jas_seq.h

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/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2002 Michael David Adams.
 * All rights reserved.
 */
 
/* __START_OF_JASPER_LICENSE__
 * 
 * JasPer License Version 2.0
 * 
 * Copyright (c) 2001-2006 Michael David Adams
 * Copyright (c) 1999-2000 Image Power, Inc.
 * Copyright (c) 1999-2000 The University of British Columbia
 * 
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person (the
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 * persons to whom the Software is furnished to do so, subject to the
 * following conditions:
 * 
 * 1.  The above copyright notices and this permission notice (which
 * includes the disclaimer below) shall be included in all copies or
 * substantial portions of the Software.
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 * promote products derived from the Software without specific prior
 * written permission.
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 */
 
#ifndef JAS_SEQ_H
#define JAS_SEQ_H
 
/******************************************************************************\
* Includes.
\******************************************************************************/
 
/* The configuration header file should be included first. */
#include <jasper/jas_config.h> /* IWYU pragma: keep */
 
#include <jasper/jas_types.h>
#include <jasper/jas_math.h>
 
#include <stdio.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/******************************************************************************\
* Constants.
\******************************************************************************/
 
/* This matrix is a reference to another matrix. */
#define JAS_MATRIX_REF  0x0001
 
/******************************************************************************\
* Types.
\******************************************************************************/
 
/* An element in a sequence. */
#ifdef JAS_ENABLE_32BIT
typedef int_least32_t jas_seqent_t;
#define PRIjas_seqent PRIiLEAST32
#else
typedef int_fast32_t jas_seqent_t;
#define PRIjas_seqent PRIiFAST32
#endif
 
/* An element in a matrix. */
#ifdef JAS_ENABLE_32BIT
typedef int_least32_t jas_matent_t;
#else
typedef int_fast32_t jas_matent_t;
#endif
 
#ifdef JAS_ENABLE_32BIT
typedef int_least32_t jas_matind_t;
#else
typedef int_fast32_t jas_matind_t;
#endif
 
/* Matrix. */
 
typedef struct {
 
        /* Additional state information. */
        int flags_;
 
        /* The starting horizontal index. */
        jas_matind_t xstart_;
 
        /* The starting vertical index. */
        jas_matind_t ystart_;
 
        /* The ending horizontal index. */
        jas_matind_t xend_;
 
        /* The ending vertical index. */
        jas_matind_t yend_;
 
        /* The number of rows in the matrix. */
        jas_matind_t numrows_;
 
        /* The number of columns in the matrix. */
        jas_matind_t numcols_;
 
        /* Pointers to the start of each row. */
        jas_seqent_t **rows_;
 
        /* The allocated size of the rows array. */
        int_fast32_t maxrows_;
 
        /* The matrix data buffer. */
        jas_seqent_t *data_;
 
        /* The allocated size of the data array. */
        int_fast32_t datasize_;
 
} jas_matrix_t;
 
typedef jas_matrix_t jas_seq2d_t;
typedef jas_matrix_t jas_seq_t;
 
/******************************************************************************\
* Functions/macros for matrix class.
\******************************************************************************/
 
/* Get the number of rows. */
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_matrix_numrows(const jas_matrix_t *matrix)
{
        return matrix->numrows_;
}
 
/* Get the number of columns. */
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_matrix_numcols(const jas_matrix_t *matrix)
{
        return matrix->numcols_;
}
 
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_matrix_size(const jas_matrix_t *matrix)
{
        return jas_matrix_numcols(matrix) * jas_matrix_numrows(matrix);
}
 
JAS_ATTRIBUTE_PURE
static inline bool jas_matrix_empty(const jas_matrix_t *matrix)
{
        return jas_matrix_numcols(matrix) == 0 || jas_matrix_numrows(matrix) == 0;
}
 
/* Get a matrix element. */
JAS_ATTRIBUTE_PURE
static inline jas_seqent_t jas_matrix_get(const jas_matrix_t *matrix, jas_matind_t i, jas_matind_t j)
{
        return matrix->rows_[i][j];
}
 
/* Set a matrix element. */
static inline void jas_matrix_set(jas_matrix_t *matrix, jas_matind_t i, jas_matind_t j, jas_seqent_t v)
{
        matrix->rows_[i][j] = v;
}
 
/* Get an element from a matrix that is known to be a row or column vector. */
JAS_ATTRIBUTE_PURE
static inline jas_seqent_t jas_matrix_getv(const jas_matrix_t *matrix, jas_matind_t i)
{
        return matrix->numrows_ == 1
                ? matrix->rows_[0][i]
                : matrix->rows_[i][0];
}
 
