| #!/bin/gawk -f |
| |
| # awk script that reads a patch from stdin and prints all #define statements |
| # that match the following patttern: |
| # +#ifndef <symbol> |
| # +#define <symbol> <text> |
| # +#endif |
| |
| BEGIN { |
| previous_is_ifndef = 0 |
| symbol = "" |
| } |
| |
| { |
| is_ifndef = match($0, "^+#ifndef (.*)$", a) |
| if (is_ifndef) |
| symbol = a[1] |
| is_define = previous_is_ifndef && match($0, "^+#define " + symbol) |
| if (is_define) |
| define = $0 |
| is_endif = match($0, "^+#endif$") |
| if (before_previous_is_ifndef && previous_is_define && is_endif) |
| print define |
| before_previous_is_ifndef = previous_is_ifndef |
| previous_is_ifndef = is_ifndef |
| previous_is_define = is_define |
| } |
