summaryrefslogtreecommitdiff
path: root/jam-files/engine/expand.c
diff options
context:
space:
mode:
authorKenneth Heafield <github@kheafield.com>2012-10-22 12:07:20 +0100
committerKenneth Heafield <github@kheafield.com>2012-10-22 12:07:20 +0100
commit5f98fe5c4f2a2090eeb9d30c030305a70a8347d1 (patch)
tree9b6002f850e6dea1e3400c6b19bb31a9cdf3067f /jam-files/engine/expand.c
parentcf9994131993b40be62e90e213b1e11e6b550143 (diff)
parent21825a09d97c2e0afd20512f306fb25fed55e529 (diff)
Merge remote branch 'upstream/master'
Conflicts: Jamroot bjam decoder/Jamfile decoder/cdec.cc dpmert/Jamfile jam-files/sanity.jam klm/lm/Jamfile klm/util/Jamfile mira/Jamfile
Diffstat (limited to 'jam-files/engine/expand.c')
-rw-r--r--jam-files/engine/expand.c733
1 files changed, 0 insertions, 733 deletions
diff --git a/jam-files/engine/expand.c b/jam-files/engine/expand.c
deleted file mode 100644
index d8e58827..00000000
--- a/jam-files/engine/expand.c
+++ /dev/null
@@ -1,733 +0,0 @@
-/*
- * Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc.
- *
- * This file is part of Jam - see jam.c for Copyright information.
- */
-
-# include "jam.h"
-# include "lists.h"
-# include "variable.h"
-# include "expand.h"
-# include "pathsys.h"
-# include "newstr.h"
-# include <assert.h>
-# include <stdlib.h>
-# include <limits.h>
-
-# ifdef OS_CYGWIN
-# include <sys/cygwin.h>
-# include <windows.h>
-# endif
-
-/*
- * expand.c - expand a buffer, given variable values
- *
- * External routines:
- *
- * var_expand() - variable-expand input string into list of strings
- *
- * Internal routines:
- *
- * var_edit_parse() - parse : modifiers into PATHNAME structure.
- * var_edit_file() - copy input target name to output, modifying filename.
- * var_edit_shift() - do upshift/downshift mods.
- *
- * 01/25/94 (seiwald) - $(X)$(UNDEF) was expanding like plain $(X)
- * 04/13/94 (seiwald) - added shorthand L0 for null list pointer
- * 01/11/01 (seiwald) - added support for :E=emptyvalue, :J=joinval
- */
-
-typedef struct
-{
- PATHNAME f; /* :GDBSMR -- pieces */
- char parent; /* :P -- go to parent directory */
- char filemods; /* one of the above applied */
- char downshift; /* :L -- downshift result */
- char upshift; /* :U -- upshift result */
- char to_slashes; /* :T -- convert "\" to "/" */
- char to_windows; /* :W -- convert cygwin to native paths */
- PATHPART empty; /* :E -- default for empties */
- PATHPART join; /* :J -- join list with char */
-} VAR_EDITS ;
-
-static void var_edit_parse( char * mods, VAR_EDITS * edits );
-static void var_edit_file ( char * in, string * out, VAR_EDITS * edits );
-static void var_edit_shift( string * out, VAR_EDITS * edits );
-
-#define MAGIC_COLON '\001'
-#define MAGIC_LEFT '\002'
-#define MAGIC_RIGHT '\003'
-
-
-/*
- * var_expand() - variable-expand input string into list of strings.
- *
- * Would just copy input to output, performing variable expansion, except that
- * since variables can contain multiple values the result of variable expansion
- * may contain multiple values (a list). Properly performs "product" operations
- * that occur in "$(var1)xxx$(var2)" or even "$($(var2))".
- *
- * Returns a newly created list.
