| /* sprintf.c */ |
| |
| /* |
| * Copyright (c) 1997-2010, 2013-2014 Wind River Systems, Inc. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <zephyr/sys/cbprintf.h> |
| |
| struct emitter { |
| char *ptr; |
| int len; |
| }; |
| |
| static int sprintf_out(int c, struct emitter *p) |
| { |
| if (p->len > 1) { /* need to reserve a byte for EOS */ |
| *(p->ptr) = c; |
| p->ptr += 1; |
| p->len -= 1; |
| } |
| return 0; /* indicate keep going so we get the total count */ |
| } |
| |
| int snprintf(char *ZRESTRICT str, size_t len, |
| const char *ZRESTRICT format, ...) |
| { |
| va_list vargs; |
| |
| struct emitter p; |
| int r; |
| char dummy; |
| |
| if (len == 0) { |
| str = &dummy; /* write final NUL to dummy, can't change *s */ |
| } |
| |
| p.ptr = str; |
| p.len = (int) len; |
| |
| va_start(vargs, format); |
| r = cbvprintf(sprintf_out, (void *) (&p), format, vargs); |
| va_end(vargs); |
| |
| *(p.ptr) = 0; |
| return r; |
| } |
| |
| int sprintf(char *ZRESTRICT str, const char *ZRESTRICT format, ...) |
| { |
| va_list vargs; |
| |
| struct emitter p; |
| int r; |
| |
| p.ptr = str; |
| p.len = (int) 0x7fffffff; /* allow up to "maxint" characters */ |
| |
| va_start(vargs, format); |
| r = cbvprintf(sprintf_out, (void *) (&p), format, vargs); |
| va_end(vargs); |
| |
| *(p.ptr) = 0; |
| return r; |
| } |
| |
| int vsnprintf(char *ZRESTRICT str, size_t len, |
| const char *ZRESTRICT format, va_list vargs) |
| { |
| struct emitter p; |
| int r; |
| char dummy; |
| |
| if (len == 0) { |
| str = &dummy; /* write final NUL to dummy, can't change * *s */ |
| } |
| |
| p.ptr = str; |
| p.len = (int) len; |
| |
| r = cbvprintf(sprintf_out, (void *) (&p), format, vargs); |
| |
| *(p.ptr) = 0; |
| return r; |
| } |
| |
| int vsprintf(char *ZRESTRICT str, const char *ZRESTRICT format, |
| va_list vargs) |
| { |
| struct emitter p; |
| int r; |
| |
| p.ptr = str; |
| p.len = (int) 0x7fffffff; /* allow up to "maxint" characters */ |
| |
| r = cbvprintf(sprintf_out, (void *) (&p), format, vargs); |
| |
| *(p.ptr) = 0; |
| return r; |
| } |