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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* split_line.c
*
* Copyright (C) 2023 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "util/parse.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
static split_line_t *append_arg(split_line_t *in, char *arg)
{
split_line_t *out = realloc(in, sizeof(*in) +
(in->count + 1) * sizeof(char *));
if (out == NULL) {
free(in);
return NULL;
}
out->args[out->count++] = arg;
return out;
}
static int is_sep(const char *sep, int c)
{
return strchr(sep, c) != NULL && c != '\0';
}
int split_line(char *line, size_t len, const char *sep, split_line_t **out)
{
split_line_t *split = calloc(1, sizeof(*split));
char *src = line, *dst = line;
if (split == NULL)
return SPLIT_LINE_ALLOC;
while (len > 0 && is_sep(sep, *src)) {
++src;
--len;
}
while (len > 0 && *src != '\0') {
split = append_arg(split, dst);
if (split == NULL)
return SPLIT_LINE_ALLOC;
if (*src == '"') {
++src;
--len;
while (len > 0 && *src != '\0' && *src != '"') {
if (src[0] == '\\') {
if (len < 2)
goto fail_esc;
if (src[1] != '"' && src[1] != '\\')
goto fail_esc;
*(dst++) = src[1];
src += 2;
len -= 2;
} else {
*(dst++) = *(src++);
--len;
}
}
if (len == 0 || *src != '"')
goto fail_quote;
++src;
--len;
} else {
while (len > 0 && !is_sep(sep, *src) && *src != '\0') {
*(dst++) = *(src++);
--len;
}
}
while (len > 0 && is_sep(sep, *src)) {
++src;
--len;
}
*(dst++) = '\0';
}
*out = split;
return SPLIT_LINE_OK;
fail_esc:
free(split);
return SPLIT_LINE_ESCAPE;
fail_quote:
free(split);
return SPLIT_LINE_UNMATCHED_QUOTE;
}
void split_line_remove_front(split_line_t *split, size_t count)
{
if (count < split->count) {
for (size_t i = count, j = 0; i < split->count; ++i, ++j)
split->args[j] = split->args[i];
split->count -= count;
} else {
split->count = 0;
}
}
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