- */
-
-LIST * var_expand( LIST * l, char * in, char * end, LOL * lol, int cancopyin )
-{
- char out_buf[ MAXSYM ];
- string buf[ 1 ];
- string out1[ 1 ]; /* temporary buffer */
- size_t prefix_length;
- char * out;
- char * inp = in;
- char * ov; /* for temp copy of variable in outbuf */
- int depth;
-
- if ( DEBUG_VAREXP )
- printf( "expand '%.*s'\n", end - in, in );
-
- /* This gets a lot of cases: $(<) and $(>). */
- if
- (
- ( in[ 0 ] == '$' ) &&
- ( in[ 1 ] == '(' ) &&
- ( in[ 3 ] == ')' ) &&
- ( in[ 4 ] == '\0' )
- )
- {
- switch ( in[ 2 ] )
- {
- case '<': return list_copy( l, lol_get( lol, 0 ) );
- case '>': return list_copy( l, lol_get( lol, 1 ) );
-
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- return list_copy( l, lol_get( lol, in[ 2 ] - '1' ) );
- }
- }
- else if ( in[0] == '$' && in[1] == '(' && in[2] == '1' && in[4] == ')' &&
- in[5] == '\0') {
-
- switch( in[3] )
- {
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- return list_copy( l, lol_get( lol, in[3]-'0'+10-1 ) );
- }
- }
-
- /* Expand @() files, to single item plus accompanying file. */
- if ( ( in[ 0 ] == '@' ) && ( in[ 1 ] == '(' ) && ( *( end - 1 ) == ')' ) )
- {
- /* We try the expansion until it fits within the propective output
- * buffer.
- */
- char * at_buf = 0;
- int at_size = MAXJPATH;
- int at_len = 0;
- do
- {
- BJAM_FREE( at_buf );
- at_buf = (char *)BJAM_MALLOC_ATOMIC( at_size + 1 );
- at_len = var_string( in, at_buf, at_size, lol );
- at_size *= 2;
- }
- while ( ( at_len < 0 ) && ( at_size < INT_MAX / 2 ) );
- /* Return the result as a single item list. */
- if ( at_len > 0 )
- {
- LIST * r;
- string_copy( buf, at_buf );
- r = list_new( l, newstr( buf->value ) );
- string_free( buf );
- BJAM_FREE( at_buf );
- return r;
- }
- BJAM_FREE( at_buf );
- }
-
- /* Just try simple copy of in to out. */
- while ( in < end )
- if ( ( *in++ == '$' ) && ( *in == '(' ) )
- goto expand;
-
- /* No variables expanded - just add copy of input string to list. */
-
- /* 'cancopyin' is an optimization: if the input was already a list item, we
- * can use copystr() to put it on the new list. Otherwise, we use the slower
- * newstr().
- */
- if ( cancopyin )
- return list_new( l, copystr( inp ) );
-
- {
- LIST * r;
- string_new( buf );
- string_append_range( buf, inp, end );
- r = list_new( l, newstr( buf->value ) );
- string_free( buf );
- return r;
- }
-
-expand:
- string_new( buf );
- string_append_range( buf, inp, in - 1 ); /* Copy the part before '$'. */
- /*
- * Input so far (ignore blanks):
- *
- * stuff-in-outbuf $(variable) remainder
- * ^ ^
- * in end
- * Output so far:
- *
- * stuff-in-outbuf $
- * ^ ^
- * out_buf out
- *
- *
- * We just copied the $ of $(...), so back up one on the output. We now find
- * the matching close paren, copying the variable and modifiers between the
- * $( and ) temporarily into out_buf, so that we can replace :'s with
- * MAGIC_COLON. This is necessary to avoid being confused by modifier values
- * that are variables containing :'s. Ugly.
