mirror of
https://github.com/obsproject/obs-studio.git
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281 lines
6.5 KiB
C
281 lines
6.5 KiB
C
/*
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* Copyright (c) 2023 Lain Bailey <lain@obsproject.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#pragma once
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#include "c99defs.h"
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#include "dstr.h"
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#include "darray.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* ------------------------------------------------------------------------- */
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/* string reference (string segment within an already existing array) */
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struct strref {
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const char *array;
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size_t len;
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};
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static inline void strref_clear(struct strref *dst)
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{
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dst->array = NULL;
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dst->len = 0;
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}
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static inline void strref_set(struct strref *dst, const char *array, size_t len)
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{
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dst->array = array;
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dst->len = len;
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}
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static inline void strref_copy(struct strref *dst, const struct strref *src)
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{
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dst->array = src->array;
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dst->len = src->len;
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}
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static inline void strref_add(struct strref *dst, const struct strref *t)
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{
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if (!dst->array)
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strref_copy(dst, t);
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else
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dst->len += t->len;
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}
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static inline bool strref_is_empty(const struct strref *str)
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{
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return !str || !str->array || !str->len || !*str->array;
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}
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EXPORT int strref_cmp(const struct strref *str1, const char *str2);
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EXPORT int strref_cmpi(const struct strref *str1, const char *str2);
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EXPORT int strref_cmp_strref(const struct strref *str1,
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const struct strref *str2);
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EXPORT int strref_cmpi_strref(const struct strref *str1,
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const struct strref *str2);
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/* ------------------------------------------------------------------------- */
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EXPORT bool valid_int_str(const char *str, size_t n);
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EXPORT bool valid_float_str(const char *str, size_t n);
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static inline bool valid_int_strref(const struct strref *str)
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{
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return valid_int_str(str->array, str->len);
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}
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static inline bool valid_float_strref(const struct strref *str)
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{
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return valid_float_str(str->array, str->len);
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}
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static inline bool is_whitespace(char ch)
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{
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return ch == ' ' || ch == '\r' || ch == '\t' || ch == '\n';
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}
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static inline bool is_newline(char ch)
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{
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return ch == '\r' || ch == '\n';
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}
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static inline bool is_space_or_tab(const char ch)
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{
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return ch == ' ' || ch == '\t';
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}
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static inline bool is_newline_pair(char ch1, char ch2)
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{
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return (ch1 == '\r' && ch2 == '\n') || (ch1 == '\n' && ch2 == '\r');
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}
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static inline int newline_size(const char *array)
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{
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if (strncmp(array, "\r\n", 2) == 0 || strncmp(array, "\n\r", 2) == 0)
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return 2;
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else if (*array == '\r' || *array == '\n')
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return 1;
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return 0;
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}
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/* ------------------------------------------------------------------------- */
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/*
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* A "base" token is one of four things:
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* 1.) A sequence of alpha characters
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* 2.) A sequence of numeric characters
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* 3.) A single whitespace character if whitespace is not ignored
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* 4.) A single character that does not fall into the above 3 categories
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*/
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enum base_token_type {
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BASETOKEN_NONE,
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BASETOKEN_ALPHA,
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BASETOKEN_DIGIT,
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BASETOKEN_WHITESPACE,
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BASETOKEN_OTHER,
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};
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struct base_token {
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struct strref text;
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enum base_token_type type;
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bool passed_whitespace;
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};
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static inline void base_token_clear(struct base_token *t)
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{
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memset(t, 0, sizeof(struct base_token));
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}
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static inline void base_token_copy(struct base_token *dst,
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struct base_token *src)
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{
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memcpy(dst, src, sizeof(struct base_token));
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}
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/* ------------------------------------------------------------------------- */
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#define LEX_ERROR 0
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#define LEX_WARNING 1
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struct error_item {
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char *error;
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const char *file;
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uint32_t row, column;
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int level;
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};
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static inline void error_item_init(struct error_item *ei)
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{
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memset(ei, 0, sizeof(struct error_item));
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}
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static inline void error_item_free(struct error_item *ei)
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{
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bfree(ei->error);
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error_item_init(ei);
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}
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static inline void error_item_array_free(struct error_item *array, size_t num)
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{
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size_t i;
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for (i = 0; i < num; i++)
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error_item_free(array + i);
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}
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/* ------------------------------------------------------------------------- */
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struct error_data {
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DARRAY(struct error_item) errors;
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};
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static inline void error_data_init(struct error_data *data)
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{
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da_init(data->errors);
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}
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static inline void error_data_free(struct error_data *data)
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{
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error_item_array_free(data->errors.array, data->errors.num);
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da_free(data->errors);
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}
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static inline const struct error_item *error_data_item(struct error_data *ed,
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size_t idx)
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{
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return ed->errors.array + idx;
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}
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EXPORT char *error_data_buildstring(struct error_data *ed);
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EXPORT void error_data_add(struct error_data *ed, const char *file,
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uint32_t row, uint32_t column, const char *msg,
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int level);
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static inline size_t error_data_type_count(struct error_data *ed, int type)
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{
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size_t count = 0, i;
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for (i = 0; i < ed->errors.num; i++) {
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if (ed->errors.array[i].level == type)
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count++;
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}
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return count;
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}
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static inline bool error_data_has_errors(struct error_data *ed)
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{
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size_t i;
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for (i = 0; i < ed->errors.num; i++)
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if (ed->errors.array[i].level == LEX_ERROR)
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return true;
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return false;
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}
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/* ------------------------------------------------------------------------- */
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struct lexer {
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char *text;
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const char *offset;
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};
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static inline void lexer_init(struct lexer *lex)
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{
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memset(lex, 0, sizeof(struct lexer));
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}
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static inline void lexer_free(struct lexer *lex)
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{
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bfree(lex->text);
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lexer_init(lex);
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}
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static inline void lexer_start(struct lexer *lex, const char *text)
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{
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lexer_free(lex);
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lex->text = bstrdup(text);
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lex->offset = lex->text;
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}
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static inline void lexer_start_move(struct lexer *lex, char *text)
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{
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lexer_free(lex);
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lex->text = text;
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lex->offset = lex->text;
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}
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static inline void lexer_reset(struct lexer *lex)
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{
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lex->offset = lex->text;
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}
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enum ignore_whitespace { PARSE_WHITESPACE, IGNORE_WHITESPACE };
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EXPORT bool lexer_getbasetoken(struct lexer *lex, struct base_token *t,
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enum ignore_whitespace iws);
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EXPORT void lexer_getstroffset(const struct lexer *lex, const char *str,
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uint32_t *row, uint32_t *col);
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#ifdef __cplusplus
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}
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#endif
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