| /* |
| * This file is part of the coreboot project. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program 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 General Public License for more details. |
| */ |
| |
| #include <commonlib/endian.h> |
| #include <commonlib/iobuf.h> |
| #include <string.h> |
| |
| static int ibuf_check_size(const struct ibuf *ib, size_t sz) |
| { |
| if (ibuf_remaining(ib) < sz) |
| return -1; |
| |
| return 0; |
| } |
| |
| void ibuf_init(struct ibuf *ib, const void *b, size_t sz) |
| { |
| ib->b = b; |
| ib->n_read = 0; |
| ib->capacity = sz; |
| } |
| |
| void ibuf_from_obuf(struct ibuf *ib, const struct obuf *ob) |
| { |
| ibuf_init(ib, ob->b, ob->n_written); |
| } |
| |
| int ibuf_splice(const struct ibuf *src, struct ibuf *dst, size_t off, size_t sz) |
| { |
| size_t end = off + sz; |
| size_t capacity = ibuf_capacity(src); |
| size_t nr_read = ibuf_nr_read(src); |
| |
| if (end < off || end < sz || end > capacity) |
| return -1; |
| |
| ibuf_init(dst, &src->b[off], sz); |
| |
| /* Handle previously read data in src. */ |
| if (off < nr_read) |
| dst->n_read = nr_read - off; |
| |
| return 0; |
| } |
| |
| int ibuf_splice_current(const struct ibuf *src, struct ibuf *dst, size_t sz) |
| { |
| return ibuf_splice(src, dst, ibuf_nr_read(src), sz); |
| } |
| |
| int ibuf_split(const struct ibuf *src, struct ibuf *a, struct ibuf *b, |
| size_t boundary) |
| { |
| if (ibuf_splice(src, a, 0, boundary)) |
| return -1; |
| |
| return ibuf_splice(src, b, boundary, ibuf_capacity(src) - boundary); |
| } |
| |
| const void *ibuf_oob_drain(struct ibuf *ib, size_t sz) |
| { |
| const void *b; |
| |
| if (ibuf_check_size(ib, sz)) |
| return NULL; |
| |
| b = &ib->b[ib->n_read]; |
| ib->n_read += sz; |
| |
| return b; |
| } |
| |
| int ibuf_read(struct ibuf *ib, void *data, size_t sz) |
| { |
| const void *b = ibuf_oob_drain(ib, sz); |
| |
| if (b == NULL) |
| return -1; |
| |
| memcpy(data, b, sz); |
| |
| return 0; |
| } |
| |
| int ibuf_read_be8(struct ibuf *ib, uint8_t *v) |
| { |
| size_t sz = sizeof(*v); |
| |
| if (ibuf_check_size(ib, sz)) |
| return -1; |
| |
| *v = read_at_be8(ib->b, ib->n_read); |
| ib->n_read += sz; |
| |
| return 0; |
| } |
| |
| int ibuf_read_be16(struct ibuf *ib, uint16_t *v) |
| { |
| size_t sz = sizeof(*v); |
| |
| if (ibuf_check_size(ib, sz)) |
| return -1; |
| |
| *v = read_at_be16(ib->b, ib->n_read); |
| ib->n_read += sz; |
| |
| return 0; |
| } |
| |
| int ibuf_read_be32(struct ibuf *ib, uint32_t *v) |
| { |
| size_t sz = sizeof(*v); |
| |
| if (ibuf_check_size(ib, sz)) |
| return -1; |
| |
| *v = read_at_be32(ib->b, ib->n_read); |
| ib->n_read += sz; |
| |
| return 0; |
| } |
| |
| int ibuf_read_be64(struct ibuf *ib, uint64_t *v) |
| { |
| size_t sz = sizeof(*v); |
