| 804 | | * vlc_parse_cmdline: Command line parsing into elements. |
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| 805 | | * |
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| 806 | | * The command line is composed of space/tab separated arguments. |
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| 807 | | * Quotes can be used as argument delimiters and a backslash can be used to |
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| 808 | | * escape a quote. |
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| 809 | | *************************************************************************/ |
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| 810 | | static void find_end_quote( char **s, char **ppsz_parser, int i_quote ) |
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| 811 | | { |
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| 812 | | int i_bcount = 0; |
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| 813 | | |
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| 814 | | while( **s ) |
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| 815 | | { |
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| 816 | | if( **s == '\\' ) |
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| 817 | | { |
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| 818 | | **ppsz_parser = **s; |
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| 819 | | (*ppsz_parser)++; (*s)++; |
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| 820 | | i_bcount++; |
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| 821 | | } |
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| 822 | | else if( **s == '"' || **s == '\'' ) |
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| 823 | | { |
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| 824 | | /* Preceeded by a number of '\' which we erase. */ |
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| 825 | | *ppsz_parser -= i_bcount / 2; |
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| 826 | | if( i_bcount & 1 ) |
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| 827 | | { |
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| 828 | | /* '\\' followed by a '"' or '\'' */ |
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| 829 | | *ppsz_parser -= 1; |
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| 830 | | **ppsz_parser = **s; |
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| 831 | | (*ppsz_parser)++; (*s)++; |
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| 832 | | i_bcount = 0; |
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| 833 | | continue; |
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| 834 | | } |
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| 835 | | |
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| 836 | | if( **s == i_quote ) |
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| 837 | | { |
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| 838 | | /* End */ |
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| 839 | | return; |
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| 840 | | } |
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| 841 | | else |
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| 842 | | { |
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| 843 | | /* Different quoting */ |
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| 844 | | int i_quote = **s; |
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| 845 | | **ppsz_parser = **s; |
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| 846 | | (*ppsz_parser)++; (*s)++; |
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| 847 | | find_end_quote( s, ppsz_parser, i_quote ); |
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| 848 | | **ppsz_parser = **s; |
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| 849 | | (*ppsz_parser)++; (*s)++; |
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| 850 | | } |
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| 851 | | |
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| 852 | | i_bcount = 0; |
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| 853 | | } |
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| 854 | | else |
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| 855 | | { |
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| 856 | | /* A regular character */ |
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| 857 | | **ppsz_parser = **s; |
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| 858 | | (*ppsz_parser)++; (*s)++; |
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| 859 | | i_bcount = 0; |
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| 860 | | } |
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| 861 | | } |
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| 862 | | } |
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| 863 | | |
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| 864 | | char **vlc_parse_cmdline( const char *psz_cmdline, int *i_args ) |
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| 865 | | { |
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| 866 | | int argc = 0; |
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| 867 | | char **argv = 0; |
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| 868 | | char *s, *psz_parser, *psz_arg, *psz_orig; |
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| 869 | | int i_bcount = 0; |
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| 870 | | |
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| 871 | | if( !psz_cmdline ) return 0; |
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| 872 | | psz_orig = strdup( psz_cmdline ); |
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| 873 | | psz_arg = psz_parser = s = psz_orig; |
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| 874 | | |
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| 875 | | while( *s ) |
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| 876 | | { |
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| 877 | | if( *s == '\t' || *s == ' ' ) |
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| 878 | | { |
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| 879 | | /* We have a complete argument */ |
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| 880 | | *psz_parser = 0; |
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| 881 | | TAB_APPEND( argc, argv, strdup(psz_arg) ); |
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| 882 | | |
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| 883 | | /* Skip trailing spaces/tabs */ |
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| 884 | | do{ s++; } while( *s == '\t' || *s == ' ' ); |
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| 885 | | |
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| 886 | | /* New argument */ |
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| 887 | | psz_arg = psz_parser = s; |
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| 888 | | i_bcount = 0; |
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| 889 | | } |
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| 890 | | else if( *s == '\\' ) |
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| 891 | | { |
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| 892 | | *psz_parser++ = *s++; |
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| 893 | | i_bcount++; |
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| 894 | | } |
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| 895 | | else if( *s == '"' || *s == '\'' ) |
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| 896 | | { |
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| 897 | | if( ( i_bcount & 1 ) == 0 ) |
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| 898 | | { |
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| 899 | | /* Preceeded by an even number of '\', this is half that |
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| 900 | | * number of '\', plus a quote which we erase. */ |
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| 901 | | int i_quote = *s; |
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| 902 | | psz_parser -= i_bcount / 2; |
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| 903 | | s++; |
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| 904 | | find_end_quote( &s, &psz_parser, i_quote ); |
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| 905 | | s++; |
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| 906 | | } |
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| 907 | | else |
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| 908 | | { |
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| 909 | | /* Preceeded by an odd number of '\', this is half that |
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| 910 | | * number of '\' followed by a '"' */ |
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| 911 | | psz_parser = psz_parser - i_bcount/2 - 1; |
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| 912 | | *psz_parser++ = '"'; |
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| 913 | | s++; |
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| 914 | | } |
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| 915 | | i_bcount = 0; |
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| 916 | | } |
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| 917 | | else |
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| 918 | | { |
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| 919 | | /* A regular character */ |
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| 920 | | *psz_parser++ = *s++; |
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| 921 | | i_bcount = 0; |
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| 922 | | } |
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| 923 | | } |
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| 924 | | |
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| 925 | | /* Take care of the last arg */ |
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| 926 | | if( *psz_arg ) |
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| 927 | | { |
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| 928 | | *psz_parser = '\0'; |
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| 929 | | TAB_APPEND( argc, argv, strdup(psz_arg) ); |
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| 930 | | } |
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| 931 | | |
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| 932 | | if( i_args ) *i_args = argc; |
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| 933 | | free( psz_orig ); |
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| 934 | | return argv; |
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| 935 | | } |
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| 936 | | |
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| 937 | | /************************************************************************* |
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