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authorKenneth Heafield <github@kheafield.com>2012-05-12 14:01:52 -0400
committerKenneth Heafield <github@kheafield.com>2012-05-12 14:01:52 -0400
commit3faecf9a00512dcbc8712c4bca9adae72fb64410 (patch)
tree9761b50d12f81a675fb7cbc663ceebad15079f78 /jam-files/engine/option.c
parentc806a8fff63043f63773874986301f2822a2b552 (diff)
Give in and copy bjam into cdec source code
Diffstat (limited to 'jam-files/engine/option.c')
-rw-r--r--jam-files/engine/option.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/jam-files/engine/option.c b/jam-files/engine/option.c
new file mode 100644
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+++ b/jam-files/engine/option.c
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+/*
+ * Copyright 1993, 1995 Christopher Seiwald.
+ *
+ * This file is part of Jam - see jam.c for Copyright information.
+ */
+
+# include "jam.h"
+# include "option.h"
+
+/*
+ * option.c - command line option processing
+ *
+ * {o >o
+ * \<>) "Process command line options as defined in <option.h>.
+ * Return the number of argv[] elements used up by options,
+ * or -1 if an invalid option flag was given or an argument
+ * was supplied for an option that does not require one."
+ */
+
+int getoptions( int argc, char * * argv, char * opts, bjam_option * optv )
+{
+ int i;
+ int optc = N_OPTS;
+
+ memset( (char *)optv, '\0', sizeof( *optv ) * N_OPTS );
+
+ for ( i = 0; i < argc; ++i )
+ {
+ char *arg;
+
+ if ( ( argv[ i ][ 0 ] != '-' ) ||
+ ( ( argv[ i ][ 1 ] != '-' ) && !isalpha( argv[ i ][ 1 ] ) ) )
+ continue;
+
+ if ( !optc-- )
+ {
+ printf( "too many options (%d max)\n", N_OPTS );
+ return -1;
+ }
+
+ for ( arg = &argv[ i ][ 1 ]; *arg; ++arg )
+ {
+ char * f;
+
+ for ( f = opts; *f; ++f )
+ if ( *f == *arg )
+ break;
+
+ if ( !*f )
+ {
+ printf( "Invalid option: -%c\n", *arg );
+ return -1;
+ }
+
+ optv->flag = *f;
+
+ if ( f[ 1 ] != ':' )
+ {
+ optv++->val = "true";
+ }
+ else if ( arg[ 1 ] )
+ {
+ optv++->val = &arg[1];
+ break;
+ }
+ else if ( ++i < argc )
+ {
+ optv++->val = argv[ i ];
+ break;
+ }
+ else
+ {
+ printf( "option: -%c needs argument\n", *f );
+ return -1;
+ }
+ }
+ }
+
+ return i;
+}
+
+
+/*
+ * Name: getoptval() - find an option given its character.
+ */
+
+char * getoptval( bjam_option * optv, char opt, int subopt )
+{
+ int i;
+ for ( i = 0; i < N_OPTS; ++i, ++optv )
+ if ( ( optv->flag == opt ) && !subopt-- )
+ return optv->val;
+ return 0;
+}