graphlib.h File Reference

#include "libstd/defines.h"

Include dependency graph for graphlib.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	graph

Macros
#define	GL_BLANK_STEPS_PRECEEDING_STALE_DATA   2

Typedefs
typedef struct graph	graph

Functions
char *	strdup (const char *str)
graph *	GLCreateGraph (long x_min, long x_max, long y_min, long y_max, long x_steps)
void	GLDestroyGraph (graph *graph)
char *	GLSetTitle (graph *graph, char *title)
void	GLLabelAxes (graph *graph, char *x_axis, char *y_axis)
void	GLPushDataPoint (graph *graph, long y_val)
long	GLOffScreenValue (graph *graph)

Macro Definition Documentation

#define GL_BLANK_STEPS_PRECEEDING_STALE_DATA   2

Definition at line 14 of file graphlib.h.

Referenced by _FBDrawGraphData().

Typedef Documentation

typedef struct graph graph

Function Documentation

graph* GLCreateGraph	(	long	x_min,
		long	x_max,
		long	y_min,
		long	y_max,
		long	x_steps
	)

Definition at line 25 of file graphlib.c.

References graph::all_data_points_valid, graph::data, graph::x_index, graph::x_index_max, graph::x_max, graph::x_min, graph::y_max, and graph::y_min.

Referenced by main().

                                                                                   {
    graph* g = (graph*) calloc(1, sizeof(graph));
    g->x_min = x_min;
    g->x_max = x_max;
    g->y_min = y_min;
    g->y_max = y_max;

    g->data = (long*) calloc(x_steps, sizeof(long));
    g->x_index = 0;
    g->x_index_max = x_steps;

    g->all_data_points_valid = false;

    return (graph*) g;
}

Here is the caller graph for this function:

void GLDestroyGraph

(

graph *

graph

)

Definition at line 83 of file graphlib.c.

References graph::data, graph::title, graph::x_title, and graph::y_title.

                              {
    free(g->data);
    free(g->title);
    free(g->x_title);
    free(g->y_title);
    free(g);
}

void GLLabelAxes	(	graph *	graph,
		char *	x_axis,
		char *	y_axis
	)

Definition at line 48 of file graphlib.c.

References strdup(), graph::x_title, and graph::y_title.

Referenced by main().

                                                       {
    g->x_title = strdup(x_axis);
    g->y_title = strdup(y_axis);
}

Here is the call graph for this function:

Here is the caller graph for this function:

long GLOffScreenValue

(

graph *

graph

)

Definition at line 71 of file graphlib.c.

References graph::y_max, and graph::y_min.

                                {
    long off_screen_value = g->y_max + 1;
    if (off_screen_value < g->y_max) {
    off_screen_value = g->y_min - 1;
    } if (off_screen_value > g->y_min) {
    off_screen_value = LONG_MIN;
    }
    return off_screen_value;
}

void GLPushDataPoint	(	graph *	graph,
		long	y_val
	)

Definition at line 56 of file graphlib.c.

References graph::all_data_points_valid, graph::data, graph::most_recent_data_point, graph::x_index, and graph::x_index_max.

Referenced by main().

                                           {
    /* Procedure: push the y data point at the current x_position and
     * then increment the current x_position. */
    g->data[g->x_index] = y_val;
    g->most_recent_data_point = g->x_index++;

    if (g->x_index >= g->x_index_max) {
    g->x_index = 0;
    g->all_data_points_valid = true; // one-way toggle to true
    }
}

Here is the caller graph for this function:

char* GLSetTitle	(	graph *	graph,
		char *	title
	)

Definition at line 42 of file graphlib.c.

References strdup(), and graph::title.

Referenced by main().

                                        {
    g->title = strdup(title);
    return g->title;
}

Here is the call graph for this function:

Here is the caller graph for this function:

char* strdup

(

const char *

str

)

Definition at line 15 of file graphlib.c.

References null.

Referenced by GLLabelAxes(), GLSetTitle(), and utarray_str_cpy().

                              {
  if (str != null) {
    char *copy = malloc(strlen(str) + 1);
    if (copy != null)
      return strcpy(copy, str);
  }
  return null;
}

Here is the caller graph for this function: