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psyced/utility/cvsdont.pike

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#!/bin/env pike
// well, i'm using it. makes cdifs a lot nicer.
// saga.
//
// oh interesting. how does it work? does it have
// a usage: message? -lynX
#define unless(x) if(!(x))
int main() {
int flag, i = -1, j, haveCuts;
Stdio.File conf = Stdio.File();
array(string) data;
array(int) cuts = ({});
mapping donts = ([]);
unless (getenv("HOME")) {
werror("well, set $HOME, svp.\n");
return 1;
}
unless (conf->open(getenv("HOME") + "/.cvsdont", "r")) {
werror("well, could not open " + getenv("HOME") + "/.cvsdont\n");
return 2;
}
foreach (conf->read() / "\n", string line) {
donts[line] = 1;
}
data = Stdio.stdin->read() / "\n";
if (data[-1] == "") {
data = data[0..sizeof(data) - 2];
}
foreach (data, string line) {
i++;
unless (flag) {
if (sizeof(line) > 10 && line[0..9] == "RCS file: " && donts[line[10..sizeof(line) - 1]]) {
flag = !flag;
cuts += ({ i - 2 });
}
} else {
if (line[0] == '=') {
flag = !flag;
cuts += ({ i - 1 });
}
}
}
i = -1;
flag = 0;
haveCuts = sizeof(cuts);
#ifdef DEBUG
werror("%O\n", cuts);
#endif
if (haveCuts & 1) {
cuts += ({ sizeof(data) });
haveCuts++;
}
#ifdef DEBUG
werror("%O\n", cuts);
#endif
foreach (data, string line) {
i++;
#ifdef DEBUG
if (haveCuts > j) {
werror("} %d %d (%d)\n", i, cuts[j], (haveCuts - 1) > j);
} else {
werror("}} %d %d\n", i, j);
}
#endif
if (haveCuts > j && cuts[j] == i) {
#ifdef DEBUG
if ((haveCuts - 1) > j) {
werror("1] %d %d\n", j, cuts[j]);
werror("2] %d\n", cuts[j+1]);
} else {
werror("] %d %d(%d)\n", j, haveCuts, sizeof(cuts));
}
#endif
unless ((haveCuts - 1) > j && i == cuts[j + 1]) {
#ifdef DEBUG
werror(">> %d\n", i);
werror(") %d %d %d %d\n", i, j, cuts[j], flag);
#endif
flag = !flag;
} else {
#ifdef DEBUG
werror("> %d %d\n", i, ((haveCuts - 1) > j) ? cuts[j+1] : 0);
#endif
j++;
}
j++;
}
unless (flag || line[0] == '?') {
write("%s\n", line);
}
}
return 0;
}