| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/vtxprintf.h> |
| #include <string.h> |
| #include <trace.h> |
| |
| struct vsnprintf_context { |
| char *str_buf; |
| size_t buf_limit; |
| }; |
| |
| static void str_tx_byte(unsigned char byte, void *data) |
| { |
| struct vsnprintf_context *ctx = data; |
| if (ctx->buf_limit) { |
| *ctx->str_buf = byte; |
| ctx->str_buf++; |
| ctx->buf_limit--; |
| } |
| } |
| |
| int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) |
| { |
| int i; |
| struct vsnprintf_context ctx; |
| |
| DISABLE_TRACE; |
| |
| ctx.str_buf = buf; |
| ctx.buf_limit = size ? size - 1 : 0; |
| i = vtxprintf(str_tx_byte, fmt, args, &ctx); |
| if (size) |
| *ctx.str_buf = '\0'; |
| |
| ENABLE_TRACE; |
| |
| return i; |
| } |
| |
| int snprintf(char *buf, size_t size, const char *fmt, ...) |
| { |
| va_list args; |
| int i; |
| |
| va_start(args, fmt); |
| i = vsnprintf(buf, size, fmt, args); |
| va_end(args); |
| |
| return i; |
| } |