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/* See LICENSE file for copyright and license details. */
#include "common.h"
static char *
substitute(struct libgeome_context *ctx, const char *text, uint64_t features)
{
size_t len = 0, sublen;
size_t i;
int negative, include;
uint64_t if_features, digit;
char *ret, *p;
for (i = 0; text[i];) {
if (text[i] != '%') {
i += 1U;
len += 1U;
} else if (text[i + 1U] == '%') {
i += 2U;
len += 1U;
} else if (text[i + 1U] == '{') {
i += 2U;
negative = text[i] == '!';
i += (size_t)negative;
if_features = 0;
for (; isdigit(text[i]); i++) {
digit = (uint64_t)(text[i] & 15);
if (if_features > (UINT64_MAX - digit) / 10U)
goto invalid;
if_features = if_features * 10U + digit;
}
if (!if_features || text[i++] != ':')
goto invalid;
include = !!(if_features & features);
include ^= negative;
sublen = 0;
for (;;) {
if (text[i] == '}') {
i += 1U;
break;
} else if (!text[i]) {
goto invalid;
} else if (text[i] != '%') {
i += 1U;
sublen += 1U;
} else if (text[i + 1U] == '%') {
i += 1U;
sublen += 2U;
} else if (text[i + 1U] == '}') {
i += 1U;
sublen += 2U;
} else {
goto invalid;
}
}
if (include ^ negative)
len += sublen;
} else {
invalid:
ctx->print_error(ctx, "invalid %-pattern in `%s'\n", text);
return NULL;
}
}
p = ret = malloc(len + 1U);
if (!ret) {
ctx->print_error(ctx, "malloc: %s\n", strerror(errno));
return NULL;
}
while (*text) {
if (*text != '%') {
*p++ = *text++;
} else if (text[i + 1U] == '%') {
text = &text[2];
*p++ = '%';
} else if (text[i + 1U] == '{') {
text = &text[2];
negative = *text == '!';
text = &text[negative];
if_features = 0;
while (isdigit(*text)) {
digit = (uint64_t)(*text++ & 15);
if_features = if_features * 10U + digit;
}
text++;
include = !!(if_features & features);
include ^= negative;
for (; *text != '}'; text++) {
if (include)
*p++ = text[*text == '%'];
if (*text == '%')
text++;
}
text++;
}
}
*p = '\0';
return ret;
}
int
libgeome_get_from_patterned_command(struct libgeome_context *ctx, struct libgeome_data *out, size_t limit, /* TODO test */
unsigned int alarm_sec, const char *path, const char *const *argv)
{
const char **argv_new = NULL;
char **array;
size_t count = 0;
size_t index = 0;
size_t i, argc = 0;
int ret = -1;
if (strchr(path, '%'))
count += 1U;
for (i = 0; argv[i]; i++)
if (strchr(argv[i], '%'))
count += 1U;
argc = i;
if (!count)
return libgeome_get_from_patterned_command(ctx, out, limit, alarm_sec, path, argv);
array = calloc(count, sizeof(*array));
if (!array) {
ctx->print_error(ctx, "calloc: %s\n", strerror(errno));
return -1;
}
if (strchr(path, '%')) {
path = array[index++] = substitute(ctx, path, out->requested_data);
if (!path)
goto out;
}
if (index != count) {
argv_new = calloc(argc + 1U, sizeof(*argv_new));
if (!argv_new) {
ctx->print_error(ctx, "calloc: %s\n", strerror(errno));
goto out;
}
argv_new[argc] = NULL;
for (i = 0; argv[i]; i++) {
if (strchr(argv[i], '%')) {
argv_new[i] = array[index++] = substitute(ctx, argv[i], out->requested_data);
if (!argv_new[i])
goto out;
} else {
argv_new[i] = argv[i];
}
}
argv = argv_new;
}
ret = libgeome_get_from_patterned_command(ctx, out, limit, alarm_sec, path, argv);
out:
for (i = 0; i < count; i++)
free(array[i]);
free(array);
free(argv_new);
return ret;
}
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