- */
-
- depth = 1;
- inp = ++in; /* Skip over the '('. */
-
- while ( ( in < end ) && depth )
- {
- switch ( *in++ )
- {
- case '(': ++depth; break;
- case ')': --depth; break;
- }
- }
-
- /*
- * Input so far (ignore blanks):
- *
- * stuff-in-outbuf $(variable) remainder
- * ^ ^ ^
- * inp in end
- */
- prefix_length = buf->size;
- string_append_range( buf, inp, in - 1 );
-
- out = buf->value + prefix_length;
- for ( ov = out; ov < buf->value + buf->size; ++ov )
- {
- switch ( *ov )
- {
- case ':': *ov = MAGIC_COLON; break;
- case '[': *ov = MAGIC_LEFT ; break;
- case ']': *ov = MAGIC_RIGHT; break;
- }
- }
-
- /*
- * Input so far (ignore blanks):
- *
- * stuff-in-outbuf $(variable) remainder
- * ^ ^
- * in end
- * Output so far:
- *
- * stuff-in-outbuf variable
- * ^ ^ ^
- * out_buf out ov
- *
- * Later we will overwrite 'variable' in out_buf, but we will be done with
- * it by then. 'variable' may be a multi-element list, so may each value for
- * '$(variable element)', and so may 'remainder'. Thus we produce a product
- * of three lists.
- */
- {
- LIST * variables = 0;
- LIST * remainder = 0;
- LIST * vars;
-
- /* Recursively expand variable name & rest of input. */
- if ( out < ov ) variables = var_expand( L0, out, ov, lol, 0 );
- if ( in < end ) remainder = var_expand( L0, in, end, lol, 0 );
-
- /* Now produce the result chain. */
-
- /* For each variable name. */
- for ( vars = variables; vars; vars = list_next( vars ) )
- {
- LIST * value = 0;
- LIST * evalue = 0;
- char * colon;
- char * bracket;
- string variable[1];
- char * varname;
- int sub1 = 0;
- int sub2 = -1;
- VAR_EDITS edits;
-
- /* Look for a : modifier in the variable name. Must copy into
- * varname so we can modify it.
- */
- string_copy( variable, vars->string );
- varname = variable->value;
-
- if ( ( colon = strchr( varname, MAGIC_COLON ) ) )
- {
- string_truncate( variable, colon - varname );
- var_edit_parse( colon + 1, &edits );
- }
-
- /* Look for [x-y] subscripting. sub1 and sub2 are x and y. */
- if ( ( bracket = strchr( varname, MAGIC_LEFT ) ) )
- {
- /* Make all syntax errors in [] subscripting result in the same
- * behavior: silenty return an empty expansion (by setting sub2
- * = 0). Brute force parsing; May get moved into yacc someday.
- */
-
- char * s = bracket + 1;
-
- string_truncate( variable, bracket - varname );
-
- do /* so we can use "break" */
- {
- /* Allow negative indexes. */
- if ( !isdigit( *s ) && ( *s != '-' ) )
- {
- sub2 = 0;
- break;
- }
- sub1 = atoi( s );
-
- /* Skip over the first symbol, which is either a digit or dash. */
- ++s;
- while ( isdigit( *s ) ) ++s;
-
- if ( *s == MAGIC_RIGHT )
- {
- sub2 = sub1;
- break;
- }
-
- if ( *s != '-' )
- {
- sub2 = 0;
- break;
- }
-
- ++s;
-
- if ( *s == MAGIC_RIGHT )
- {
- sub2 = -1;
- break;
- }
-
- if ( !isdigit( *s ) && ( *s != '-' ) )
- {
- sub2 = 0;
- break;
- }
-
- /* First, compute the index of the last element. */
- sub2 = atoi( s );
- while ( isdigit( *++s ) );
-
- if ( *s != MAGIC_RIGHT )
- sub2 = 0;
-
- } while ( 0 );
-
- /* Anything but the end of the string, or the colon introducing
- * a modifier is a syntax error.
- */
- ++s;
- if ( *s && ( *s != MAGIC_COLON ) )
- sub2 = 0;
-
- *bracket = '\0';
- }
-
- /* Get variable value, with special handling for $(<), $(>), $(n).
