diff options
Diffstat (limited to 'src/3rdparty/xkbcommon/src/xkbcomp/scanner-utils.h')
-rw-r--r-- | src/3rdparty/xkbcommon/src/xkbcomp/scanner-utils.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/3rdparty/xkbcommon/src/xkbcomp/scanner-utils.h b/src/3rdparty/xkbcommon/src/xkbcomp/scanner-utils.h new file mode 100644 index 0000000000..7e21b00662 --- /dev/null +++ b/src/3rdparty/xkbcommon/src/xkbcomp/scanner-utils.h @@ -0,0 +1,145 @@ +/* + * Copyright © 2012 Ran Benita <ran234@gmail.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef XKBCOMP_SCANNER_UTILS_H +#define XKBCOMP_SCANNER_UTILS_H + +/* Point to some substring in the file; used to avoid copying. */ +struct sval { + const char *start; + unsigned int len; +}; +typedef darray(struct sval) darray_sval; + +static inline bool +svaleq(struct sval s1, struct sval s2) +{ + return s1.len == s2.len && strncmp(s1.start, s2.start, s1.len) == 0; +} + +static inline bool +svaleq_prefix(struct sval s1, struct sval s2) +{ + return s1.len <= s2.len && strncmp(s1.start, s2.start, s1.len) == 0; +} + +struct scanner { + const char *s; + size_t pos; + size_t len; + char buf[1024]; + size_t buf_pos; + int line, column; + /* The line/column of the start of the current token. */ + int token_line, token_column; + const char *file_name; + struct xkb_context *ctx; +}; + +static inline void +scanner_init(struct scanner *s, struct xkb_context *ctx, + const char *string, size_t len, const char *file_name) +{ + s->s = string; + s->len = len; + s->pos = 0; + s->line = s->column = 1; + s->token_line = s->token_column = 1; + s->file_name = file_name; + s->ctx = ctx; +} + +static inline char +peek(struct scanner *s) +{ + return s->pos < s->len ? s->s[s->pos] : '\0'; +} + +static inline bool +eof(struct scanner *s) +{ + return s->pos >= s->len; +} + +static inline bool +eol(struct scanner *s) +{ + return peek(s) == '\n'; +} + +static inline char +next(struct scanner *s) +{ + if (eof(s)) + return '\0'; + if (eol(s)) { + s->line++; + s->column = 1; + } + else { + s->column++; + } + return s->s[s->pos++]; +} + +static inline bool +chr(struct scanner *s, char ch) +{ + if (peek(s) != ch) + return false; + s->pos++; s->column++; + return true; +} + +static inline bool +str(struct scanner *s, const char *string, size_t len) +{ + if (s->len - s->pos < len) + return false; + if (strncasecmp(s->s + s->pos, string, len) != 0) + return false; + s->pos += len; s->column += len; + return true; +} + +#define lit(s, literal) str(s, literal, sizeof(literal) - 1) + +static inline bool +buf_append(struct scanner *s, char ch) +{ + if (s->buf_pos + 1 >= sizeof(s->buf)) + return false; + s->buf[s->buf_pos++] = ch; + return true; +} + +static inline bool +oct(struct scanner *s, uint8_t *out) +{ + int i; + for (i = 0, *out = 0; peek(s) >= '0' && peek(s) <= '7' && i < 3; i++) + *out = *out * 8 + next(s) - '0'; + return i > 0; +} + +#endif |