46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
#include "runtime/string_input.h"
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#include "runtime/alloc.h"
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#include <string.h>
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typedef struct {
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const char *string;
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size_t position;
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size_t length;
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} TSStringInput;
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const char *ts_string_input_read(void *payload, size_t *bytes_read) {
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TSStringInput *input = (TSStringInput *)payload;
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if (input->position >= input->length) {
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*bytes_read = 0;
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return "";
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}
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size_t previous_position = input->position;
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input->position = input->length;
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*bytes_read = input->position - previous_position;
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return input->string + previous_position;
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}
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int ts_string_input_seek(void *payload, size_t character, size_t byte) {
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TSStringInput *input = (TSStringInput *)payload;
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input->position = byte;
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return (byte < input->length);
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}
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TSInput ts_string_input_make(const char *string) {
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TSStringInput *input = ts_malloc(sizeof(TSStringInput));
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if (!input)
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goto error;
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input->string = string;
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input->position = 0;
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input->length = strlen(string);
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return (TSInput){
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.payload = input,
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.read_fn = ts_string_input_read,
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.seek_fn = ts_string_input_seek,
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.encoding = TSInputEncodingUTF8,
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};
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error:
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return (TSInput){ NULL, NULL, NULL, TSInputEncodingUTF8 };
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}
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