X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=include%2Fbabeltrace%2Fctf%2Ftypes.h;h=8f9bf992e9d49e18360e09f976d72a4636585f85;hb=8c572eba034b95716a4bbd019dfbe0827605ba90;hp=40b89847d759ec6bb410e56cd65b5461982804c5;hpb=a52d7f6a6dfe8c55b65eef0996b848873db39fe7;p=babeltrace.git diff --git a/include/babeltrace/ctf/types.h b/include/babeltrace/ctf/types.h index 40b89847..8f9bf992 100644 --- a/include/babeltrace/ctf/types.h +++ b/include/babeltrace/ctf/types.h @@ -6,26 +6,53 @@ * * Type header * - * Copyright (c) 2010 Mathieu Desnoyers + * Copyright 2010 - Mathieu Desnoyers * - * 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. */ +#include +#include +#include #include +#include #include +struct packet_index { + off_t offset; /* offset of the packet in the file, in bytes */ + size_t packet_size; /* packet size, in bits */ + size_t content_size; /* content size, in bits */ +}; + +/* + * Always update stream_pos with move_pos and init_pos. + */ +struct stream_pos { + int fd; /* backing file fd. -1 if unset. */ + GArray *packet_index; /* contains struct packet_index */ + int prot; /* mmap protection */ + int flags; /* mmap flags */ + + /* Current position */ + off_t mmap_offset; /* mmap offset in the file, in bytes */ + size_t packet_size; /* current packet size, in bits */ + size_t content_size; /* current content size, in bits */ + uint32_t *content_size_loc; /* pointer to current content size */ + char *base; /* mmap base address */ + size_t offset; /* offset from base, in bits */ + size_t cur_index; /* current index in packet index */ + + int dummy; /* dummy position, for length calculation */ +}; + /* * IMPORTANT: All lengths (len) and offsets (start, end) are expressed in bits, * *not* in bytes. @@ -36,52 +63,128 @@ */ uint64_t ctf_uint_read(struct stream_pos *pos, - const struct type_class_integer *int_class); + const struct declaration_integer *integer_declaration); int64_t ctf_int_read(struct stream_pos *pos, - const struct type_class_integer *int_class); + const struct declaration_integer *integer_declaration); void ctf_uint_write(struct stream_pos *pos, - const struct type_class_integer *int_class, + const struct declaration_integer *integer_declaration, uint64_t v); void ctf_int_write(struct stream_pos *pos, - const struct type_class_integer *int_class, + const struct declaration_integer *integer_declaration, int64_t v); -uint64_t ctf_bitfield_unsigned_read(struct stream_pos *pos, - const struct type_class_bitfield *bitfield_class); -int64_t ctf_bitfield_signed_read(struct stream_pos *pos, - const struct type_class_bitfield *bitfield_class); -void ctf_bitfield_unsigned_write(struct stream_pos *pos, - const struct type_class_bitfield *bitfield_class, - uint64_t v); -void ctf_bitfield_signed_write(struct stream_pos *pos, - const struct type_class_bitfield *bitfield_class, - int64_t v); - double ctf_double_read(struct stream_pos *pos, - const struct type_class_float *src); + const struct declaration_float *src); void ctf_double_write(struct stream_pos *pos, - const struct type_class_float *dest, + const struct declaration_float *dest, double v); long double ctf_ldouble_read(struct stream_pos *pos, - const struct type_class_float *src); + const struct declaration_float *src); void ctf_ldouble_write(struct stream_pos *pos, - const struct type_class_float *dest, + const struct declaration_float *dest, long double v); -void ctf_float_copy(struct stream_pos *destp, const struct type_class_float *dest, - struct stream_pos *srcp, const struct type_class_float *src); +void ctf_float_copy(struct stream_pos *destp, + struct stream_pos *srcp, + const struct declaration_float *float_declaration); void ctf_string_copy(struct stream_pos *dest, struct stream_pos *src, - const struct type_class_string *string_class); -void ctf_string_read(unsigned char **dest, struct stream_pos *src, - const struct type_class_string *string_class); -void ctf_string_write(struct stream_pos *dest, const unsigned char *src, - const struct type_class_string *string_class); -void ctf_string_free_temp(unsigned char *string); - -GQuark ctf_enum_read(struct stream_pos *pos, - const struct type_class_enum *src); + const struct declaration_string *string_declaration); +void ctf_string_read(char **dest, struct stream_pos *src, + const struct declaration_string *string_declaration); +void ctf_string_write(struct stream_pos *dest, const char *src, + const struct declaration_string *string_declaration); +void ctf_string_free_temp(char *string); + +GArray *ctf_enum_read(struct stream_pos *pos, + const struct declaration_enum *src); void ctf_enum_write(struct stream_pos *pos, - const struct type_class_enum *dest, + const struct declaration_enum *dest, GQuark q); +void ctf_struct_begin(struct stream_pos *pos, + const struct declaration_struct *struct_declaration); +void ctf_struct_end(struct stream_pos *pos, + const struct declaration_struct *struct_declaration); +void ctf_variant_begin(struct stream_pos *pos, + const struct declaration_variant *variant_declaration); +void ctf_variant_end(struct stream_pos *pos, + const struct declaration_variant *variant_declaration); +void ctf_array_begin(struct stream_pos *pos, + const struct declaration_array *array_declaration); +void ctf_array_end(struct stream_pos *pos, + const struct declaration_array *array_declaration); +void ctf_sequence_begin(struct stream_pos *pos, + const struct declaration_sequence *sequence_declaration); +void ctf_sequence_end(struct stream_pos *pos, + const struct declaration_sequence *sequence_declaration); + +void move_pos_slow(struct stream_pos *pos, size_t offset); + +void init_pos(struct stream_pos *pos, int fd); +void fini_pos(struct stream_pos *pos); + +/* + * move_pos - move position of a relative bit offset + * + * TODO: allow larger files by updating base too. + */ +static inline +void move_pos(struct stream_pos *pos, size_t bit_offset) +{ + if (pos->fd >= 0) { + if (((pos->prot == PROT_READ) + && (pos->offset + bit_offset >= pos->content_size)) + || ((pos->prot == PROT_WRITE) + && (pos->offset + bit_offset >= pos->packet_size))) { + move_pos_slow(pos, bit_offset); + return; + } + } + pos->offset += bit_offset; +} + +/* + * align_pos - align position on a bit offset (> 0) + * + * TODO: allow larger files by updating base too. + */ +static inline +void align_pos(struct stream_pos *pos, size_t bit_offset) +{ + move_pos(pos, offset_align(pos->offset, bit_offset)); +} + +static inline +char *get_pos_addr(struct stream_pos *pos) +{ + /* Only makes sense to get the address after aligning on CHAR_BIT */ + assert(!(pos->offset % CHAR_BIT)); + return pos->base + (pos->offset / CHAR_BIT); +} + +static inline +void dummy_pos(struct stream_pos *pos, struct stream_pos *dummy) +{ + memcpy(dummy, pos, sizeof(struct stream_pos)); + dummy->dummy = 1; + dummy->fd = -1; +} + +/* + * Check if current packet can hold data. + * Returns 0 for success, negative error otherwise. + */ +static inline +int pos_packet(struct stream_pos *dummy) +{ + if (dummy->offset > dummy->packet_size) + return -ENOSPC; + return 0; +} + +static inline +void pos_pad_packet(struct stream_pos *pos) +{ + move_pos(pos, pos->packet_size - pos->offset); +} #endif /* _BABELTRACE_CTF_TYPES_H */