- */
- if ( !varname[1] )
- {
- if ( varname[0] == '<' )
- value = lol_get( lol, 0 );
- else if ( varname[0] == '>' )
- value = lol_get( lol, 1 );
- else if ( ( varname[0] >= '1' ) && ( varname[0] <= '9' ) )
- value = lol_get( lol, varname[0] - '1' );
- else if( varname[0] == '1' && varname[1] >= '0' &&
- varname[1] <= '9' && !varname[2] )
- value = lol_get( lol, varname[1] - '0' + 10 - 1 );
- }
-
- if ( !value )
- value = var_get( varname );
-
- /* Handle negitive indexes: part two. */
- {
- int length = list_length( value );
-
- if ( sub1 < 0 )
- sub1 = length + sub1;
- else
- sub1 -= 1;
-
- if ( sub2 < 0 )
- sub2 = length + 1 + sub2 - sub1;
- else
- sub2 -= sub1;
- /* The "sub2 < 0" test handles the semantic error of sub2 <
- * sub1.
- */
- if ( sub2 < 0 )
- sub2 = 0;
- }
-
- /* The fast path: $(x) - just copy the variable value. This is only
- * an optimization.
- */
- if ( ( out == out_buf ) && !bracket && !colon && ( in == end ) )
- {
- string_free( variable );
- l = list_copy( l, value );
- continue;
- }
-
- /* Handle start subscript. */
- while ( ( sub1 > 0 ) && value )
- --sub1, value = list_next( value );
-
- /* Empty w/ :E=default?. */
- if ( !value && colon && edits.empty.ptr )
- evalue = value = list_new( L0, newstr( edits.empty.ptr ) );
-
- /* For each variable value. */
- string_new( out1 );
- for ( ; value; value = list_next( value ) )
- {
- LIST * rem;
- size_t postfix_start;
-
- /* Handle end subscript (length actually). */
-
- if ( sub2 >= 0 && --sub2 < 0 )
- break;
-
- string_truncate( buf, prefix_length );
-
- /* Apply : mods, if present */
-
- if ( colon && edits.filemods )
- var_edit_file( value->string, out1, &edits );
- else
- string_append( out1, value->string );
-
- if ( colon && ( edits.upshift || edits.downshift || edits.to_slashes || edits.to_windows ) )
- var_edit_shift( out1, &edits );
-
- /* Handle :J=joinval */
- /* If we have more values for this var, just keep appending them
- * (using the join value) rather than creating separate LIST
- * elements.
- */
- if ( colon && edits.join.ptr &&
- ( list_next( value ) || list_next( vars ) ) )
- {
- string_append( out1, edits.join.ptr );
- continue;
- }
-
- string_append( buf, out1->value );
- string_free( out1 );
- string_new( out1 );
-
- /* If no remainder, append result to output chain. */
- if ( in == end )
- {
- l = list_new( l, newstr( buf->value ) );
- continue;
- }
-
- /* For each remainder, append the complete string to the output
- * chain. Remember the end of the variable expansion so we can
- * just tack on each instance of 'remainder'.
- */
- postfix_start = buf->size;
- for ( rem = remainder; rem; rem = list_next( rem ) )
- {
- string_truncate( buf, postfix_start );
- string_append( buf, rem->string );
- l = list_new( l, newstr( buf->value ) );
- }
- }
- string_free( out1 );
-
- /* Toss used empty. */
- if ( evalue )
- list_free( evalue );
-
- string_free( variable );
- }
-
- /* variables & remainder were gifts from var_expand and must be freed. */
- if ( variables ) list_free( variables );
- if ( remainder ) list_free( remainder );
-
- if ( DEBUG_VAREXP )
- {
- printf( "expanded to " );
- list_print( l );
- printf( "\n" );
- }
-
- string_free( buf );
- return l;
- }
-}
-
-
-/*
- * var_edit_parse() - parse : modifiers into PATHNAME structure
- *
- * The : modifiers in a $(varname:modifier) currently support replacing or
- * omitting elements of a filename, and so they are parsed into a PATHNAME
- * structure (which contains pointers into the original string).
