*
* Floating point read/write functions.
*
- * Copyright (c) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * 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.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
*
- * 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
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
* Reference: ISO C99 standard 5.2.4
*/
/*
* Aliasing float/double and unsigned long is not strictly permitted by strict
- * aliasing, but in practice type prunning is well supported, and this permits
+ * aliasing, but in practice declaration prunning is well supported, and this permits
* us to use per-word read/writes rather than per-byte.
*/
#endif
};
+static struct declaration_float *static_ldouble_declaration;
+
struct pos_len {
size_t sign_start, exp_start, mantissa_start, len;
};
void _ctf_float_copy(struct stream_pos *destp,
- const struct type_class_float *dest_class,
+ struct definition_float *dest_definition,
struct stream_pos *srcp,
- const struct type_class_float *src_class)
+ const struct definition_float *src_definition)
{
- uint8_t sign;
- int64_t exp;
- uint64_t mantissa;
-
/* Read */
- if (src->byte_order == LITTLE_ENDIAN) {
- mantissa = ctf_bitfield_unsigned_read(srcp,
- src_class->mantissa);
- exp = ctf_bitfield_signed_read(srcp, src_class->exp);
- sign = ctf_bitfield_unsigned_read(srcp, src_class->sign);
+ if (src_definition->declaration->byte_order == LITTLE_ENDIAN) {
+ ctf_integer_read(srcp, &src_definition->mantissa->p);
+ ctf_integer_read(srcp, &src_definition->exp->p);
+ ctf_integer_read(srcp, &src_definition->sign->p);
} else {
- sign = ctf_bitfield_unsigned_read(srcp, src_class->sign);
- exp = ctf_bitfield_signed_read(srcp, src_class->exp);
- mantissa = ctf_bitfield_unsigned_read(srcp,
- src_class->mantissa);
+ ctf_integer_read(srcp, &src_definition->sign->p);
+ ctf_integer_read(srcp, &src_definition->exp->p);
+ ctf_integer_read(srcp, &src_definition->mantissa->p);
}
+
+ dest_definition->mantissa->value._unsigned =
+ src_definition->mantissa->value._unsigned;
+ dest_definition->exp->value._signed =
+ src_definition->exp->value._signed;
+ dest_definition->sign->value._unsigned =
+ src_definition->sign->value._unsigned;
+
/* Write */
- if (dest->byte_order == LITTLE_ENDIAN) {
- ctf_bitfield_unsigned_write(destp, dest_class->mantissa,
- mantissa);
- ctf_bitfield_signed_write(destp, dest_class->exp, exp);
- ctf_bitfield_unsigned_write(destp, dest_class->sign, sign);
+ if (dest_definition->declaration->byte_order == LITTLE_ENDIAN) {
+ ctf_integer_write(destp, &dest_definition->mantissa->p);
+ ctf_integer_write(destp, &dest_definition->exp->p);
+ ctf_integer_write(destp, &dest_definition->sign->p);
} else {
- ctf_bitfield_unsigned_write(destp, dest_class->sign, sign);
- ctf_bitfield_signed_write(destp, dest_class->exp, exp);
- ctf_bitfield_unsigned_write(destp, dest_class->mantissa,
- mantissa);
+ ctf_integer_write(destp, &dest_definition->sign->p);
+ ctf_integer_write(destp, &dest_definition->exp->p);
+ ctf_integer_write(destp, &dest_definition->mantissa->p);
}
}
-void ctf_float_copy(struct stream_pos *dest, struct stream_pos *src,
- const struct type_class_float *float_class)
+void ctf_float_read(struct stream_pos *ppos, struct definition *definition)
{
- align_pos(src, float_class->p.alignment);
- align_pos(dest, float_class->p.alignment);
- _ctf_float_copy(dest, float_class, src, float_class);
-}
-
-double ctf_double_read(struct stream_pos *srcp,
- const struct type_class_float *float_class)
-{
- union doubleIEEE754 u;
- struct ctf_float *dest_class = float_type_new(NULL,
- DBL_MANT_DIG,
- sizeof(double) * CHAR_BIT - DBL_MANT_DIG,
