misc.c


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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154


#include <ctype.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "misc.h"

char *read_file(const char *filename, long *size) {
	/* Open the file. */
	FILE *fp = fopen(filename, "r");
	/* Size of the file, in bytes. */
	long filesize = 0;
	/* Buffer of the file contents. */
	char *buf;

	/* Return NULL, if we couldn't open the file. */
	if (fp == NULL) {
		return NULL;
	}

	/* Return NULL, if we couldn't seek to the end of the file. */
	if (fseek(fp, 0L, SEEK_END)) {
		fclose(fp);
		return NULL;
	}

	/* Get the size of the file, in bytes. */
	filesize = ftell(fp);

	/* Return NULL, if the returned size is negative. */
	if (filesize < 0) {
		fclose(fp);
		return NULL;
	}

	/* Allocate enough space for the entire file, plus one. */
	buf = calloc(filesize+1, sizeof(char));

	/* Return NULL, if the buffer wasn't allocated. */
	if (buf == NULL) {
		fclose(fp);
		return NULL;
	}

	/* Seek back to the start of the file. */
	rewind(fp);
	/* Read the entire file contents into the buffer. */
	fread(buf, sizeof(char), filesize, fp);
	/* Close the file. */
	fclose(fp);

	/* Return the filesize, in bytes. */
	*size = filesize;
	/* Return the buffer. */
	return buf;
}

char *get_line(char **str) {
	char *s;
	size_t i;
	char *tmp = *str;

	for (i = 0; tmp[i] != '\n' && tmp[i] != '\0'; i++);

	s = calloc(i+1, sizeof(char));
	memcpy(s, *str, i);

	*str += (i+1);
	return s;
}

char *make_str(const char *str) {
	const size_t length = strlen(str);
	char *s = calloc(length+1, sizeof(char));
	memcpy(s, str, length+1);
	return s;
}

char *dir_path_num(const char *root, int num) {
	/* Get the length of the path. */
	int len = snprintf(NULL, 0, "%s/%i", root, num);
	/* Create the directory path. */
	char *dir = calloc(len+1, sizeof(char));
	sprintf(dir, "%s/%i", root, num);
	return dir;
}

char *dir_path_name(const char *root, char *name) {
	/* Get the length of the path. */
	int len = snprintf(NULL, 0, "%s/%s", root, name);
	/* Create the directory path. */
	char *dir = calloc(len+1, sizeof(char));
	sprintf(dir, "%s/%s", root, name);
	return dir;
}

int delm_span(char *str, const char delm) {
	int i;
	for (i = 0; str[i] == delm; i++);
	return i;
}

int sanitize_strlen(char *str) {
	int len = 0;
	while (*str != '\0') {
		const int tok_len = strcspn(str, " .");
		const char delm = str[tok_len];
		const int span_len = (delm != '\0') ? delm_span(&str[tok_len+1], delm) : 0;
		str += (tok_len + span_len);
		len += tok_len;
	}
	return len;
}

char *sanitize_str(char *str) {
	const int len = sanitize_strlen(str);
	char *san_str = calloc(len+1, sizeof(char));
	char *tmp = san_str;
	while (*str != '\0' && tmp < &san_str[len]) {
		const int tok_len = strcspn(str, " .");
		const char delm = str[tok_len];
		const int span_len = (delm != '\0') ? delm_span(&str[tok_len+1], delm) : 0;
		memcpy(tmp, str, tok_len);
		tmp += tok_len;
		str += (tok_len + span_len);
		*tmp = (delm == ' ') ? '-' : delm;
	}
	return san_str;
}

char *find_alpha(const char *str) {
	for (; !isalpha(*str); str++);
	return (char *)str;
}

char *create_num_str(const char *str, int num) {
	char *name;
	int lead_num = strtol(str, &name, 10);
	const char *sep = (*name != '-') ? "-" : "";
	const char *s = find_alpha(name);

	name = calloc(format_len("%04d%s%s", num, sep, s), sizeof(char));
	sprintf(name, "%04d%s%s", num, sep, str);
	return name;
}

int format_len(const char *fmt, ...) {
	int len = 0;
	va_list args;
	va_start(args, fmt);
	len = vsnprintf(NULL, 0, fmt, args);
	va_end(args);
	return len;
}