- *
- * Modifiers of the form "X=value" replace the component X with the given value.
- * Modifiers without the "=value" cause everything but the component X to be
- * omitted. X is one of:
- *
- * G <grist>
- * D directory name
- * B base name
- * S .suffix
- * M (member)
- * R root directory - prepended to whole path
- *
- * This routine sets:
- *
- * f->f_xxx.ptr = 0
- * f->f_xxx.len = 0
- * -> leave the original component xxx
- *
- * f->f_xxx.ptr = string
- * f->f_xxx.len = strlen( string )
- * -> replace component xxx with string
- *
- * f->f_xxx.ptr = ""
- * f->f_xxx.len = 0
- * -> omit component xxx
- *
- * var_edit_file() below and path_build() obligingly follow this convention.
- */
-
-static void var_edit_parse( char * mods, VAR_EDITS * edits )
-{
- int havezeroed = 0;
- memset( (char *)edits, 0, sizeof( *edits ) );
-
- while ( *mods )
- {
- char * p;
- PATHPART * fp;
-
- switch ( *mods++ )
- {
- case 'L': edits->downshift = 1; continue;
- case 'U': edits->upshift = 1; continue;
- case 'P': edits->parent = edits->filemods = 1; continue;
- case 'E': fp = &edits->empty; goto strval;
- case 'J': fp = &edits->join; goto strval;
- case 'G': fp = &edits->f.f_grist; goto fileval;
- case 'R': fp = &edits->f.f_root; goto fileval;
- case 'D': fp = &edits->f.f_dir; goto fileval;
- case 'B': fp = &edits->f.f_base; goto fileval;
- case 'S': fp = &edits->f.f_suffix; goto fileval;
- case 'M': fp = &edits->f.f_member; goto fileval;
- case 'T': edits->to_slashes = 1; continue;
- case 'W': edits->to_windows = 1; continue;
- default:
- return; /* Should complain, but so what... */
- }
-
- fileval:
- /* Handle :CHARS, where each char (without a following =) selects a
- * particular file path element. On the first such char, we deselect all
- * others (by setting ptr = "", len = 0) and for each char we select
- * that element (by setting ptr = 0).
- */
- edits->filemods = 1;
-
- if ( *mods != '=' )
- {
- if ( !havezeroed++ )
- {
- int i;
- for ( i = 0; i < 6; ++i )
- {
- edits->f.part[ i ].len = 0;
- edits->f.part[ i ].ptr = "";
- }
- }
-
- fp->ptr = 0;
- continue;
- }
-
- strval:
- /* Handle :X=value, or :X */
- if ( *mods != '=' )
- {
- fp->ptr = "";
- fp->len = 0;
- }
- else if ( ( p = strchr( mods, MAGIC_COLON ) ) )
- {
- *p = 0;
- fp->ptr = ++mods;
- fp->len = p - mods;
- mods = p + 1;
- }
- else
- {
- fp->ptr = ++mods;
- fp->len = strlen( mods );
- mods += fp->len;
- }
- }
-}
-
-
-/*
- * var_edit_file() - copy input target name to output, modifying filename.