/* Set an element in a matrix that is known to be a row or column vector. */
static inline void jas_matrix_setv(jas_matrix_t *matrix, jas_matind_t i, jas_seqent_t v)
{
        if (matrix->numrows_ == 1)
                matrix->rows_[0][i] = v;
        else
                matrix->rows_[i][0] = v;
}
 
/* Get the address of an element in a matrix. */
JAS_ATTRIBUTE_PURE
static inline jas_seqent_t *jas_matrix_getref(const jas_matrix_t *matrix, jas_matind_t i, jas_matind_t j)
{
        return &matrix->rows_[i][j];
}
 
JAS_ATTRIBUTE_PURE
static inline jas_seqent_t *jas_matrix_getvref(const jas_matrix_t *matrix, jas_matind_t i)
{
        return matrix->numrows_ > 1
                ? jas_matrix_getref(matrix, i, 0)
                : jas_matrix_getref(matrix, 0, i);
}
 
/* Create a matrix with the specified dimensions. */
JAS_DLLEXPORT jas_matrix_t *jas_matrix_create(jas_matind_t numrows, jas_matind_t numcols);
 
/* Destroy a matrix. */
JAS_DLLEXPORT void jas_matrix_destroy(jas_matrix_t *matrix);
 
/* Resize a matrix.  The previous contents of the matrix are lost. */
JAS_DLLEXPORT int jas_matrix_resize(jas_matrix_t *matrix, jas_matind_t numrows, jas_matind_t numcols);
 
JAS_DLLEXPORT int jas_matrix_output(jas_matrix_t *matrix, FILE *out);
 
/* Create a matrix that references part of another matrix. */
JAS_DLLEXPORT int jas_matrix_bindsub(jas_matrix_t *mat0, jas_matrix_t *mat1, jas_matind_t r0,
  jas_matind_t c0, jas_matind_t r1, jas_matind_t c1);
 
/* Create a matrix that is a reference to a row of another matrix. */
static inline int jas_matrix_bindrow(jas_matrix_t *mat0, jas_matrix_t *mat1, jas_matind_t r)
{
        return jas_matrix_bindsub(mat0, mat1, r, 0, r, mat1->numcols_ - 1);
}
 
/* Create a matrix that is a reference to a column of another matrix. */
static inline int jas_matrix_bindcol(jas_matrix_t *mat0, jas_matrix_t *mat1, jas_matind_t c)
{
        return jas_matrix_bindsub(mat0, mat1, 0, c, mat1->numrows_ - 1, c);
}
 
/* Clip the values of matrix elements to the specified range. */
JAS_DLLEXPORT void jas_matrix_clip(jas_matrix_t *matrix, jas_seqent_t minval,
  jas_seqent_t maxval);
 
/* Arithmetic shift left of all elements in a matrix. */
JAS_DLLEXPORT void jas_matrix_asl(jas_matrix_t *matrix, unsigned n);
 
/* Arithmetic shift right of all elements in a matrix. */
JAS_DLLEXPORT void jas_matrix_asr(jas_matrix_t *matrix, unsigned n);
 
/* Almost-but-not-quite arithmetic shift right of all elements in a matrix. */
JAS_DLLEXPORT void jas_matrix_divpow2(jas_matrix_t *matrix, unsigned n);
 
/* Set all elements of a matrix to the specified value. */
JAS_DLLEXPORT void jas_matrix_setall(jas_matrix_t *matrix, jas_seqent_t val);
 
/* The spacing between rows of a matrix. */
JAS_ATTRIBUTE_PURE
static inline size_t jas_matrix_rowstep(const jas_matrix_t *matrix)
{
        return matrix->numrows_ > 1
                ? (size_t)(matrix->rows_[1] - matrix->rows_[0])
                : 0u;
}
 
/* The spacing between columns of a matrix. */
JAS_ATTRIBUTE_PURE
static inline size_t jas_matrix_step(const jas_matrix_t *matrix)
{
        return matrix->numrows_ > 1
                ? jas_matrix_rowstep(matrix)
                : 1;
}
 
/* Compare two matrices for equality. */
JAS_DLLEXPORT int jas_matrix_cmp(jas_matrix_t *mat0, jas_matrix_t *mat1);
 
JAS_DLLEXPORT jas_matrix_t *jas_matrix_copy(jas_matrix_t *x);
 
JAS_DLLEXPORT jas_matrix_t *jas_matrix_input(FILE *);
 
JAS_ATTRIBUTE_CONST
static inline jas_seqent_t jas_seqent_asl(jas_seqent_t x, unsigned n)
{
#ifdef JAS_ENABLE_32BIT
        return jas_least32_asl(x, n);
#else
        return jas_fast32_asl(x, n);
#endif
}
 
