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2 nishi 1 
/* $Id: string.c 20 2024-09-14 09:59:15Z nishi $ */
3 nishi 2 
 
3 
#include <string.h>
4 
#include <stdlib.h>
5 nishi 5 
#include <stdbool.h>
20 nishi 6 
#include <stdio.h>
5 nishi 7 
#include <ctype.h>
3 nishi 8 
 
9 
char* cm_strcat(const char* a, const char* b) {
10 
	char* str = malloc(strlen(a) + strlen(b) + 1);
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	memcpy(str, a, strlen(a));
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	memcpy(str + strlen(a), b, strlen(b));
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	str[strlen(a) + strlen(b)] = 0;
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	return str;
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}
16 
 
16 nishi 17 
char* cm_strcat3(const char* a, const char* b, const char* c) {
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	char* tmp = cm_strcat(a, b);
19 
	char* str = cm_strcat(tmp, c);
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	free(tmp);
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	return str;
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}
23 
 
3 nishi 24 
char* cm_strdup(const char* str) { return cm_strcat(str, ""); }
4 nishi 25 
 
6 nishi 26 
char* cm_trimstart(const char* str) {
4 nishi 27 
	int i;
6 nishi 28 
	for(i = 0; str[i] != 0; i++) {
29 
		if(str[i] != ' ' && str[i] != '\t') {
4 nishi 30 
			return cm_strdup(str + i);
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		}
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	}
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	return cm_strdup("");
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}
35 
 
6 nishi 36 
char* cm_trimend(const char* str) {
4 nishi 37 
	char* s = cm_strdup(str);
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	int i;
6 nishi 39 
	for(i = strlen(s) - 1; i >= 0; i--) {
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		if(s[i] != '\t' && s[i] != ' ') {
4 nishi 41 
			s[i + 1] = 0;
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			break;
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		}
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	}
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	return s;
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}
47 
 
6 nishi 48 
char* cm_trim(const char* str) {
4 nishi 49 
	char* tmp = cm_trimstart(str);
50 
	char* s = cm_trimend(tmp);
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	free(tmp);
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	return s;
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}
5 nishi 54 
 
6 nishi 55 
char** cm_split(const char* str, const char* by) {
5 nishi 56 
	int i;
57 
	char** r = malloc(sizeof(*r));
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	r[0] = NULL;
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	char* b = malloc(1);
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	b[0] = 0;
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	char cbuf[2];
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	cbuf[1] = 0;
63 
	bool dq = false;
64 
	bool sq = false;
6 nishi 65 
	for(i = 0;; i++) {
5 nishi 66 
		int j;
67 
		bool has = false;
6 nishi 68 
		for(j = 0; by[j] != 0; j++) {
69 
			if(by[j] == str[i]) {
5 nishi 70 
				has = true;
71 
				break;
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			}
73 
		}
6 nishi 74 
		if(!(dq || sq) && (has || str[i] == 0)) {
75 
			if(strlen(b) > 0) {
5 nishi 76 
				char** old = r;
77 
				int j;
6 nishi 78 
				for(j = 0; old[j] != NULL; j++)
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					;
5 nishi 80 
				r = malloc(sizeof(*r) * (j + 2));
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				for(j = 0; old[j] != NULL; j++) r[j] = old[j];
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				r[j] = b;
83 
				r[j + 1] = NULL;
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				free(old);
85 
			}
86 
			b = malloc(1);
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			b[0] = 0;
88 
			if(str[i] == 0) break;
6 nishi 89 
		} else {
90 
			if(str[i] == '"' && !sq) {
5 nishi 91 
				dq = !dq;
6 nishi 92 
			} else if(str[i] == '\'' && !dq) {
5 nishi 93 
				sq = !sq;
6 nishi 94 
			} else {
5 nishi 95 
				cbuf[0] = str[i];
96 
				char* tmp = b;
97 
				b = cm_strcat(tmp, cbuf);
98 
				free(tmp);
99 
			}
100 
		}
101 
	}
102 
	free(b);
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	return r;
104 
}
105 
 
6 nishi 106 
bool cm_strcaseequ(const char* a, const char* b) {
5 nishi 107 
	if(a == NULL) return false;
108 
	if(b == NULL) return false;
109 
	if(strlen(a) != strlen(b)) return false;
110 
	int i;
6 nishi 111 
	for(i = 0; a[i] != 0; i++) {
5 nishi 112 
		if(tolower(a[i]) != tolower(b[i])) return false;
113 
	}
114 
	return true;
115 
}
20 nishi 116 
 
117 
int cm_hex(const char* str, int len) {
118 
	int n = 0;
119 
	int i;
120 
	for(i = 0; i < len; i++) {
121 
		char c = str[i];
122 
		n *= 16;
123 
		if('0' <= c && c <= '9') {
124 
			n += c - '0';
125 
		} else if('a' <= c && c <= 'f') {
126 
			n += c - 'a' + 10;
127 
		} else if('A' <= c && c <= 'F') {
128 
			n += c - 'A' + 10;
129 
		}
130 
	}
131 
	return n;
132 
}
133 
 
134 
char* cm_html_escape(const char* str) {
135 
	int i;
136 
	char* result = malloc(1);
137 
	result[0] = 0;
138 
	char cbuf[2];
139 
	cbuf[1] = 0;
140 
	for(i = 0; str[i] != 0; i++) {
141 
		cbuf[0] = str[i];
142 
		if(str[i] == '&') {
143 
			char* tmp = result;
144 
			result = cm_strcat(tmp, "&amp;");
145 
			free(tmp);
146 
		} else if(str[i] == '<') {
147 
			char* tmp = result;
148 
			result = cm_strcat(tmp, "&lt;");
149 
			free(tmp);
150 
		} else if(str[i] == '>') {
151 
			char* tmp = result;
152 
			result = cm_strcat(tmp, "&gt;");
153 
			free(tmp);
154 
		} else {
155 
			char* tmp = result;
156 
			result = cm_strcat(tmp, cbuf);
157 
			free(tmp);
158 
		}
159 
	}
160 
	return result;
161 
}