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Rewrite simple-offsets.js in C/C++

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This commit is contained in:
Vitaliy Filippov
2021-11-19 02:39:56 +03:00
parent d3903f039c
commit cd21ff0b6a
6 changed files with 198 additions and 26 deletions
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src/cli_create.cpp
+33 -24
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@@ -94,6 +94,11 @@ struct image_creator_t
goto resume_2;
else if (state == 3)
goto resume_3;
if (!size)
{
fprintf(stderr, "Image size is missing\n");
exit(1);
}
for (auto & ic: parent->cli->st_cli.inode_config)
{
if (ic.second.name == image_name)
@@ -432,6 +437,31 @@ resume_3:
}
};
uint64_t parse_size(std::string size_str)
{
uint64_t mul = 1;
char type_char = tolower(size_str[size_str.length()-1]);
if (type_char == 'k' || type_char == 'm' || type_char == 'g' || type_char == 't')
{
if (type_char == 'k')
mul = 1l<<10;
else if (type_char == 'm')
mul = 1l<<20;
else if (type_char == 'g')
mul = 1l<<30;
else /*if (type_char == 't')*/
mul = 1l<<40;
size_str = size_str.substr(0, size_str.length()-1);
}
uint64_t size = json11::Json(size_str).uint64_value() * mul;
if (size == 0 && size_str != "0")
{
fprintf(stderr, "Invalid syntax for size: %s\n", size_str.c_str());
exit(1);
}
return size;
}
std::function<bool(void)> cli_tool_t::start_create(json11::Json cfg)
{
json11::Json::array cmd = cfg["command"].array_items();
@@ -458,33 +488,12 @@ std::function<bool(void)> cli_tool_t::start_create(json11::Json cfg)
image_creator->new_parent = cfg["parent"].string_value();
if (cfg["size"].string_value() != "")
{
std::string size_str = cfg["size"].string_value();
uint64_t mul = 1;
char type_char = tolower(size_str[size_str.length()-1]);
if (type_char == 'k' || type_char == 'm' || type_char == 'g' || type_char == 't')
image_creator->size = parse_size(cfg["size"].string_value());
if (image_creator->size % 4096)
{
if (type_char == 'k')
mul = 1l<<10;
else if (type_char == 'm')
mul = 1l<<20;
else if (type_char == 'g')
mul = 1l<<30;
else /*if (type_char == 't')*/
mul = 1l<<40;
size_str = size_str.substr(0, size_str.length()-1);
}
uint64_t size = json11::Json(size_str).uint64_value() * mul;
if (size == 0)
{
fprintf(stderr, "Invalid syntax for size: %s\n", cfg["size"].string_value().c_str());
fprintf(stderr, "Size should be a multiple of 4096\n");
exit(1);
}
if (size % 4096)
{
fprintf(stderr, "Image size should be a multiple of 4096\n");
exit(1);
}
image_creator->size = size;
if (image_creator->new_snap != "")
{
fprintf(stderr, "--size can't be specified for snapshots\n");