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b14209b789
Cleanup done while researching the Boost Jam internals. Added better implementation description comments at many places. Cleaned up the 'dependant' and 'dependency' terminology that got mixed up in several places. Renamed several functions to use underscores as word separators. [SVN r48480]
253 lines
6.4 KiB
C
253 lines
6.4 KiB
C
/*
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* Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc.
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*
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* This file is part of Jam - see jam.c for Copyright information.
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*/
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/* This file is ALSO:
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* Copyright 2001-2004 David Abrahams.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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*/
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# include "jam.h"
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# include "pathsys.h"
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# ifdef OS_MAC
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# define DELIM ':'
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/*
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* pathunix.c - manipulate file names on UNIX, NT, OS2
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*
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* External routines:
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*
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* path_parse() - split a file name into dir/base/suffix/member
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* path_build() - build a filename given dir/base/suffix/member
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* path_parent() - make a PATHNAME point to its parent dir
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*
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* File_parse() and path_build() just manipuate a string and a structure;
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* they do not make system calls.
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*
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* 04/08/94 (seiwald) - Coherent/386 support added.
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* 12/26/93 (seiwald) - handle dir/.suffix properly in path_build()
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* 12/19/94 (mikem) - solaris string table insanity support
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* 12/21/94 (wingerd) Use backslashes for pathnames - the NT way.
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* 02/14/95 (seiwald) - parse and build /xxx properly
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* 02/23/95 (wingerd) Compilers on NT can handle "/" in pathnames, so we
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* should expect hdr searches to come up with strings
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* like "thing/thing.h". So we need to test for "/" as
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* well as "\" when parsing pathnames.
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* 03/16/95 (seiwald) - fixed accursed typo on line 69.
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* 05/03/96 (seiwald) - split from filent.c, fileunix.c
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* 12/20/96 (seiwald) - when looking for the rightmost . in a file name,
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* don't include the archive member name.
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* 01/10/01 (seiwald) - path_parse now strips the trailing : from the
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* directory name, unless the directory name is all
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* :'s, so that $(d:P) works.
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*/
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/*
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* path_parse() - split a file name into dir/base/suffix/member
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*/
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void
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path_parse(
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char *file,
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PATHNAME *f )
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{
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char *p, *q;
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char *end;
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memset( (char *)f, 0, sizeof( *f ) );
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/* Look for <grist> */
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if ( file[0] == '<' && ( p = strchr( file, '>' ) ) )
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{
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f->f_grist.ptr = file;
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f->f_grist.len = p - file;
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file = p + 1;
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}
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/* Look for dir: */
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if ( p = strrchr( file, DELIM ) )
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{
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f->f_dir.ptr = file;
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f->f_dir.len = p - file;
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file = p + 1;
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/* All :'s? Include last : as part of directory name */
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while ( ( p > f->f_dir.ptr ) && ( *--p == DELIM ) );
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if ( p == f->f_dir.ptr )
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++f->f_dir.len;
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}
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end = file + strlen( file );
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/* Look for (member). */
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if ( ( p = strchr( file, '(' ) ) && ( end[-1] == ')' ) )
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{
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f->f_member.ptr = p + 1;
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f->f_member.len = end - p - 2;
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end = p;
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}
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/* Look for .suffix */
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/* This would be memrchr() */
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p = 0;
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q = file;
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while ( q = memchr( q, '.', end - q ) )
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p = q++;
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if ( p )
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{
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f->f_suffix.ptr = p;
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f->f_suffix.len = end - p;
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end = p;
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}
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/* Leaves base */
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f->f_base.ptr = file;
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f->f_base.len = end - file;
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}
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/*
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* path_build() - build a filename given dir/base/suffix/member.
