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1 /*
2  * Copyright © 2017 Thomas Helland
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  *
23  */
24 #ifndef _STRING_BUFFER_H
25 #define _STRING_BUFFER_H
26 
27 #include "ralloc.h"
28 #include "u_string.h"
29 #include <stdbool.h>
30 #include <stdint.h>
31 #include <stdio.h>
32 #include <string.h>
33 
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37 
38 struct _mesa_string_buffer {
39    char *buf;
40    uint32_t length;
41    uint32_t capacity;
42 };
43 
44 struct _mesa_string_buffer *
45 _mesa_string_buffer_create(void *mem_ctx, uint32_t initial_capacity);
46 
47 static inline void
_mesa_string_buffer_destroy(struct _mesa_string_buffer * str)48 _mesa_string_buffer_destroy(struct _mesa_string_buffer *str)
49 {
50    ralloc_free(str);
51 }
52 
53 bool
54 _mesa_string_buffer_append_all(struct _mesa_string_buffer *str,
55                                uint32_t num_args, ...);
56 bool
57 _mesa_string_buffer_append_len(struct _mesa_string_buffer *str,
58                                const char *c, uint32_t len);
59 
60 static inline bool
_mesa_string_buffer_append_char(struct _mesa_string_buffer * str,char c)61 _mesa_string_buffer_append_char(struct _mesa_string_buffer *str, char c)
62 {
63    return _mesa_string_buffer_append_len(str, &c, 1);
64 }
65 
66 static inline bool
_mesa_string_buffer_append(struct _mesa_string_buffer * str,const char * c)67 _mesa_string_buffer_append(struct _mesa_string_buffer *str, const char *c)
68 {
69    return _mesa_string_buffer_append_len(str, c, strlen(c));
70 }
71 
72 static inline void
_mesa_string_buffer_clear(struct _mesa_string_buffer * str)73 _mesa_string_buffer_clear(struct _mesa_string_buffer *str)
74 {
75    str->length = 0;
76    str->buf[str->length] = '\0';
77 }
78 
79 static inline void
_mesa_string_buffer_crimp_to_fit(struct _mesa_string_buffer * str)80 _mesa_string_buffer_crimp_to_fit(struct _mesa_string_buffer *str)
81 {
82     char *crimped =
83        (char *) reralloc_array_size(str, str->buf, sizeof(char),
84                                     str->capacity);
85     if (!crimped)
86        return;
87 
88     str->capacity = str->length + 1;
89     str->buf = crimped;
90 }
91 
92 bool
93 _mesa_string_buffer_vprintf(struct _mesa_string_buffer *str,
94                             const char *format, va_list args);
95 
96 bool
97 _mesa_string_buffer_printf(struct _mesa_string_buffer *str,
98                             const char *format, ...);
99 
100 #ifdef __cplusplus
101 } /* extern "C" */
102 #endif
103 
104 #endif /* _STRING_BUFFER_H */
105