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https://github.com/tstack/lnav.git
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133 lines
2.2 KiB
C++
133 lines
2.2 KiB
C++
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#include "config.h"
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#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "grep_proc.hh"
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using namespace std;
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static struct {
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int l_number;
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const char *l_value;
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} MS_LINES[] = {
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{ 10, "" },
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{ 11, "" },
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{ 12, "" },
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{ 13, "" },
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{ 0, "" },
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{ 1, "" },
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{ 2, "" },
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};
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class my_source : public grep_proc_source {
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public:
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my_source() : ms_current_line(0) { };
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bool grep_value_for_line(int line_number, string &value_out) {
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bool retval = true;
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assert(line_number == MS_LINES[this->ms_current_line].l_number);
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value_out = MS_LINES[this->ms_current_line].l_value;
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this->ms_current_line += 1;
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return retval;
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};
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int ms_current_line;
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};
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class my_sleeper_source : public grep_proc_source {
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bool grep_value_for_line(int line_number, string &value_out) {
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sleep(1000);
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return true;
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};
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};
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class my_sink : public grep_proc_sink {
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public:
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my_sink() : ms_finished(false) { };
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void grep_match(grep_proc &gp,
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grep_line_t line,
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int start,
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int end) {
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};
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void grep_end(grep_proc &gp) {
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this->ms_finished = true;
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};
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bool ms_finished;
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};
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static fd_set READFDS;
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static int MAXFD;
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static void looper(grep_proc &gp)
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{
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my_sink msink;
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gp.set_sink(&msink);
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while (!msink.ms_finished) {
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fd_set rfds = READFDS;
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select(MAXFD + 1, &rfds, NULL, NULL, NULL);
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gp.check_fd_set(rfds);
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}
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}
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int main(int argc, char *argv[])
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{
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int eoff, retval = EXIT_SUCCESS;
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const char *errptr;
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pcre *code;
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FD_ZERO(&READFDS);
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code = pcre_compile("foobar",
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PCRE_CASELESS,
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&errptr,
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&eoff,
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NULL);
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assert(code != NULL);
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{
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my_source ms;
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grep_proc gp(code, ms, MAXFD, READFDS);
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gp.queue_request(grep_line_t(10), grep_line_t(14));
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gp.queue_request(grep_line_t(0), grep_line_t(3));
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gp.start();
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looper(gp);
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}
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{
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my_sleeper_source mss;
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grep_proc *gp = new grep_proc(code, mss, MAXFD, READFDS);
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int status;
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gp->queue_request();
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gp->start();
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assert(wait3(&status, WNOHANG, NULL) == 0);
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delete gp;
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assert(wait(&status) == -1);
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assert(errno == ECHILD);
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}
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return retval;
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}
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