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*/
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# define DIR_EMPTY 0 /* "" */
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# define DIR_DOT 1 /* : */
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# define DIR_DOTDOT 2 /* :: */
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# define DIR_ABS 3 /* dira:dirb: */
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# define DIR_REL 4 /* :dira:dirb: */
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# define G_DIR 0 /* take dir */
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# define G_ROOT 1 /* take root */
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# define G_CAT 2 /* prepend root to dir */
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# define G_DTDR 3 /* :: of rel dir */
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# define G_DDDD 4 /* make it ::: (../..) */
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# define G_MT 5 /* leave it empty */
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char grid[5][5] = {
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/* EMPTY DOT DOTDOT ABS REL */
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/* EMPTY */ { G_MT, G_DIR, G_DIR, G_DIR, G_DIR },
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/* DOT */ { G_ROOT, G_DIR, G_DIR, G_DIR, G_DIR },
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/* DOTDOT */ { G_ROOT, G_ROOT, G_DDDD, G_DIR, G_DTDR },
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/* ABS */ { G_ROOT, G_ROOT, G_ROOT, G_DIR, G_CAT },
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/* REL */ { G_ROOT, G_ROOT, G_ROOT, G_DIR, G_CAT }
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};
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static int file_flags( char * ptr, int len )
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{
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if ( !len )
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return DIR_EMPTY;
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if ( ( len == 1 ) && ( ptr[0] == DELIM ) )
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return DIR_DOT;
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if ( ( len == 2 ) && ( ptr[0] == DELIM ) && ( ptr[1] == DELIM ) )
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return DIR_DOTDOT;
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if ( ptr[0] == DELIM )
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return DIR_REL;
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return DIR_ABS;
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}
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void path_build( PATHNAME * f, string * file, int binding )
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{
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int dflag;
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int rflag;
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int act;
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file_build1( f, file );
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/* Combine root & directory, according to the grid. */
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dflag = file_flags( f->f_dir.ptr, f->f_dir.len );
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rflag = file_flags( f->f_root.ptr, f->f_root.len );
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switch ( act = grid[ rflag ][ dflag ] )
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{
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case G_DTDR:
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{
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/* :: of rel dir */
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string_push_back( file, DELIM );
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}
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/* fall through */
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case G_DIR:
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/* take dir */
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string_append_range( file, f->f_dir.ptr, f->f_dir.ptr + f->f_dir.len );
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break;
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case G_ROOT:
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/* take root */
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string_append_range( file, f->f_root.ptr, f->f_root.ptr + f->f_root.len );
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break;
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case G_CAT:
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/* prepend root to dir */
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string_append_range( file, f->f_root.ptr, f->f_root.ptr + f->f_root.len );
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if ( file->value[ file->size - 1 ] == DELIM )
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string_pop_back( file );
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string_append_range( file, f->f_dir.ptr, f->f_dir.ptr + f->f_dir.len );
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break;
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case G_DDDD:
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/* make it ::: (../..) */
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string_append( file, ":::" );
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break;
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}
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/* Put : between dir and file (if none already). */
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if ( ( act != G_MT ) &&
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( file->value[ file->size - 1 ] != DELIM ) &&
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( f->f_base.len || f->f_suffix.len ) )
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{
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string_push_back( file, DELIM );
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}
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if ( f->f_base.len )
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string_append_range( file, f->f_base.ptr, f->f_base.ptr + f->f_base.len );
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if ( f->f_suffix.len )
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string_append_range( file, f->f_suffix.ptr, f->f_suffix.ptr + f->f_suffix.len );
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if ( f->f_member.len )
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{
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string_push_back( file, '(' );
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string_append_range( file, f->f_member.ptr, f->f_member.ptr + f->f_member.len );
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string_push_back( file, ')' );
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}
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if ( DEBUG_SEARCH )
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printf( " -> '%s'\n", file->value );
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}
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/*
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* path_parent() - make a PATHNAME point to its parent dir
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*/
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void path_parent( PATHNAME * f )
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{
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/* Just set everything else to nothing. */
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f->f_base.ptr =
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f->f_suffix.ptr =
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f->f_member.ptr = "";
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f->f_base.len =
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f->f_suffix.len =
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f->f_member.len = 0;
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}
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# endif /* OS_MAC */
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