forked from OSchip/llvm-project
36 lines
763 B
Tcl
Executable File
36 lines
763 B
Tcl
Executable File
#!/usr/bin/tclsh
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#
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# Usage:
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# prcontext <pattern> <# lines of context>
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# (for platforms that don't have grep -C)
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#
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# Get the arguments
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#
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set pattern [lindex $argv 0]
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set num [lindex $argv 1]
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#
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# Get all of the lines in the file.
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#
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set lines [split [read stdin] \n]
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set index 0
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foreach line $lines {
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if { [regexp $pattern $line match matchline] } {
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if { [ expr [expr $index - $num] < 0 ] } {
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set bottom 0
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} else {
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set bottom [expr $index - $num]
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}
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set endLineNum [ expr [expr $index + $num] + 1]
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while {$bottom < $endLineNum} {
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set output [lindex $lines $bottom]
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puts $output
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set bottom [expr $bottom + 1]
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}
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}
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set index [expr $index + 1]
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} |