JAS_ATTRIBUTE_CONST
static inline jas_seqent_t jas_seqent_asr(jas_seqent_t x, unsigned n)
{
#ifdef JAS_ENABLE_32BIT
        return jas_least32_asr(x, n);
#else
        return jas_fast32_asr(x, n);
#endif
}
 
/******************************************************************************\
* Functions/macros for 2-D sequence class.
\******************************************************************************/
 
JAS_DLLEXPORT jas_seq2d_t *jas_seq2d_copy(jas_seq2d_t *x);
 
JAS_DLLEXPORT jas_matrix_t *jas_seq2d_create(jas_matind_t xstart, jas_matind_t ystart,
  jas_matind_t xend, jas_matind_t yend);
 
static inline void jas_seq2d_destroy(jas_seq2d_t *s)
{
        jas_matrix_destroy(s);
}
 
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_seq2d_xstart(const jas_seq2d_t *s)
{
        return s->xstart_;
}
 
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_seq2d_ystart(const jas_seq2d_t *s)
{
        return s->ystart_;
}
 
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_seq2d_xend(const jas_seq2d_t *s)
{
        return s->xend_;
}
 
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_seq2d_yend(const jas_seq2d_t *s)
{
        return s->yend_;
}
 
JAS_ATTRIBUTE_PURE
static inline jas_seqent_t *jas_seq2d_getref(const jas_seq2d_t *s, jas_matind_t x, jas_matind_t y)
{
        return jas_matrix_getref(s, y - s->ystart_, x - s->xstart_);
}
 
JAS_ATTRIBUTE_PURE
static inline jas_seqent_t jas_seq2d_get(const jas_seq2d_t *s, jas_matind_t x, jas_matind_t y)
{
        return jas_matrix_get(s, y - s->ystart_, x - s->xstart_);
}
 
JAS_ATTRIBUTE_PURE
static inline size_t jas_seq2d_rowstep(const jas_seq2d_t *s)
{
        return jas_matrix_rowstep(s);
}
 
JAS_ATTRIBUTE_PURE
static inline unsigned jas_seq2d_width(const jas_seq2d_t *s)
{
        return (unsigned)(s->xend_ - s->xstart_);
}
 
JAS_ATTRIBUTE_PURE
static inline unsigned jas_seq2d_height(const jas_seq2d_t *s)
{
        return (unsigned)(s->yend_ - s->ystart_);
}
 
static inline void jas_seq2d_setshift(jas_seq2d_t *s, jas_matind_t x, jas_matind_t y)
{
        s->xstart_ = x;
        s->ystart_ = y;
        s->xend_ = s->xstart_ + s->numcols_;
        s->yend_ = s->ystart_ + s->numrows_;
}
 
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_seq2d_size(const jas_seq2d_t *s)
{
        return jas_seq2d_width(s) * jas_seq2d_height(s);
}
 
JAS_ATTRIBUTE_PURE
static inline bool jas_seq2d_empty(const jas_seq2d_t *s)
{
        return jas_seq2d_width(s) == 0 || jas_seq2d_height(s) == 0;
}
 
JAS_DLLEXPORT int jas_seq2d_bindsub(jas_matrix_t *s, jas_matrix_t *s1, jas_matind_t xstart,
  jas_matind_t ystart, jas_matind_t xend, jas_matind_t yend);
 
/******************************************************************************\
* Functions/macros for 1-D sequence class.
\******************************************************************************/
 
static inline jas_seq_t *jas_seq_create(jas_matind_t start, jas_matind_t end)
{
        return jas_seq2d_create(start, 0, end, 1);
}
 
static inline void jas_seq_destroy(jas_seq_t *seq)
{
        jas_seq2d_destroy(seq);
}
 
static inline void jas_seq_set(jas_seq_t *seq, jas_matind_t i, jas_seqent_t v)
{
        seq->rows_[0][i - seq->xstart_] = v;
}
 
JAS_ATTRIBUTE_PURE
static inline jas_seqent_t *jas_seq_getref(const jas_seq_t *seq, jas_matind_t i)
{
        return &seq->rows_[0][i - seq->xstart_];
}
 
JAS_ATTRIBUTE_PURE
static inline jas_seqent_t jas_seq_get(const jas_seq_t *seq, jas_matind_t i)
{
        return seq->rows_[0][i - seq->xstart_];
}
 
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_seq_start(const jas_seq_t *seq)
{
        return seq->xstart_;
}
 
JAS_ATTRIBUTE_PURE
static inline jas_matind_t jas_seq_end(const jas_seq_t *seq)
{
        return seq->xend_;
}
 
#ifdef __cplusplus
}
#endif
 
#endif