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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /support/dktools/dk4svbuf.ctr
Initial commit
Diffstat (limited to 'support/dktools/dk4svbuf.ctr')
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diff --git a/support/dktools/dk4svbuf.ctr b/support/dktools/dk4svbuf.ctr
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+%% options
+
+copyright owner = Dirk Krause
+copyright year = 2016-xxxx
+license = bsd
+
+%% header
+
+/** @file dk4svbuf.h File buffering.
+*/
+
+#ifndef DK4CONF_H_INCLUDED
+#include "dk4conf.h"
+#endif
+
+#ifndef STDIO_H_INCLUDED
+#include <stdio.h>
+#define STDIO_H_INCLUDED 1
+#endif
+
+#ifndef DK4ERROR_H_INCLUDED
+#include "dk4error.h"
+#endif
+
+/** How to buffer a file.
+*/
+typedef enum {
+ DK4_FILE_NO_BUFFERING = 0 , /**< Do not use buffers. */
+ DK4_FILE_LINE_BUFFERING , /**< Buffer lines. */
+ DK4_FILE_FULL_BUFFERING /**< Full buffering. */
+} dk4_file_buffering_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Set up buffering for a file.
+ @param fipo File to modify.
+ @param tp Buffering type.
+ @param pbuf Start address of buffer to use, may be NULL.
+ @param szbuf Size of buffer, may be 0.
+ @param erp Error report, may be NULL.
+ @return 1 on success, 0 on error.
+*/
+int
+dk4setvbuf(
+ FILE *fipo,
+ dk4_file_buffering_t tp,
+ char *pbuf,
+ size_t szbuf,
+ dk4_er_t *erp
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+/* vim: set ai sw=4 ts=4 : */
+%% module
+
+
+#include "dk4svbuf.h"
+
+
+$!trace-include
+
+
+
+/** Buffering type constants.
+*/
+static int buffering_types[] = {
+ _IONBF, _IOLBF, _IOFBF
+};
+
+
+int
+dk4setvbuf(
+ FILE *fipo,
+ dk4_file_buffering_t tp,
+ char *pbuf,
+ size_t szbuf,
+ dk4_er_t *erp
+)
+{
+ int back = 0;
+#if DK4_HAVE_SETVBUF
+ int svbres = 0;
+#endif
+ int btp;
+
+ if (NULL != fipo) {
+ btp = (
+ ((0 <= (int)tp) && (3 > (int)tp))
+ ? (buffering_types[(int)tp])
+ : (buffering_types[2])
+ );
+#if DK4_HAVE_SETVBUF
+ svbres = setvbuf(
+ fipo,
+ ((0 < szbuf) ? (pbuf) : (NULL)),
+ (((NULL != pbuf) && (0 < szbuf)) ? (btp) : (buffering_types[0])),
+ szbuf
+ );
+ if (0 == svbres) {
+ back = 1;
+ }
+ else {
+ dk4error_set_simple_error_code(erp, DK4_E_SYSTEM);
+ }
+#else
+#if DK4_HAVE_SETBUFFER
+ setbuffer(fipo, pbuf, szbuf);
+ back = 1;
+#else
+ back = 1;
+ dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
+#endif
+#endif
+ }
+ else {
+ dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
+ }
+ return back;
+}
+
+/* vim: set ai sw=4 ts=4 : */
+