| |
| if (ibuf_check_size(ib, sz)) |
| return -1; |
| |
| *v = read_at_be64(ib->b, ib->n_read); |
| ib->n_read += sz; |
| |
| return 0; |
| } |
| |
| int ibuf_read_le8(struct ibuf *ib, uint8_t *v) |
| { |
| size_t sz = sizeof(*v); |
| |
| if (ibuf_check_size(ib, sz)) |
| return -1; |
| |
| *v = read_at_le8(ib->b, ib->n_read); |
| ib->n_read += sz; |
| |
| return 0; |
| } |
| |
| int ibuf_read_le16(struct ibuf *ib, uint16_t *v) |
| { |
| size_t sz = sizeof(*v); |
| |
| if (ibuf_check_size(ib, sz)) |
| return -1; |
| |
| *v = read_at_le16(ib->b, ib->n_read); |
| ib->n_read += sz; |
| |
| return 0; |
| } |
| |
| int ibuf_read_le32(struct ibuf *ib, uint32_t *v) |
| { |
| size_t sz = sizeof(*v); |
| |
| if (ibuf_check_size(ib, sz)) |
| return -1; |
| |
| *v = read_at_le32(ib->b, ib->n_read); |
| ib->n_read += sz; |
| |
| return 0; |
| } |
| |
| int ibuf_read_le64(struct ibuf *ib, uint64_t *v) |
| { |
| size_t sz = sizeof(*v); |
| |
| if (ibuf_check_size(ib, sz)) |
| return -1; |
| |
| *v = read_at_le64(ib->b, ib->n_read); |
| ib->n_read += sz; |
| |
| return 0; |
| } |
| |
| int ibuf_read_n8(struct ibuf *ib, uint8_t *v) |
| { |
| return ibuf_read(ib, v, sizeof(*v)); |
| } |
| |
| int ibuf_read_n16(struct ibuf *ib, uint16_t *v) |
| { |
| return ibuf_read(ib, v, sizeof(*v)); |
| } |
| |
| int ibuf_read_n32(struct ibuf *ib, uint32_t *v) |
| { |
| return ibuf_read(ib, v, sizeof(*v)); |
| } |
| |
| int ibuf_read_n64(struct ibuf *ib, uint64_t *v) |
| { |
| return ibuf_read(ib, v, sizeof(*v)); |
| } |
| |
| static int obuf_check_size(const struct obuf *ob, size_t sz) |
| { |
| if (obuf_remaining(ob) < sz) |
| return -1; |
| |
| return 0; |
| } |
| |
| void obuf_init(struct obuf *ob, void *b, size_t sz) |
| { |
| ob->b = b; |
| ob->n_written = 0; |
| ob->capacity = sz; |
| } |
| |
| int obuf_splice(const struct obuf *src, struct obuf *dst, size_t off, size_t sz) |
| { |
| size_t end = off + sz; |
| size_t capacity = obuf_capacity(src); |
| size_t nr_written = obuf_nr_written(src); |
| |
| if (end < off || end < sz || end > capacity) |
| return -1; |
| |
| obuf_init(dst, &src->b[off], sz); |
| |
| /* Handle previously written data in src. */ |
| if (off < nr_written) |
| dst->n_written = nr_written - off; |
| |
| return 0; |
| } |
| |
| int obuf_splice_current(const struct obuf *src, struct obuf *dst, size_t sz) |
| { |
| return obuf_splice(src, dst, obuf_nr_written(src), sz); |
| } |
| |
| int obuf_split(const struct obuf *src, struct obuf *a, struct obuf *b, |
| size_t boundary) |
| { |
| if (obuf_splice(src, a, 0, boundary)) |
| return -1; |
| |
| return obuf_splice(src, b, boundary, obuf_capacity(src) - boundary); |
| } |
| |
| void *obuf_oob_fill(struct obuf *ob, size_t sz) |
| { |
| void *b; |
| |
| if (obuf_check_size(ob, sz)) |
