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authormidipix <writeonce@midipix.org>2018-07-15 08:20:34 -0400
committermidipix <writeonce@midipix.org>2018-07-15 11:01:59 -0400
commit2358806aa095d5c79a17ab9da01243506fca8016 (patch)
tree76f31ea430b9046f2dd03c16a1150c98965efb55 /src/internal
parentaf27dfdd0ae13b638a472ce834e5fccd718a84ca (diff)
downloadptycon-2358806aa095d5c79a17ab9da01243506fca8016.tar.bz2
ptycon-2358806aa095d5c79a17ab9da01243506fca8016.tar.xz
internals: added ptyc_dprintf(), a signal-resilient dprintf implementation.
Diffstat (limited to 'src/internal')
-rw-r--r--src/internal/ptycon_dprintf_impl.c62
-rw-r--r--src/internal/ptycon_dprintf_impl.h6
2 files changed, 68 insertions, 0 deletions
diff --git a/src/internal/ptycon_dprintf_impl.c b/src/internal/ptycon_dprintf_impl.c
new file mode 100644
index 0000000..8589854
--- /dev/null
+++ b/src/internal/ptycon_dprintf_impl.c
@@ -0,0 +1,62 @@
+#include <ntapi/ntapi.h>
+#include <psxabi/sys_sysapi.h>
+#include <psxabi/sys_errno.h>
+
+#include <ptycon/ptycon.h>
+#include "ptycon_driver_impl.h"
+#include "ptycon_nolibc_impl.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int ptyc_dprintf(int fd, const char * fmt, ...)
+{
+ int ret;
+ int cnt;
+ int size;
+ va_list ap;
+ char * ch;
+ char * buf;
+ char chbuf[2048];
+
+ va_start(ap,fmt);
+
+ size = sizeof(chbuf);
+ buf = ((cnt = ntapi->vsnprintf(chbuf,size,fmt,ap)) < size)
+ ? chbuf : calloc(1, cnt + 1);
+
+ va_end(ap);
+
+ if (buf == chbuf) {
+ (void)0;
+
+ } else if (buf) {
+ va_start(ap,fmt);
+ ntapi->vsprintf(buf,fmt,ap);
+ va_end(ap);
+
+ } else {
+ return -1;
+ }
+
+ ret = 0;
+ ch = buf;
+
+ for (; cnt && ret>=0; ) {
+ ret = ptyc_write(fd,ch,cnt);
+
+ while ((ret == NT_STATUS_ALERTED) || (ret == NT_STATUS_USER_APC))
+ ret = ptyc_write(fd,ch,cnt);
+
+ ch += ret;
+ cnt -= ret;
+ }
+
+ ret = (ret < 0) ? -1 : ch - buf;
+
+ if (buf != chbuf)
+ free(buf);
+
+ return ret;
+}
diff --git a/src/internal/ptycon_dprintf_impl.h b/src/internal/ptycon_dprintf_impl.h
new file mode 100644
index 0000000..495b787
--- /dev/null
+++ b/src/internal/ptycon_dprintf_impl.h
@@ -0,0 +1,6 @@
+#ifndef PTYCON_DPRINTF_IMPL_H
+#define PTYCON_DPRINTF_IMPL_H
+
+int ptyc_dprintf(int fd, const char * fmt, ...);
+
+#endif