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RRTcodebaseC

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void dc_trim(char* buf)
{
dc_ltrim(buf);
dc_rtrim(buf);
}
void dc_strlower_in_place(char* in)
{
char* p = in;
for ( ; *p; p++) {
*p = tolower(*p);
}
}
char* dc_strlower(const char* in) /* the result must be free()'d */
{
char* out = dc_strdup(in);
char* p = out;
for ( ; *p; p++) {
*p = tolower(*p);
}
return out;
}
/*
* haystack may be realloc()'d, returns the number of replacements.
*/
int dc_str_replace(char** haystack, const char* needle, const char* replacement)
{
int replacements = 0;
int start_search_pos = 0;
int needle_len = 0;
int replacement_len = 0;
if (haystack==NULL || *haystack==NULL || needle==NULL || needle[0]==0) {
return 0;
}
needle_len = strlen(needle);
replacement_len = replacement? strlen(replacement) : 0;
while (1)
{
char* p2 = strstr((*haystack)+start_search_pos, needle);
if (p2==NULL) { break; }
start_search_pos = (p2-(*haystack))+replacement_len; /* avoid recursion and skip the replaced part */
*p2 = 0;
p2 += needle_len;
char* new_string = dc_mprintf("%s%s%s", *haystack, replacement? replacement : "", p2);
free(*haystack);
*haystack = new_string;
replacements++;
}
return replacements;
}
int dc_str_contains(const char* haystack, const char* needle)
{
/* case-insensitive search of needle in haystack, return 1 if found, 0 if not */
if (haystack==NULL || needle==NULL) {
return 0;
}
if (strstr(haystack, needle)!=NULL) {
return 1;
}
char* haystack_lower = dc_strlower(haystack);
char* needle_lower = dc_strlower(needle);
int ret = strstr(haystack_lower, needle_lower)? 1 : 0;
free(haystack_lower);
free(needle_lower);
return ret;
}
/**
* Creates a null-terminated string from a buffer.
* Similar to strndup() but allows bad parameters and just halts the program
* on memory allocation errors.
*
* @param in The start of the string.
* @param bytes The number of bytes to take from the string.
* @return The null-terminates string, must be free()'d by the caller.
* On memory-allocation errors, the program halts.
* On other errors, an empty string is returned.
*/
char* dc_null_terminate(const char* in, int bytes) /* the result must be free()'d */