last_type = tok_last_type( &tok );
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int prev_argc=0;
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switch( last_type )
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{
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case TOK_STRING:
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{
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if( had_cmd )
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{
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/*Parameter */
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wchar_t *param = tok_last( &tok );
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if( param[0] == L'-' )
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{
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if( complete_is_valid_option( last_cmd, param, error ))
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_PARAM;
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else
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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}
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else
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_PARAM;
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}
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highlight_param( param,
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&color[tok_get_pos( &tok )],
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pos-tok_get_pos( &tok ),
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error );
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}
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else
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{
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prev_argc=0;
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/*
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Command. First check that the command actually exists.
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*/
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wchar_t *cmd = expand_one( 0,
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wcsdup(tok_last( &tok )),
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EXPAND_SKIP_SUBSHELL | EXPAND_SKIP_VARIABLES);
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if( cmd == 0 )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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}
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else
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{
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int is_cmd = 0;
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int is_subcommand = 0;
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int mark = tok_get_pos( &tok );
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_COMMAND;
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if( parser_is_subcommand( cmd ) )
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{
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tok_next( &tok );
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if(( wcscmp( L"-h", tok_last( &tok ) ) == 0 ) ||
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( wcscmp( L"--help", tok_last( &tok ) ) == 0 ) )
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{
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/*
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The builtin and command builtins
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are normally followed by another
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command, but if they are invoked
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with the -h option, their help text
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is displayed instead
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*/
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}
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else
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{
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is_subcommand = 1;
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}
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tok_set_pos( &tok, mark );
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}
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if( !is_subcommand )
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{
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wchar_t *tmp;
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/*
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OK, this is a command, it has been
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successfully expanded and everything
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looks ok. Lets check if the command
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exists.
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*/
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/*
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First check if it is a builtin or
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function, since we don't have to stat
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any files for that
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*/
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is_cmd |= builtin_exists( cmd );
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is_cmd |= function_exists( cmd );
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/*
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Moving on to expensive tests
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*/
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/*
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Check if this is a regular command
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*/
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is_cmd |= !!(tmp=get_filename( cmd ));
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free(tmp);
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/*
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Could not find the command. Maybe it is
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a path for a implicit cd command.
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*/
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is_cmd |= !!(tmp=parser_cdpath_get( cmd ));
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free( tmp );
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if( is_cmd )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_COMMAND;
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}
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else
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{
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if( error )
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al_push( error, wcsdupcat2 ( L"Unknown command \'", cmd, L"\'", 0 ));
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color[ tok_get_pos( &tok ) ] = (HIGHLIGHT_ERROR);
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}
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had_cmd = 1;
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}
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free(cmd);
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if( had_cmd )
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{
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if( last_cmd )
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free( last_cmd );
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last_cmd = wcsdup( tok_last( &tok ) );
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}
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}
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}
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break;
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}
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case TOK_REDIRECT_OUT:
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case TOK_REDIRECT_IN:
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case TOK_REDIRECT_APPEND:
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case TOK_REDIRECT_FD:
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{
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if( !had_cmd )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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if( error )
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al_push( error, wcsdup ( L"Redirection without a command" ) );
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break;
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}
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wchar_t *target=0;
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_REDIRECTION;
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tok_next( &tok );
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/*
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Check that we are redirecting into a file
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*/
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switch( tok_last_type( &tok ) )
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{
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case TOK_STRING:
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{
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target = expand_one( 0, wcsdup( tok_last( &tok ) ), EXPAND_SKIP_SUBSHELL);
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/*
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Redirect filename may contain a subshell.
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If so, it will be ignored/not flagged.
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*/
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}
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break;
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default:
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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if( error )
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al_push( error, wcsdup ( L"Invalid redirection" ) );
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}
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}
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if( target != 0 )
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{
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wchar_t *dir = wcsdup( target );
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wchar_t *dir_end = wcsrchr( dir, L'/' );
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struct stat buff;
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/*
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If file is in directory other than '.', check
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that the directory exists.
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*/
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if( dir_end != 0 )
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{
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*dir_end = 0;
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if( wstat( dir, &buff ) == -1 )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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if( error )
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al_push( error, wcsdupcat2( L"Directory \'", dir, L"\' does not exist", 0 ) );
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}
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}
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free( dir );
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/*
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If the file is read from or appended to, check
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if it exists.
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*/
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if( last_type == TOK_REDIRECT_IN ||
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last_type == TOK_REDIRECT_APPEND )
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{
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if( wstat( target, &buff ) == -1 )
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{
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color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
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if( error )
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al_push( error, wcsdupcat2( L"File \'", target, L"\' does not exist", 0 ) );
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}
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}
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free( target );
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}
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break;
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}
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case TOK_PIPE:
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case TOK_BACKGROUND:
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{
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if( had_cmd )
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{
|
|
color[ tok_get_pos( &tok ) ] = HIGHLIGHT_END;
|
|
had_cmd = 0;
|
|
}
|
|
else
|
|
{
|
|
color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
|
|
if( error )
|
|
al_push( error, wcsdup ( L"No job to put in background" ) );
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case TOK_END:
|
|
{
|
|
color[ tok_get_pos( &tok ) ] = HIGHLIGHT_END;
|
|
had_cmd = 0;
|
|
break;
|
|
}
|
|
|
|
case TOK_COMMENT:
|
|
{
|
|
color[ tok_get_pos( &tok ) ] = HIGHLIGHT_COMMENT;
|
|
break;
|
|
}
|
|
|
|
case TOK_ERROR:
|
|
default:
|
|
{
|
|
/*
|
|
If the tokenizer reports an error, highlight it as such.
