From ca72bdfec2457b035836bc43afbc5ea20fe8af02 Mon Sep 17 00:00:00 2001 From: =?utf-8?q?Ludovic=20Court=C3=A8s?= Date: Sat, 22 Nov 2008 15:48:16 +0100 Subject: [PATCH] Add C unit test for `scm_c_read ()' and the port API. * test-suite/standalone/Makefile.am (check_PROGRAMS, TESTS): Add `test-scm-c-read'. (test_scm_c_read_SOURCES, test_scm_c_read_CFLAGS, test_scm_c_read_LDADD): New. --- test-suite/standalone/.gitignore | 1 + test-suite/standalone/Makefile.am | 7 ++ test-suite/standalone/test-scm-c-read.c | 130 +++++++++++++++++++++++++++++++ 3 files changed, 138 insertions(+), 0 deletions(-) create mode 100644 test-suite/standalone/test-scm-c-read.c diff --git a/test-suite/standalone/.gitignore b/test-suite/standalone/.gitignore index 78af304..b1f4088 100644 --- a/test-suite/standalone/.gitignore +++ b/test-suite/standalone/.gitignore @@ -7,3 +7,4 @@ /test-with-guile-module /test-use-srfi /test-scm-with-guile +/test-scm-c-read diff --git a/test-suite/standalone/Makefile.am b/test-suite/standalone/Makefile.am index 6ae5e88..3afd7e5 100644 --- a/test-suite/standalone/Makefile.am +++ b/test-suite/standalone/Makefile.am @@ -107,6 +107,13 @@ TESTS += test-conversion check_SCRIPTS += test-use-srfi TESTS += test-use-srfi +# test-scm-c-read +test_scm_c_read_SOURCES = test-scm-c-read.c +test_scm_c_read_CFLAGS = ${test_cflags} +test_scm_c_read_LDADD = ${top_builddir}/libguile/libguile.la +check_PROGRAMS += test-scm-c-read +TESTS += test-scm-c-read + if BUILD_PTHREAD_SUPPORT # test-with-guile-module diff --git a/test-suite/standalone/test-scm-c-read.c b/test-suite/standalone/test-scm-c-read.c new file mode 100644 index 0000000..be8ea80 --- /dev/null +++ b/test-suite/standalone/test-scm-c-read.c @@ -0,0 +1,130 @@ +/* Copyright (C) 2008 Free Software Foundation, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* Exercise `scm_c_read ()' and the port type API. Verify assumptions that + can be made by port type implementations. */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include +#include + + + +/* Size of our port's internal buffer. */ +#define PORT_BUFFER_SIZE 1024 + +/* Return a new port of type PORT_TYPE. */ +static inline SCM +make_port (scm_t_bits port_type) +{ + SCM port; + char *c_buffer; + scm_t_port *c_port; + + c_buffer = scm_gc_calloc (PORT_BUFFER_SIZE, "custom-port-buffer"); + + port = scm_new_port_table_entry (port_type); + + /* Attach it the underlying u8vector, which we'll use as PORT's buffer. */ + SCM_SETSTREAM (port, (scm_t_bits) c_buffer); + + /* Have the port directly access the buffer (bytevector). */ + c_port = SCM_PTAB_ENTRY (port); + c_port->read_pos = c_port->read_buf = (unsigned char *) c_buffer; + c_port->read_end = (unsigned char *) c_buffer + PORT_BUFFER_SIZE; + c_port->read_buf_size = PORT_BUFFER_SIZE; + + /* Mark PORT as open and readable. */ + SCM_SET_CELL_TYPE (port, port_type | SCM_OPN | SCM_RDNG); + + return port; +} + +/* Read one byte from PORT. */ +static int +fill_input (SCM port) +{ + int result; + scm_t_port *c_port = SCM_PTAB_ENTRY (port); + + /* Make sure that C_PORT's internal buffer wasn't changed behind our back. + See http://lists.gnu.org/archive/html/guile-devel/2008-11/msg00042.html + for an example where this assumption matters. */ + assert (c_port->read_buf == (unsigned char *) SCM_STREAM (port)); + assert (c_port->read_buf_size == PORT_BUFFER_SIZE); + + if (c_port->read_pos >= c_port->read_end) + result = EOF; + else + result = (int) *c_port->read_pos++; + + return result; +} + +/* Return true (non-zero) if BUF contains only zeros. */ +static inline int +zeroed_buffer_p (const char *buf, size_t len) +{ + size_t i; + + for (i = 0; i < len; i++) + if (buf[i] != 0) + return 0; + + return 1; +} + +/* Run the test. */ +static void * +do_start (void *arg) +{ + SCM port; + scm_t_bits port_type; + char buffer[PORT_BUFFER_SIZE + (PORT_BUFFER_SIZE / 2)]; + size_t read, last_read; + + port_type = scm_make_port_type ("custom-input-port", fill_input, NULL); + port = make_port (port_type); + + read = 0; + do + { + last_read = scm_c_read (port, &buffer[read], 123); + assert (last_read <= 123); + assert (zeroed_buffer_p (&buffer[read], last_read)); + + read += last_read; + } + while (last_read > 0 && read < sizeof (buffer)); + + /* We shouldn't be able to read more than what's in PORT's buffer. */ + assert (read == PORT_BUFFER_SIZE); + + return NULL; +} + + +int +main (int argc, char *argv[]) +{ + scm_with_guile (do_start, NULL); + + return 0; +} -- 1.6.0.3