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