mirror of
https://github.com/fish-shell/fish-shell.git
synced 2024-11-23 13:33:02 +08:00
698 lines
9.9 KiB
C++
698 lines
9.9 KiB
C++
/** \file parse_util.c
|
|
|
|
Various mostly unrelated utility functions related to parsing,
|
|
loading and evaluating fish code.
|
|
|
|
This library can be seen as a 'toolbox' for functions that are
|
|
used in many places in fish and that are somehow related to
|
|
parsing the code.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <wctype.h>
|
|
|
|
#include <wchar.h>
|
|
#include <map>
|
|
#include <set>
|
|
#include <algorithm>
|
|
|
|
#include <time.h>
|
|
#include <assert.h>
|
|
|
|
#include "fallback.h"
|
|
#include "util.h"
|
|
|
|
#include "wutil.h"
|
|
#include "common.h"
|
|
#include "tokenizer.h"
|
|
#include "parse_util.h"
|
|
#include "expand.h"
|
|
#include "intern.h"
|
|
#include "exec.h"
|
|
#include "env.h"
|
|
#include "signal.h"
|
|
#include "wildcard.h"
|
|
|
|
/**
|
|
Maximum number of autoloaded items opf a specific type to keep in
|
|
memory at a time.
|
|
*/
|
|
#define AUTOLOAD_MAX 10
|
|
|
|
/**
|
|
Minimum time, in seconds, before an autoloaded item will be
|
|
unloaded
|
|
*/
|
|
#define AUTOLOAD_MIN_AGE 60
|
|
|
|
|
|
int parse_util_lineno( const wchar_t *str, int len )
|
|
{
|
|
/**
|
|
First cached state
|
|
*/
|
|
static wchar_t *prev_str = 0;
|
|
static int i=0;
|
|
static int res = 1;
|
|
|
|
/**
|
|
Second cached state
|
|
*/
|
|
static wchar_t *prev_str2 = 0;
|
|
static int i2 = 0;
|
|
static int res2 = 1;
|
|
|
|
CHECK( str, 0 );
|
|
|
|
if( str != prev_str || i>len )
|
|
{
|
|
if( prev_str2 == str && i2 <= len )
|
|
{
|
|
wchar_t *tmp_str = prev_str;
|
|
int tmp_i = i;
|
|
int tmp_res = res;
|
|
prev_str = prev_str2;
|
|
i=i2;
|
|
res=res2;
|
|
|
|
prev_str2 = tmp_str;
|
|
i2 = tmp_i;
|
|
res2 = tmp_res;
|
|
}
|
|
else
|
|
{
|
|
prev_str2 = prev_str;
|
|
i2 = i;
|
|
res2=res;
|
|
|
|
prev_str = (wchar_t *)str;
|
|
i=0;
|
|
res=1;
|
|
}
|
|
}
|
|
|
|
for( ; str[i] && i<len; i++ )
|
|
{
|
|
if( str[i] == L'\n' )
|
|
{
|
|
res++;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
int parse_util_get_line_from_offset( const wcstring &str, int pos )
|
|
{
|
|
// return parse_util_lineno( buff, pos );
|
|
const wchar_t *buff = str.c_str();
|
|
int i;
|
|
int count = 0;
|
|
if( pos < 0 )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
for( i=0; i<pos; i++ )
|
|
{
|
|
if( !buff[i] )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if( buff[i] == L'\n' )
|
|
{
|
|
count++;
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
|
|
|
|
int parse_util_get_offset_from_line( const wcstring &str, int line )
|
|
{
|
|
const wchar_t *buff = str.c_str();
|
|
int i;
|
|
int count = 0;
|
|
|
|
if( line < 0 )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if( line == 0 )
|
|
return 0;
|
|
|
|
for( i=0;; i++ )
|
|
{
|
|
if( !buff[i] )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if( buff[i] == L'\n' )
|
|
{
