| /* |
| * Copyright (c) 2013-2019, Intel Corporation |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * * Neither the name of Intel Corporation nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef FILE_H |
| #define FILE_H |
| |
| #include <stddef.h> |
| |
| /* Provides linewise access to a string. |
| * Access to the lines is guarded by the text_line function. |
| */ |
| struct text { |
| /* Number of lines. */ |
| size_t n; |
| |
| /* Each line[0] to line[n-1] points to the start of the |
| * corresponding line. |
| */ |
| char **line; |
| }; |
| |
| /* Allocates new text. |
| * |
| * Note, if s is NULL or the empty string the text has zero lines. |
| * |
| * Returns a non-NULL text object on success; NULL otherwise. |
| */ |
| extern struct text *text_alloc(const char *s); |
| |
| /* Deallocates @t. |
| * If @t is the NULL pointer, nothing happens. |
| */ |
| extern void text_free(struct text *t); |
| |
| /* Initializes @t with @s. All "\n" or "\r\n" lineendings, will be |
| * replaced with '\0'. |
| * |
| * Returns 0 on success; a negative enum errcode otherwise. |
| * Returns -err_internal if @t is the NULL pointer. |
| */ |
| extern int text_parse(struct text *t, const char *s); |
| |
| /* Copies at most @destlen characters of line @n from text @t to @dest. |
| * The line counts start with 0. |
| * If @dest is the NULL pointer just the line number is checked. |
| * |
| * Returns 0 on success; a negative enum errcode otherwise. |
| * Returns -err_internal if @t is the NULL pointer or if @dest is the |
| * NULL pointer, but @destlen is non-zero. |
| * Returns -err_out_of_range if @n is not in the range. |
| * |
| * Note, the string is always null byte terminated on success. |
| */ |
| extern int text_line(const struct text *t, char *dest, size_t destlen, |
| size_t n); |
| |
| /* Provides access to lines of files. Access to all files is cached |
| * after the first request. |
| * |
| * By convention, the first file_list element in the list is the head |
| * and stores no file information. |
| */ |
| struct file_list { |
| /* Name of the file. */ |
| char *filename; |
| |
| /* The content of the file. */ |
| struct text *text; |
| |
| /* Points to the next file list entry. It's NULL if the |
| * current file_list is the last entry in the list. |
| */ |
| struct file_list *next; |
| }; |
| |
| /* Allocates a new file list. |
| * |
| * Returns a non-NULL file list object on succes; NULL otherwise. |
| */ |
| extern struct file_list *fl_alloc(void); |
| |
| /* Deallocates @fl. |
| * If @fl is the NULL pointer, nothing happens. |
| */ |
| extern void fl_free(struct file_list *fl); |
| |
| /* Looks up line @n in a file @filename. The line content is stored in |
| * @dest, which should have a capacity of @destlen. |
| * If @dest is the NULL pointer just the line number is checked. |
| * See function text_line how the line is copied to @dest. |
| * The file @filename is loaded implicitly. |
| * |
| * Returns 0 on success; a negative enum errcode otherwise. |
| * Returns -err_internal if @fl or @filename is the NULL pointer or if |
| * @dest is the NULL pointer, but @destlen is non-zero. |
| * Returns -err_out_of_range if n is not a valid line number. |
| * Returns -err_file_stat if @filename could not be found. |
| * Returns -err_file_open if @filename could not be opened. |
| * Returns -err_file_read if the content of @filename could not be fully |
| * read. |
| */ |
| extern int fl_getline(struct file_list *fl, char *dest, size_t destlen, |
| const char *filename, size_t n); |
| |
| /* Looks up the text for @filename and stores its contents in @t. |
| * The file @filename is loaded implicitly. |
| * |
| * Returns 0 on success; a negative enum errcode otherwise. |
| * Returns -err_internal if @fl or @t or @filename is the NULL pointer. |
| * Returns -err_file_stat if @filename could not be found. |
| * Returns -err_file_open if @filename could not be opened. |
| * Returns -err_file_read if the content of @filename could not be fully |
| * read. |
| */ |
| extern int fl_gettext(struct file_list *fl, const struct text **t, |
| const char *filename); |
| |
| #endif /* FILE_H */ |