- BYTE_ORDER,
- __alignof__(double));
- struct stream_pos destp;
-
- align_pos(srcp, float_class->p.alignment);
- init_pos(&destp, &u.bits);
- _ctf_float_copy(&destp, dest_class, srcp, float_class);
- float_type_free(dest_class);
- return u.v;
+ struct definition_float *float_definition =
+ container_of(definition, struct definition_float, p);
+ const struct declaration_float *float_declaration =
+ float_definition->declaration;
+ struct ctf_stream_pos *pos = ctf_pos(ppos);
+ union ldoubleIEEE754 u;
+ struct definition *tmpdef =
+ static_ldouble_declaration->p.definition_new(&static_ldouble_declaration->p,
+ NULL, 0, 0);
+ struct definition_float *tmpfloat =
+ container_of(tmpdef, struct definition_float, p);
+ struct ctf_stream_pos destp;
+
+ ctf_init_pos(&destp, -1, O_WRONLY);
+ destp.base = (char *) u.bits;
+
+ ctf_align_pos(pos, float_declaration->p.alignment);
+ _ctf_float_copy(&destp.parent, tmpfloat, ppos, float_definition);
+ float_definition->value = u.v;
+ definition_unref(tmpdef);
}
-void ctf_double_write(struct stream_pos *destp,
- const struct type_class_float *float_class,
- double v)
+void ctf_float_write(struct stream_pos *ppos, struct definition *definition)
{
- union doubleIEEE754 u;
- struct ctf_float *src_class = float_type_new(NULL,
- DBL_MANT_DIG,
- sizeof(double) * CHAR_BIT - DBL_MANT_DIG,
- BYTE_ORDER,
- __alignof__(double));
- struct stream_pos srcp;
-
- u.v = v;
- align_pos(destp, float_class->p.alignment);
- init_pos(&srcp, &u.bits);
- _ctf_float_copy(destp, float_class, &srcp, src_class);
- float_type_free(src_class);
+ struct definition_float *float_definition =
+ container_of(definition, struct definition_float, p);
+ const struct declaration_float *float_declaration =
+ float_definition->declaration;
+ struct ctf_stream_pos *pos = ctf_pos(ppos);
+ union ldoubleIEEE754 u;
+ struct definition *tmpdef =
+ static_ldouble_declaration->p.definition_new(&static_ldouble_declaration->p,
+ NULL, 0, 0);
+ struct definition_float *tmpfloat =
+ container_of(tmpdef, struct definition_float, p);
+ struct ctf_stream_pos srcp;
+
+ ctf_init_pos(&srcp, -1, O_RDONLY);
+ srcp.base = (char *) u.bits;
+
+ u.v = float_definition->value;
+ ctf_align_pos(pos, float_declaration->p.alignment);
+ _ctf_float_copy(ppos, float_definition, &srcp.parent, tmpfloat);
+ definition_unref(tmpdef);
}
-long double ctf_ldouble_read(struct stream_pos *srcp,
- const struct type_class_float *float_class)
+void __attribute__((constructor)) ctf_float_init(void)
{
- union ldoubleIEEE754 u;
- struct ctf_float *dest_class = float_type_new(NULL,
- LDBL_MANT_DIG,
+ static_ldouble_declaration =
+ float_declaration_new(LDBL_MANT_DIG,
sizeof(long double) * CHAR_BIT - LDBL_MANT_DIG,
BYTE_ORDER,
__alignof__(long double));
- struct stream_pos destp;
-
- align_pos(srcp, float_class->p.alignment);
- init_pos(&destp, &u.bits);
- _ctf_float_copy(&destp, dest_class, srcp, float_class);
- float_type_free(dest_class);
- return u.v;
}
-void ctf_ldouble_write(struct stream_pos *destp,
- const struct type_class_float *float_class,
- long double v)
+void __attribute__((destructor)) ctf_float_fini(void)
{
- union ldoubleIEEE754 u;
- struct ctf_float *src_class = float_type_new(NULL,
- LDBL_MANT_DIG,
- sizeof(long double) * CHAR_BIT - LDBL_MANT_DIG,
- BYTE_ORDER,
- __alignof__(long double));
- struct stream_pos srcp;
-
- u.v = v;
- align_pos(destp, float_class->p.alignment);
- init_pos(&srcp, &u.bits);
- _ctf_float_copy(destp, float_class, &srcp, src_class);
- float_type_free(src_class);
+ declaration_unref(&static_ldouble_declaration->p);
}
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