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/* $Id: string.c 16 2024-09-13 15:09:52Z nishi $ */
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/* $Id: string.c 20 2024-09-14 09:59:15Z nishi $ */
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#include <string.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <ctype.h>
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char* cm_strcat(const char* a, const char* b) {
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char* cm_strcat(const char* a, const char* b) {
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	char* str = malloc(strlen(a) + strlen(b) + 1);
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	char* str = malloc(strlen(a) + strlen(b) + 1);
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	memcpy(str, a, strlen(a));
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	memcpy(str, a, strlen(a));
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	for(i = 0; a[i] != 0; i++) {
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	for(i = 0; a[i] != 0; i++) {
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		if(tolower(a[i]) != tolower(b[i])) return false;
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		if(tolower(a[i]) != tolower(b[i])) return false;
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	}
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	}
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	return true;
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	return true;
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}
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}
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int cm_hex(const char* str, int len) {
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	int n = 0;
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	int i;
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	for(i = 0; i < len; i++) {
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		char c = str[i];
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		n *= 16;
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		if('0' <= c && c <= '9') {
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			n += c - '0';
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		} else if('a' <= c && c <= 'f') {
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			n += c - 'a' + 10;
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		} else if('A' <= c && c <= 'F') {
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			n += c - 'A' + 10;
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		}
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	}
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	return n;
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}
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char* cm_html_escape(const char* str) {
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	int i;
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	char* result = malloc(1);
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	result[0] = 0;
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	char cbuf[2];
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	cbuf[1] = 0;
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	for(i = 0; str[i] != 0; i++) {
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		cbuf[0] = str[i];
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		if(str[i] == '&') {
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			char* tmp = result;
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			result = cm_strcat(tmp, "&amp;");
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			free(tmp);
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		} else if(str[i] == '<') {
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			char* tmp = result;
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			result = cm_strcat(tmp, "&lt;");
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			free(tmp);
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		} else if(str[i] == '>') {
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			char* tmp = result;
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			result = cm_strcat(tmp, "&gt;");
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			free(tmp);
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		} else {
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			char* tmp = result;
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			result = cm_strcat(tmp, cbuf);
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			free(tmp);
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		}
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	}
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	return result;
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}