| return NULL; |
| |
| b = &ob->b[ob->n_written]; |
| ob->n_written += sz; |
| |
| return b; |
| } |
| |
| int obuf_write(struct obuf *ob, const void *data, size_t sz) |
| { |
| void *b; |
| |
| b = obuf_oob_fill(ob, sz); |
| if (b == NULL) |
| return -1; |
| |
| memcpy(b, data, sz); |
| |
| return 0; |
| } |
| |
| int obuf_write_be8(struct obuf *ob, uint8_t v) |
| { |
| size_t sz = sizeof(v); |
| |
| if (obuf_check_size(ob, sz)) |
| return -1; |
| |
| write_at_be8(ob->b, v, ob->n_written); |
| ob->n_written += sz; |
| |
| return 0; |
| } |
| |
| int obuf_write_be16(struct obuf *ob, uint16_t v) |
| { |
| size_t sz = sizeof(v); |
| |
| if (obuf_check_size(ob, sz)) |
| return -1; |
| |
| write_at_be16(ob->b, v, ob->n_written); |
| ob->n_written += sz; |
| |
| return 0; |
| } |
| |
| int obuf_write_be32(struct obuf *ob, uint32_t v) |
| { |
| size_t sz = sizeof(v); |
| |
| if (obuf_check_size(ob, sz)) |
| return -1; |
| |
| write_at_be32(ob->b, v, ob->n_written); |
| ob->n_written += sz; |
| |
| return 0; |
| } |
| |
| int obuf_write_be64(struct obuf *ob, uint64_t v) |
| { |
| size_t sz = sizeof(v); |
| |
| if (obuf_check_size(ob, sz)) |
| return -1; |
| |
| write_at_be64(ob->b, v, ob->n_written); |
| ob->n_written += sz; |
| |
| return 0; |
| } |
| |
| int obuf_write_le8(struct obuf *ob, uint8_t v) |
| { |
| size_t sz = sizeof(v); |
| |
| if (obuf_check_size(ob, sz)) |
| return -1; |
| |
| write_at_le8(ob->b, v, ob->n_written); |
| ob->n_written += sz; |
| |
| return 0; |
| } |
| |
| int obuf_write_le16(struct obuf *ob, uint16_t v) |
| { |
| size_t sz = sizeof(v); |
| |
| if (obuf_check_size(ob, sz)) |
| return -1; |
| |
| write_at_le16(ob->b, v, ob->n_written); |
| ob->n_written += sz; |
| |
| return 0; |
| } |
| |
| int obuf_write_le32(struct obuf *ob, uint32_t v) |
| { |
| size_t sz = sizeof(v); |
| |
| if (obuf_check_size(ob, sz)) |
| return -1; |
| |
| write_at_le32(ob->b, v, ob->n_written); |
| ob->n_written += sz; |
| |
| return 0; |
| } |
| |
| int obuf_write_le64(struct obuf *ob, uint64_t v) |
| { |
| size_t sz = sizeof(v); |
| |
| if (obuf_check_size(ob, sz)) |
| return -1; |
| |
| write_at_le64(ob->b, v, ob->n_written); |
| ob->n_written += sz; |
| |
| return 0; |
| } |
| |
| int obuf_write_n8(struct obuf *ob, uint8_t v) |
| { |
| return obuf_write(ob, &v, sizeof(v)); |
| } |
| |
| int obuf_write_n16(struct obuf *ob, uint16_t v) |
| { |
| return obuf_write(ob, &v, sizeof(v)); |
| } |
| |
| int obuf_write_n32(struct obuf *ob, uint32_t v) |
| { |
| return obuf_write(ob, &v, sizeof(v)); |
| } |
| |
| int obuf_write_n64(struct obuf *ob, uint64_t v) |
| { |
| return obuf_write(ob, &v, sizeof(v)); |
| } |
| |
| const void *obuf_contents(const struct obuf *ob, size_t *sz) |
| { |
| *sz = obuf_nr_written(ob); |
| return ob->b; |
| } |