|
|
count++;
|
|
if( count == line )
|
|
{
|
|
return i+1;
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
int parse_util_get_offset( const wcstring &str, int line, int line_offset )
|
|
{
|
|
const wchar_t *buff = str.c_str();
|
|
int off = parse_util_get_offset_from_line( buff, line );
|
|
int off2 = parse_util_get_offset_from_line( buff, line+1 );
|
|
int line_offset2 = line_offset;
|
|
|
|
if( off < 0 )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if( off2 < 0 )
|
|
{
|
|
off2 = wcslen( buff )+1;
|
|
}
|
|
|
|
if( line_offset2 < 0 )
|
|
{
|
|
line_offset2 = 0;
|
|
}
|
|
|
|
if( line_offset2 >= off2-off-1 )
|
|
{
|
|
line_offset2 = off2-off-1;
|
|
}
|
|
|
|
return off + line_offset2;
|
|
|
|
}
|
|
|
|
|
|
int parse_util_locate_cmdsubst( const wchar_t *in,
|
|
wchar_t **begin,
|
|
wchar_t **end,
|
|
int allow_incomplete )
|
|
{
|
|
wchar_t *pos;
|
|
wchar_t prev=0;
|
|
int syntax_error=0;
|
|
int paran_count=0;
|
|
|
|
wchar_t *paran_begin=0, *paran_end=0;
|
|
|
|
CHECK( in, 0 );
|
|
|
|
for( pos = (wchar_t *)in; *pos; pos++ )
|
|
{
|
|
if( prev != '\\' )
|
|
{
|
|
if( wcschr( L"\'\"", *pos ) )
|
|
{
|
|
wchar_t *q_end = quote_end( pos );
|
|
if( q_end && *q_end)
|
|
{
|
|
pos=q_end;
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if( *pos == '(' )
|
|
{
|
|
if(( paran_count == 0)&&(paran_begin==0))
|
|
{
|
|
paran_begin = pos;
|
|
}
|
|
|
|
paran_count++;
|
|
}
|
|
else if( *pos == ')' )
|
|
{
|
|
|
|
paran_count--;
|
|
|
|
if( (paran_count == 0) && (paran_end == 0) )
|
|
{
|
|
paran_end = pos;
|
|
break;
|
|
}
|
|
|
|
if( paran_count < 0 )
|
|
{
|
|
syntax_error = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
prev = *pos;
|
|
}
|
|
|
|
syntax_error |= (paran_count < 0 );
|
|
syntax_error |= ((paran_count>0)&&(!allow_incomplete));
|
|
|
|
if( syntax_error )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if( paran_begin == 0 )
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
if( begin )
|
|
{
|
|
*begin = paran_begin;
|
|
}
|
|
|
|
if( end )
|
|
{
|
|
*end = paran_count?(wchar_t *)in+wcslen(in):paran_end;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
void parse_util_cmdsubst_extent( const wchar_t *buff,
|
|
int cursor_pos,
|
|
const wchar_t **a,
|
|
const wchar_t **b )
|
|
{
|
|
wchar_t *begin, *end;
|
|
wchar_t *pos;
|
|
const wchar_t *cursor = buff + cursor_pos;
|
|
|
|
CHECK( buff, );
|
|
|
|
if( a )
|
|
{
|
|
*a = (wchar_t *)buff;
|
|
}
|
|
|
|
if( b )
|
|
{
|
|
*b = (wchar_t *)buff+wcslen(buff);
|
|
}
|
|
|
|
pos = (wchar_t *)buff;
|
|
|
|
while( 1 )
|
|
{
|
|
if( parse_util_locate_cmdsubst( pos,
|
|
&begin,
|
|
&end,
|
|
1 ) <= 0)
|
|
{
|
|
/*
|
|
No subshell found
|
|
*/
|
|
break;
|
|
}
|
|
|
|
if( !end )
|
|
{
|
|
end = (wchar_t *)buff + wcslen(buff);
|
|
}
|
|
|
|
if(( begin < cursor ) && (end >= cursor) )
|
|
{
|
|
begin++;
|
|
|
|
if( a )
|
|
{
|
|
*a = begin;
|
|
}
|
|
|
|
if( b )
|
|
{
|
|
