#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "graphlib.h"

Include dependency graph for graphlib.c:

Functions
char *	strdup (const char *str)

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

char *	GLSetTitle (graph g, char title)

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

void	GLPushDataPoint (graph *g, long y_val)

long	GLOffScreenValue (graph *g)

void	GLDestroyGraph (graph *g)

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;
 }

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void GLDestroyGraph ( graph * g )

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 *	g,
		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);
 }

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long GLOffScreenValue ( graph * g )

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 *	g,
		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
     }
 }

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char* GLSetTitle	(	graph *	g,
		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;
 }

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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;
 }

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Functions

Function Documentation