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base: avoid use of deprecated base/printf.h

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Besides adapting the components to the use of base/log.h, the patch
cleans up a few base headers, i.e., it removes unused includes from
root/component.h, specifically base/heap.h and
ram_session/ram_session.h. Hence, components that relied on the implicit
inclusion of those headers have to manually include those headers now.

While adjusting the log messages, I repeatedly stumbled over the problem
that printing char * arguments is ambiguous. It is unclear whether to
print the argument as pointer or null-terminated string. To overcome
this problem, the patch introduces a new type 'Cstring' that allows the
caller to express that the argument should be handled as null-terminated
string. As a nice side effect, with this type in place, the optional len
argument of the 'String' class could be removed. Instead of supplying a
pair of (char const *, size_t), the constructor accepts a 'Cstring'.
This, in turn, clears the way let the 'String' constructor use the new
output mechanism to assemble a string from multiple arguments (and
thereby getting rid of snprintf within Genode in the near future).

To enforce the explicit resolution of the char * ambiguity, the 'char *'
overload of the 'print' function is marked as deleted.

Issue #1987
This commit is contained in:
Norman Feske
2016-07-13 19:07:09 +02:00
committed by Christian Helmuth
parent a5d3aa8373
commit 17c79a9e23
699 changed files with 5156 additions and 5865 deletions
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10
repos/os/include/framebuffer_session/framebuffer_session.h
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@ -14,6 +14,7 @@
#ifndef _INCLUDE__FRAMEBUFFER_SESSION__FRAMEBUFFER_SESSION_H_
#define _INCLUDE__FRAMEBUFFER_SESSION__FRAMEBUFFER_SESSION_H_
#include <base/output.h>
#include <base/signal.h>
#include <dataspace/capability.h>
#include <session/session.h>
@ -64,6 +65,15 @@ struct Framebuffer::Mode
*/
Genode::size_t bytes_per_pixel() const {
return bytes_per_pixel(_format); }
void print(Genode::Output &out) const
{
Genode::print(out, _width, "x", _height, "@");
switch (_format) {
case RGB565: Genode::print(out, "RGB565"); break;
default: Genode::print(out, "INVALID"); break;
}
}
};