*b = end;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if( !*end )
|
|
{
|
|
break;
|
|
}
|
|
|
|
pos = end+1;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
Get the beginning and end of the job or process definition under the cursor
|
|
*/
|
|
static void job_or_process_extent( const wchar_t *buff,
|
|
int cursor_pos,
|
|
const wchar_t **a,
|
|
const wchar_t **b,
|
|
int process )
|
|
{
|
|
const wchar_t *begin, *end;
|
|
int pos;
|
|
wchar_t *buffcpy;
|
|
int finished=0;
|
|
|
|
tokenizer tok;
|
|
|
|
CHECK( buff, );
|
|
|
|
if( a )
|
|
{
|
|
*a=0;
|
|
}
|
|
|
|
if( b )
|
|
{
|
|
*b = 0;
|
|
}
|
|
|
|
parse_util_cmdsubst_extent( buff, cursor_pos, &begin, &end );
|
|
if( !end || !begin )
|
|
{
|
|
return;
|
|
}
|
|
|
|
pos = cursor_pos - (begin - buff);
|
|
|
|
if( a )
|
|
{
|
|
*a = begin;
|
|
}
|
|
|
|
if( b )
|
|
{
|
|
*b = end;
|
|
}
|
|
|
|
buffcpy = wcsndup( begin, end-begin );
|
|
|
|
if( !buffcpy )
|
|
{
|
|
DIE_MEM();
|
|
}
|
|
|
|
for( tok_init( &tok, buffcpy, TOK_ACCEPT_UNFINISHED );
|
|
tok_has_next( &tok ) && !finished;
|
|
tok_next( &tok ) )
|
|
{
|
|
int tok_begin = tok_get_pos( &tok );
|
|
|
|
switch( tok_last_type( &tok ) )
|
|
{
|
|
case TOK_PIPE:
|
|
{
|
|
if( !process )
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
case TOK_END:
|
|
case TOK_BACKGROUND:
|
|
{
|
|
|
|
if( tok_begin >= pos )
|
|
{
|
|
finished=1;
|
|
if( b )
|
|
{
|
|
*b = (wchar_t *)buff + tok_begin;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if( a )
|
|
{
|
|
*a = (wchar_t *)buff + tok_begin+1;
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
free( buffcpy);
|
|
|
|
tok_destroy( &tok );
|
|
|
|
}
|
|
|
|
void parse_util_process_extent( const wchar_t *buff,
|
|
int pos,
|
|
const wchar_t **a,
|
|
const wchar_t **b )
|
|
{
|
|
job_or_process_extent( buff, pos, a, b, 1 );
|
|
}
|
|
|
|
void parse_util_job_extent( const wchar_t *buff,
|
|
int pos,
|
|
const wchar_t **a,
|
|
const wchar_t **b )
|
|
{
|
|
job_or_process_extent( buff,pos,a, b, 0 );
|
|
}
|
|
|
|
|
|
void parse_util_token_extent( const wchar_t *buff,
|
|
int cursor_pos,
|
|
const wchar_t **tok_begin,
|
|
const wchar_t **tok_end,
|
|
const wchar_t **prev_begin,
|
|
const wchar_t **prev_end )
|
|
{
|
|
const wchar_t *begin, *end;
|
|
int pos;
|
|
wchar_t *buffcpy;
|
|
|
|
tokenizer tok;
|
|
|
|
const wchar_t *a, *b, *pa, *pb;
|
|
|
|
CHECK( buff, );
|
|
|
|
assert( cursor_pos >= 0 );
|
|
|
|
a = b = pa = pb = 0;
|
|
|
|
parse_util_cmdsubst_extent( buff, cursor_pos, &begin, &end );
|
|
|
|
if( !end || !begin )
|
|
{
|
|
return;
|
|
}
|
|
|
|
pos = cursor_pos - (begin - buff);
|
|
|
|
a = buff + pos;
|
|
b = a;
|
|
pa = buff + pos;
|
|
pb = pa;
|
|
|
|
assert( begin >= buff );
|
|
assert( begin <= (buff+wcslen(buff) ) );
|
|
assert( end >= begin );
|
|
assert( end <= (buff+wcslen(buff) ) );
|
|
|
|
buffcpy = wcsndup( begin, end-begin );
|
|
|
|
if( !buffcpy )
|
|
{
|
|
DIE_MEM();
|
|
}
|
|
|
|
for( tok_init( &tok, buffcpy, TOK_ACCEPT_UNFINISHED | TOK_SQUASH_ERRORS );