- */
-
-static void var_edit_file( char * in, string * out, VAR_EDITS * edits )
-{
- PATHNAME pathname;
-
- /* Parse apart original filename, putting parts into "pathname". */
- path_parse( in, &pathname );
-
- /* Replace any pathname with edits->f */
- if ( edits->f.f_grist .ptr ) pathname.f_grist = edits->f.f_grist;
- if ( edits->f.f_root .ptr ) pathname.f_root = edits->f.f_root;
- if ( edits->f.f_dir .ptr ) pathname.f_dir = edits->f.f_dir;
- if ( edits->f.f_base .ptr ) pathname.f_base = edits->f.f_base;
- if ( edits->f.f_suffix.ptr ) pathname.f_suffix = edits->f.f_suffix;
- if ( edits->f.f_member.ptr ) pathname.f_member = edits->f.f_member;
-
- /* If requested, modify pathname to point to parent. */
- if ( edits->parent )
- path_parent( &pathname );
-
- /* Put filename back together. */
- path_build( &pathname, out, 0 );
-}
-
-
-/*
- * var_edit_shift() - do upshift/downshift mods.
- */
-
-static void var_edit_shift( string * out, VAR_EDITS * edits )
-{
- /* Handle upshifting, downshifting and slash translation now. */
- char * p;
- for ( p = out->value; *p; ++p)
- {
- if ( edits->upshift )
- *p = toupper( *p );
- else if ( edits->downshift )
- *p = tolower( *p );
- if ( edits->to_slashes && ( *p == '\\' ) )
- *p = '/';
-# ifdef OS_CYGWIN
- if ( edits->to_windows )
- {
- char result[ MAX_PATH + 1 ];
- cygwin_conv_to_win32_path( out->value, result );
- assert( strlen( result ) <= MAX_PATH );
- string_free( out );
- string_copy( out, result );
- }
-# endif
- }
- out->size = p - out->value;
-}
-
-
-#ifndef NDEBUG
-void var_expand_unit_test()
-{
- LOL lol[ 1 ];
- LIST * l;
- LIST * l2;
- LIST * expected = list_new( list_new( L0, newstr( "axb" ) ), newstr( "ayb" ) );
- LIST * e2;
- char axyb[] = "a$(xy)b";
- char azb[] = "a$($(z))b";
- char path[] = "$(p:W)";
-
-# ifdef OS_CYGWIN
- char cygpath[ 256 ];
- cygwin_conv_to_posix_path( "c:\\foo\\bar", cygpath );
-# else
- char cygpath[] = "/cygdrive/c/foo/bar";
-# endif
-
- lol_init(lol);
- var_set( "xy", list_new( list_new( L0, newstr( "x" ) ), newstr( "y" ) ), VAR_SET );
- var_set( "z", list_new( L0, newstr( "xy" ) ), VAR_SET );
- var_set( "p", list_new( L0, newstr( cygpath ) ), VAR_SET );
-
- l = var_expand( 0, axyb, axyb + sizeof( axyb ) - 1, lol, 0 );
- for ( l2 = l, e2 = expected; l2 && e2; l2 = list_next( l2 ), e2 = list_next( e2 ) )
- assert( !strcmp( e2->string, l2->string ) );
- assert( l2 == 0 );
- assert( e2 == 0 );
- list_free( l );
-
- l = var_expand( 0, azb, azb + sizeof( azb ) - 1, lol, 0 );
- for ( l2 = l, e2 = expected; l2 && e2; l2 = list_next( l2 ), e2 = list_next( e2 ) )
- assert( !strcmp( e2->string, l2->string ) );
- assert( l2 == 0 );
- assert( e2 == 0 );
- list_free( l );
-
- l = var_expand( 0, path, path + sizeof( path ) - 1, lol, 0 );
- assert( l != 0 );
- assert( list_next( l ) == 0 );
-# ifdef OS_CYGWIN
- /* On some installations of cygwin the drive letter is expanded to other
- * case. This has been reported to be the case if cygwin has been installed
- * to C:\ as opposed to C:\cygwin. Since case of the drive letter will not
- * matter, we allow for both.
- */
- assert( !strcmp( l->string, "c:\\foo\\bar" ) ||
- !strcmp( l->string, "C:\\foo\\bar" ) );
-# else
- assert( !strcmp( l->string, cygpath ) );
-# endif
- list_free( l );
- list_free( expected );
- lol_free( lol );
-}
-#endif