|
|
*/
|
|
if( error )
|
|
al_push( error, wcsdup ( tok_last( &tok) ) );
|
|
color[ tok_get_pos( &tok ) ] = HIGHLIGHT_ERROR;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if( last_cmd )
|
|
free( last_cmd );
|
|
|
|
tok_destroy( &tok );
|
|
|
|
/*
|
|
Locate and syntax highlight subshells recursively
|
|
*/
|
|
|
|
wchar_t *buffcpy = wcsdup( buff );
|
|
wchar_t *subpos=buffcpy;
|
|
int done=0;
|
|
|
|
while( 1 )
|
|
{
|
|
wchar_t *begin, *end;
|
|
|
|
if( parse_util_locate_cmdsubst( subpos,
|
|
(const wchar_t **)&begin,
|
|
(const wchar_t **)&end,
|
|
1) <= 0)
|
|
{
|
|
break;
|
|
}
|
|
|
|
if( !*end )
|
|
done=1;
|
|
else
|
|
*end=0;
|
|
|
|
highlight_shell( begin+1, color +(begin-buffcpy)+1, -1, error );
|
|
color[end-buffcpy]=HIGHLIGHT_OPERATOR;
|
|
|
|
if( done )
|
|
break;
|
|
|
|
subpos = end+1;
|
|
|
|
}
|
|
free( buffcpy);
|
|
|
|
|
|
last_val=0;
|
|
for( i=0; buff[i] != 0; i++ )
|
|
{
|
|
if( color[i] >= 0 )
|
|
last_val = color[i];
|
|
else
|
|
color[i] = last_val;
|
|
}
|
|
|
|
|
|
highlight_universal_internal( buff, color, pos, error );
|
|
|
|
/*
|
|
Spaces should not be highlighted at all, since it makes cursor look funky in some terminals
|
|
*/
|
|
for( i=0; buff[i]; i++ )
|
|
{
|
|
if( iswspace(buff[i]) )
|
|
{
|
|
color[i]=0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
Perform quote and parenthesis highlighting on the specified string.
|
|
*/
|
|
static void highlight_universal_internal( wchar_t * buff,
|
|
int *color,
|
|
int pos,
|
|
array_list_t *error )
|
|
{
|
|
|
|
if( (pos >= 0) && (pos < wcslen(buff)) )
|
|
{
|
|
|
|
/*
|
|
Highlight matching quotes
|
|
*/
|
|
if( (buff[pos] == L'\'') || (buff[pos] == L'\"') )
|
|
{
|
|
|
|
array_list_t l;
|
|
al_init( &l );
|
|
|
|
int level=0;
|
|
wchar_t prev_q=0;
|
|
|
|
wchar_t *str=buff;
|
|
|
|
int match_found=0;
|
|
|
|
while(*str)
|
|
{
|
|
switch( *str )
|
|
{
|
|
case L'\\':
|
|
str++;
|
|
break;
|
|
case L'\"':
|
|
case L'\'':
|
|
if( level == 0 )
|
|
{
|
|
level++;
|
|
al_push( &l, (void *)(str-buff) );
|
|
prev_q = *str;
|
|
}
|
|
else
|
|
{
|
|
if( prev_q == *str )
|
|
{
|
|
long pos1, pos2;
|
|
|
|
level--;
|
|
pos1 = (long)al_pop( &l );
|
|
pos2 = str-buff;
|
|
if( pos1==pos || pos2==pos )
|
|
{
|
|
color[pos1]|=HIGHLIGHT_MATCH<<8;
|
|
color[pos2]|=HIGHLIGHT_MATCH<<8;
|
|
match_found = 1;
|
|
|
|
}
|
|
prev_q = *str==L'\"'?L'\'':L'\"';
|
|
}
|
|
else
|
|
{
|
|
level++;
|
|
al_push( &l, (void *)(str-buff) );
|
|
prev_q = *str;
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
if( (*str == L'\0'))
|
|
break;
|
|
|
|
str++;
|
|
}
|
|
|
|
al_destroy( &l );
|
|
|
|
if( !match_found )
|
|
color[pos] = HIGHLIGHT_ERROR<<8;
|
|
}
|
|
|
|
/*
|
|
Highlight matching parenthesis
|
|
*/
|
|
if( wcschr( L"()[]{}", buff[pos] ) )
|
|
{
|
|
int step = wcschr(L"({[", buff[pos])?1:-1;
|
|
wchar_t dec_char = *(wcschr( L"()[]{}", buff[pos] ) + step);
|
|
wchar_t inc_char = buff[pos];
|
|
int level = 0;
|
|
wchar_t *str = &buff[pos];
|
|
int match_found=0;
|
|
|
|
while( (str >= buff) && *str)
|
|
{
|
|
if( *str == inc_char )
|
|
level++;
|
|
if( *str == dec_char )
|
|
level--;
|
|
if( level == 0 )
|
|
{
|
|
int pos2 = str-buff;
|
|
color[pos]|=HIGHLIGHT_MATCH<<8;
|
|
color[pos2]|=HIGHLIGHT_MATCH<<8;
|
|
match_found=1;
|
|
break;
|
|
}
|
|
str+= step;
|
|
}
|
|
|
|
if( !match_found )
|
|
color[pos] = HIGHLIGHT_ERROR<<8;
|
|
}
|
|
}
|
|
}
|
|
|
|
void highlight_universal( wchar_t * buff,
|
|
int *color,
|
|
int pos,
|
|
array_list_t *error )
|
|
{
|
|
int i;
|
|
|
|
for( i=0; buff[i]; i++ )
|
|
color[i] = 0;
|
|
|
|
highlight_universal_internal( buff, color, pos, error );
|
|
}
|