|
|
tok_has_next( &tok );
|
|
tok_next( &tok ) )
|
|
{
|
|
int tok_begin = tok_get_pos( &tok );
|
|
int tok_end=tok_begin;
|
|
|
|
/*
|
|
Calculate end of token
|
|
*/
|
|
if( tok_last_type( &tok ) == TOK_STRING )
|
|
{
|
|
tok_end +=wcslen(tok_last(&tok));
|
|
}
|
|
|
|
/*
|
|
Cursor was before beginning of this token, means that the
|
|
cursor is between two tokens, so we set it to a zero element
|
|
string and break
|
|
*/
|
|
if( tok_begin > pos )
|
|
{
|
|
a = b = (wchar_t *)buff + pos;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
If cursor is inside the token, this is the token we are
|
|
looking for. If so, set a and b and break
|
|
*/
|
|
if( (tok_last_type( &tok ) == TOK_STRING) && (tok_end >= pos ) )
|
|
{
|
|
a = begin + tok_get_pos( &tok );
|
|
b = a + wcslen(tok_last(&tok));
|
|
break;
|
|
}
|
|
|
|
/*
|
|
Remember previous string token
|
|
*/
|
|
if( tok_last_type( &tok ) == TOK_STRING )
|
|
{
|
|
pa = begin + tok_get_pos( &tok );
|
|
pb = pa + wcslen(tok_last(&tok));
|
|
}
|
|
}
|
|
|
|
free( buffcpy);
|
|
|
|
tok_destroy( &tok );
|
|
|
|
if( tok_begin )
|
|
{
|
|
*tok_begin = a;
|
|
}
|
|
|
|
if( tok_end )
|
|
{
|
|
*tok_end = b;
|
|
}
|
|
|
|
if( prev_begin )
|
|
{
|
|
*prev_begin = pa;
|
|
}
|
|
|
|
if( prev_end )
|
|
{
|
|
*prev_end = pb;
|
|
}
|
|
|
|
assert( pa >= buff );
|
|
assert( pa <= (buff+wcslen(buff) ) );
|
|
assert( pb >= pa );
|
|
assert( pb <= (buff+wcslen(buff) ) );
|
|
|
|
}
|
|
|
|
void parse_util_set_argv( const wchar_t * const *argv, const wcstring_list_t &named_arguments )
|
|
{
|
|
if( *argv )
|
|
{
|
|
const wchar_t * const *arg;
|
|
string_buffer_t sb;
|
|
sb_init( &sb );
|
|
|
|
for( arg=argv; *arg; arg++ )
|
|
{
|
|
if( arg != argv )
|
|
{
|
|
sb_append( &sb, ARRAY_SEP_STR );
|
|
}
|
|
sb_append( &sb, *arg );
|
|
}
|
|
|
|
env_set( L"argv", (wchar_t *)sb.buff, ENV_LOCAL );
|
|
sb_destroy( &sb );
|
|
}
|
|
else
|
|
{
|
|
env_set( L"argv", 0, ENV_LOCAL );
|
|
}
|
|
|
|
if( named_arguments.size() )
|
|
{
|
|
const wchar_t * const *arg;
|
|
size_t i;
|
|
|
|
for( i=0, arg=argv; i < named_arguments.size(); i++ )
|
|
{
|
|
env_set( named_arguments.at(i).c_str(), *arg, ENV_LOCAL );
|
|
|
|
if( *arg )
|
|
arg++;
|
|
}
|
|
|
|
|
|
}
|
|
|
|
}
|
|
|
|
wchar_t *parse_util_unescape_wildcards( const wchar_t *str )
|
|
{
|
|
wchar_t *in, *out;
|
|
wchar_t *unescaped;
|
|
|
|
CHECK( str, 0 );
|
|
|
|
unescaped = wcsdup(str);
|
|
|
|
if( !unescaped )
|
|
{
|
|
DIE_MEM();
|
|
}
|
|
|
|
for( in=out=unescaped; *in; in++ )
|
|
{
|
|
switch( *in )
|
|
{
|
|
case L'\\':
|
|
{
|
|
if( *(in+1) )
|
|
{
|
|
in++;
|
|
*(out++)=*in;
|
|
}
|
|
*(out++)=*in;
|
|
break;
|
|
}
|
|
|
|
case L'*':
|
|
{
|
|
*(out++)=ANY_STRING;
|
|
break;
|
|
}
|
|
|
|
case L'?':
|
|
{
|
|
*(out++)=ANY_CHAR;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
*(out++)=*in;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return unescaped;
|
|
}
|
|
|