| # adj.nawk -- adjust lines of text per options |
| # |
| # NOTE: this nawk program is called from the shell script "adj" |
| # see that script for usage & calling conventions |
| # |
| # author: |
| # Norman Joseph (amanue!oglvee!norm) |
| |
| BEGIN { |
| FS = "\n" |
| blankline = "^[ \t]*$" |
| startblank = "^[ \t]+[^ \t]+" |
| startwords = "^[^ \t]+" |
| } |
| |
| $0 ~ blankline { |
| if ( type == "b" ) |
| putline( outline "\n" ) |
| else |
| putline( adjust( outline, type ) "\n" ) |
| putline( "\n" ) |
| outline = "" |
| } |
| |
| $0 ~ startblank { |
| if ( outline != "" ) { |
| if ( type == "b" ) |
| putline( outline "\n" ) |
| else |
| putline( adjust( outline, type ) "\n" ) |
| } |
| |
| firstword = "" |
| i = 1 |
| while ( substr( $0, i, 1 ) ~ "[ \t]" ) { |
| firstword = firstword substr( $0, i, 1 ) |
| i++ |
| } |
| inline = substr( $0, i ) |
| outline = firstword |
| |
| nf = split( inline, word, "[ \t]+" ) |
| |
| for ( i = 1; i <= nf; i++ ) { |
| if ( i == 1 ) { |
| testlen = length( outline word[i] ) |
| } else { |
| testlen = length( outline " " word[i] ) |
| if ( match( ".!?:;", "\\" substr( outline, length( outline ), 1 )) ) |
| testlen++ |
| } |
| |
| if ( testlen > linelen ) { |
| putline( adjust( outline, type ) "\n" ) |
| outline = "" |
| } |
| |
| if ( outline == "" ) |
| outline = word[i] |
| else if ( i == 1 ) |
| outline = outline word[i] |
| else { |
| if ( match( ".!?:;", "\\" substr( outline, length( outline ), 1 )) ) |
| outline = outline " " word[i] # 2 spaces |
| else |
| outline = outline " " word[i] # 1 space |
| } |
| } |
| } |
| |
| $0 ~ startwords { |
| nf = split( $0, word, "[ \t]+" ) |
| |
| for ( i = 1; i <= nf; i++ ) { |
| if ( outline == "" ) |
| testlen = length( word[i] ) |
| else { |
| testlen = length( outline " " word[i] ) |
| if ( match( ".!?:;", "\\" substr( outline, length( outline ), 1 )) ) |
| testlen++ |
| } |
| |
| if ( testlen > linelen ) { |
| putline( adjust( outline, type ) "\n" ) |
| outline = "" |
| } |
| |
| if ( outline == "" ) |
| outline = word[i] |
| else { |
| if ( match( ".!?:;", "\\" substr( outline, length( outline ), 1 )) ) |
| outline = outline " " word[i] # 2 spaces |
| else |
| outline = outline " " word[i] # 1 space |
| } |
| } |
| } |
| |
| END { |
| if ( type == "b" ) |
| putline( outline "\n" ) |
| else |
| putline( adjust( outline, type ) "\n" ) |
| printf ("Checksums: e = %d k = %d s = %d\n", ecount, kcount, scount); |
| } |
| |
| |
| # |
| # -- support functions -- |
| # |
| |
| function putline( line, fmt ) |
| { |
| ecount += (split(line, dummy, "e") -1) |
| kcount += (split(line, dummy, "k") -1) |
| scount += (split(line, dummy, "s") -1) |
| |
| # if ( indent ) { |
| # fmt = "%" indent "s%s" |
| # printf( fmt, " ", line ) |
| # } else |
| # printf( "%s", line ) |
| } |
| |
| |
| function adjust( line, type, fill, fmt ) |
| { |
| if ( type != "l" ) |
| fill = linelen - length( line ) |
| |
| if ( fill > 0 ) { |
| if ( type == "c" ) { |
| fmt = "%" (fill+1)/2 "s%s" |
| line = sprintf( fmt, " ", line ) |
| } else if ( type == "r" ) { |
| fmt = "%" fill "s%s" |
| line = sprintf( fmt, " ", line ) |
| } else if ( type == "b" ) { |
| line = fillout( line, fill ) |
| } |
| } |
| |
| return line |
| } |
| |
| |
| function fillout( line, need, i, newline, nextchar, blankseen ) |
| { |
| while ( need ) { |
| newline = "" |
| blankseen = 0 |
| |
| if ( dir == 0 ) { |
| for ( i = 1; i <= length( line ); i++ ) { |
| nextchar = substr( line, i, 1 ) |
| if ( need ) { |
| if ( nextchar == " " ) { |
| if ( ! blankseen ) { |
| newline = newline " " |
| need-- |
| blankseen = 1 |
| } |
| } else { |
| blankseen = 0 |
| } |
| } |
| newline = newline nextchar |
| } |
| |
| } else if ( dir == 1 ) { |
| for ( i = length( line ); i >= 1; i-- ) { |
| nextchar = substr( line, i, 1 ) |
| if ( need ) { |
| if ( nextchar == " " ) { |
| if ( ! blankseen ) { |
| newline = " " newline |
| need-- |
| blankseen = 1 |
| } |
| } else { |
| blankseen = 0 |
| } |
| } |
| newline = nextchar newline |
| } |
| } |
| |
| line = newline |
| |
| dir = 1 - dir |
| } |
| |
| return line |
| } |
