| // Copyright 2016 The Fuchsia Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <printf.h> |
| |
| #include <efi.h> |
| #include <efilib.h> |
| #include <utils.h> |
| |
| #define PCBUFMAX 126 |
| // buffer is two larger to leave room for a \0 and room |
| // for a \r that may be added after a \n |
| |
| typedef struct { |
| int off; |
| CHAR16 buf[PCBUFMAX + 2]; |
| } _pcstate; |
| |
| static int _printf_console_out(const char* str, size_t len, void* _state) { |
| _pcstate* state = _state; |
| CHAR16* buf = state->buf; |
| int i = state->off; |
| int n = len; |
| while (n > 0) { |
| if (*str == '\n') { |
| buf[i++] = '\r'; |
| } |
| buf[i++] = *str++; |
| if (i >= PCBUFMAX) { |
| buf[i] = 0; |
| gConOut->OutputString(gConOut, buf); |
| i = 0; |
| } |
| n--; |
| } |
| state->off = i; |
| return len; |
| } |
| |
| int _printf(const char* fmt, ...) { |
| va_list ap; |
| _pcstate state; |
| int r; |
| state.off = 0; |
| va_start(ap, fmt); |
| r = _printf_engine(_printf_console_out, &state, fmt, ap); |
| va_end(ap); |
| if (state.off) { |
| state.buf[state.off] = 0; |
| gConOut->OutputString(gConOut, state.buf); |
| } |
| return r; |
| } |