forked from ROMEO/fsw-ws
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#include "xil_printf.h"
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#include "xparameters.h"
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#include "../hardware/interface_access.h"
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#include "../hardware/interface_fds.h"
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#include <errno.h>
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#include <reent.h>
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#include <unistd.h>
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int write(int fd, const void *ptr, size_t len) {
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if (ptr == NULL) {
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// _REENT_ERRNO(_REENT) = EINVAL;
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return -1;
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}
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//TODO check len
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// 0 is stdin, do not write to it
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if (fd < 1) {
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// _REENT_ERRNO(_REENT) = EBADF;
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return -1;
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}
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// we only support a single debug UART, so
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// stdout and stderr are the same and go to the xilinx stdout UART
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// We output directely to avoid loops and allow debugging (not via a write)
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if (fd < 3) {
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size_t todo;
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const char *data = ptr;
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for (todo = 0; todo < len; todo++) {
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outbyte(*data++);
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}
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return len;
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}
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if (fd < INTERFACE_FDS_NEXT) {
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int result = hw_interface_write(fd, ptr, len);
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if (result >= 0) {
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return result;
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// } else if (_REENT_ERRNO(_REENT) != EBADF) {
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// return result;
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}
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// continue if fd did not match to try other fd providers
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}
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// we do not have dynamic fds, so fd is invalid
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// _REENT_ERRNO(_REENT) = EBADF;
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return -1;
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}
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