Sparkline Generator

ASCII sparkline rendering for visualizing data distributions.

/* sparkline.h -- ASCII Sparklines header file
 *
 * ---------------------------------------------------------------------------
 *
 * Copyright (c) 2011-Present, Redis Ltd.
 * All rights reserved.
 *
 * Licensed under your choice of the Redis Source Available License 2.0
 * (RSALv2) or the Server Side Public License v1 (SSPLv1).
 */

#ifndef __SPARKLINE_H
#define __SPARKLINE_H

/* A sequence is represented of many "samples" */
struct sample {
    double value;
    char *label;
};

struct sequence {
    int length;
    int labels;
    struct sample *samples;
    double min, max;
};

#define SPARKLINE_NO_FLAGS 0
#define SPARKLINE_FILL 1      /* Fill the area under the curve. */
#define SPARKLINE_LOG_SCALE 2 /* Use logarithmic scale. */

struct sequence *createSparklineSequence(void);
void s

... (truncated -- full source via MCP)