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1 nishi 1 
/* $Id: util.c 3 2024-08-20 21:05:24Z nishi $ */
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#include "rv_util.h"
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#include "../config.h"
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#include "rv_version.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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3 nishi 13 
char* rv_strcat(const char* a, const char* b) {
1 nishi 14 
	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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}
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3 nishi 21 
char* rv_strcat3(const char* a, const char* b, const char* c) {
1 nishi 22 
	char* tmp = rv_strcat(a, b);
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	char* str = rv_strcat(tmp, c);
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	free(tmp);
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	return str;
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}
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3 nishi 28 
char* rv_strdup(const char* str) { return rv_strcat(str, ""); }
1 nishi 29 
 
3 nishi 30 
void rv_error_http(void) {
1 nishi 31 
	printf("Content-Type: text/plain\r\n");
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	printf("Status: 500 Internal Server Error\r\n");
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	printf("\r\n");
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	printf("This is RepoView version %s, named `%s`.\n", rv_get_version(), INSTANCE_NAME);
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	printf("Unrecoverable error has occured.\n");
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	printf("Admin contact: %s\n", INSTANCE_ADMIN);
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	printf("Developer contact: Nishi <nishi@nishi.boats>\n");
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	printf("-----\n");
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}
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3 nishi 41 
int hex_to_num(char c) {
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	if('0' <= c && c <= '9') {
1 nishi 43 
		return c - '0';
3 nishi 44 
	} else if('a' <= c && c <= 'f') {
1 nishi 45 
		return c - 'a' + 10;
3 nishi 46 
	} else if('A' <= c && c <= 'F') {
1 nishi 47 
		return c - 'A' + 10;
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	}
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	return 0;
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}
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3 nishi 52 
char* rv_url_decode(const char* str) {
1 nishi 53 
	char* r = malloc(1);
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	r[0] = 0;
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	int i;
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	char cbuf[2];
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	cbuf[1] = 0;
3 nishi 58 
	for(i = 0; str[i] != 0; i++) {
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		if(str[i] == '%') {
1 nishi 60 
			if(str[i + 1] == 0) break;
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			if(str[i + 2] == 0) break;
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			cbuf[0] = (hex_to_num(str[i + 1]) << 4) | hex_to_num(str[i + 2]);
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			char* tmp = r;
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			r = rv_strcat(tmp, cbuf);
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			free(tmp);
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			i += 2;
3 nishi 67 
		} else {
1 nishi 68 
			cbuf[0] = str[i];
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			char* tmp = r;
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			r = rv_strcat(tmp, cbuf);
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			free(tmp);
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		}
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	}
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	return r;
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}