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shellwindow: fix line reading code

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In case of partially read lines, the last complete line before was
discarded. Fix this, simplify the code and make it code work at all
for lines longer than 1023 bytes (went into endless loop before).


Origin commit data
------------------
Commit: 27124e72e1
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2015-02-01 (Sun, 01 Feb 2015)

Origin message was:
------------------
shellwindow: fix line reading code

In case of partially read lines, the last complete line before was
discarded. Fix this, simplify the code and make it code work at all
for lines longer than 1023 bytes (went into endless loop before).
This commit is contained in:
Stefan Seyfried
2015-02-01 20:11:02 +01:00
committed by Jacek Jendrzej
parent eb1d033730
commit 52fbb87595
1 changed files with 15 additions and 16 deletions
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31
src/gui/widget/shellwindow.cpp
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@@ -82,27 +82,26 @@ CShellWindow::CShellWindow(const std::string &command, const int _mode, int *res
struct timeval tv;
gettimeofday(&tv,NULL);
uint64_t lastPaint = (uint64_t) tv.tv_usec + (uint64_t)((uint64_t) tv.tv_sec * (uint64_t) 1000000);
bool ok = true, nlseen = false, dirty = false, pushed = false;
bool ok = true, nlseen = false, dirty = false, incomplete = false;
char output[1024];
int off = 0;
std::string txt = "";
std::string line = "";
do {
uint64_t now;
fds.revents = 0;
int r = poll(&fds, 1, 300);
if (r > 0) {
if (!feof(f)) {
gettimeofday(&tv,NULL);
now = (uint64_t) tv.tv_usec + (uint64_t)((uint64_t) tv.tv_sec * (uint64_t) 1000000);
unsigned int lines_read = 0;
while (fgets(output + off, sizeof(output) - off, f)) {
char *outputp = output + off;
while (fgets(output, sizeof(output), f)) {
char *outputp = output;
dirty = true;
for (int i = off; output[i] && !nlseen; i++)
for (int i = 0; output[i] && !nlseen; i++)
switch (output[i]) {
case '\b':
if (outputp > output)
@@ -124,26 +123,26 @@ CShellWindow::CShellWindow(const std::string &command, const int _mode, int *res
if (outputp < output + sizeof(output))
*outputp = 0;
line += std::string(output);
if (incomplete)
lines.pop_back();
if (nlseen) {
pushed = false;
lines.push_back(line);
line.clear();
nlseen = false;
off = 0;
incomplete = false;
} else {
off = strlen(output);
if (pushed)
lines.pop_back();
lines.push_back(line);
incomplete = true;
}
lines.push_back(std::string((output)));
pushed = true;
if (lines.size() > lines_max)
lines.pop_front();
txt = "";
bool first = true;
for (std::list<std::string>::const_iterator it = lines.begin(), end = lines.end(); it != end; ++it) {
if (first)
first = false;
else
if (!first)
txt += '\n';
first = false;
txt += *it;
}
if (((lines_read == lines_max) && (lastPaint + 100000 < now)) || (lastPaint + 250000 < now)) {