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// Copyright (C) 2023 Mistivia <i@mistivia.com>
// Licensed under GPLv3. See LICENSE for details.
#include "str.h"
#include <ctype.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "vec.h"
void *str_split(const char *str, char delim) {
void* ret = new_vec();
if (str == NULL) return NULL;
if (*str == '\n') {
return ret;
}
int count = 0;
const char *begin = str;
for (const char *p = str; *p != '\0'; p++) {
if (*p != delim && !(delim == '\0' && isspace(*p))) {
continue;
}
int size = p - begin;
if (size > 0) count++;
}
count++;
begin = str;
int i = 0;
bool finished = false;
for (const char *p = str; !finished; p++) {
if (*p == '\0') finished = true;
if (*p != delim && *p != '\0' && !(delim == '\0' && isspace(*p))) {
continue;
}
int size = p - begin;
if (size == 0) {
begin = p + 1;
continue;
}
char *buf = malloc(sizeof(char) * (size + 1));
buf[size] = '\0';
memcpy(buf, begin, size * sizeof(char));
begin = p + 1;
vec_push_back(ret, buf);
}
return ret;
}
char *str_strip(const char *str) {
if (str == NULL) return NULL;
int len = strlen(str);
const char *begin = str;
const char *end = str + len - 1;
while (isspace(*begin) && begin < end) {
begin++;
}
while (isspace(*end) && end >= begin) {
end--;
}
len = end - begin + 1;
char *buf = malloc(sizeof(char) * (len) + 1);
buf[len] = '\0';
memcpy(buf, begin, len);
return buf;
}
typedef struct {
size_t size;
size_t cap;
char *buf;
} str_builder_t;
// string stream
void* new_ss() {
str_builder_t *self = malloc(sizeof(str_builder_t));
*self = (str_builder_t){.size = 0, .cap = 16};
self->buf = malloc(sizeof(char) * 17);
return self;
}
static void ss_reserve(str_builder_t *self, int extra) {
if (self->size + extra <= self->cap) {
return;
}
int new_cap = (self->size + extra) * 2;
self->buf = realloc(self->buf, new_cap + 1);
memset(self->buf + self->cap, 0, new_cap - self->cap + 1);
self->cap = new_cap;
}
void ss_add(void *self_, char *format, ...) {
str_builder_t *self = self_;
va_list va1;
va_list va2;
va_start(va1, format);
va_copy(va2, va1);
int size = vsnprintf(NULL, 0, format, va1);
ss_reserve(self, size);
vsnprintf(self->buf + self->size, self->cap - self->size + 1, format, va2);
self->size += size;
}
void ss_addc(void *self_, char c) {
str_builder_t *self = self_;
ss_reserve(self, 1);
self->buf[self->size] = c;
self->size++;
}
char *ss_cstr(void *self_) {
str_builder_t *self = self_;
return self->buf;
}
size_t ss_size(void *self_) {
str_builder_t *self = self_;
return self->size;
}
char *fgetline(FILE *fp) {
void *ss = new_ss();
while (true) {
int c = fgetc(fp);
if (c == EOF && ss_size(ss) == 0) return NULL;
if (c != EOF) ss_addc(ss, c);
if (c == EOF || c == '\n') return ss_cstr(ss);
}
return NULL;
}
int fpeek(FILE *fp) {
int c = fgetc(fp);
if (c == EOF) return c;
ungetc(c, fp);
return c;
}
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