C_shell/history.c at master · doltonfernandes/C_shell · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
#include"header.h"

char historypath[10000];

void inithistory(char *hom)
{
	char buf[10000];
	strcpy(historypath,hom);
	strcat(historypath,"/history");
	FILE *fd=fopen(historypath,"r");
	if(fd==NULL)
	{
		fd=fopen(historypath,"w");
		fprintf(fd,"0\n");
	}
	else
	{
		fseek(fd,0,SEEK_END);
		if(ftell(fd)==0)
		{
			fd=fopen(historypath,"w");
			fprintf(fd,"0\n");
		}
	}
	fseek(fd,0,SEEK_SET);
	fscanf(fd,"%d",&histsize);
	fclose(fd);
}

void addtohistory(char *c)
{
	FILE *fd=fopen(historypath,"r");
	if(fd==NULL)
	{
		perror(historypath);
		exit(0);
	}
	char waste,buf[10000];
	fseek(fd,0,SEEK_SET);
	for(int i=0;i<=histsize;i++)
	{
		fscanf(fd,"%[^\n]s",buf);
		fscanf(fd,"%c",&waste);
		if(i!=0)
		{
			strcpy(hist[i-1],buf);
		}
	}
	fclose(fd);
	if(histsize==20)
	{
		for(int i=0;i<19;i++)
		{
			strcpy(hist[i],hist[i+1]);
		}
		histsize--;
	}
	strcpy(hist[histsize++],c);
	fd=fopen(historypath,"w+");
	if(fd==NULL)
	{
		perror(historypath);
		exit(0);
	}
	fseek(fd,0,SEEK_SET);
	fprintf(fd,"%d\n",histsize);
	for(int i=0;i<histsize;i++)
	{
		fprintf(fd,"%s\n",hist[i]);
	}
	fclose(fd);
}

void historyexe(char **c)
{
	int num=10;
	if(size1>1)
	{
		num=atoi(c[1]);
	}
	FILE *fd=fopen(historypath,"r");
	fseek(fd,0,SEEK_SET);
	char buf[10000],waste;
	for(int i=0;i<=histsize;i++)
	{
		fscanf(fd,"%[^\n]s",buf);
		fscanf(fd,"%c",&waste);
		if(i!=0)
		{
			strcpy(hist[i-1],buf);
		}
	}
	fclose(fd);
	for(int i=(0>histsize-num? 0:histsize-num);i<histsize;i++)
	{
		printf(" %d %s\n",i+1,hist[i]);
	}
}