1 files changed, 0 insertions, 187 deletions
diff --git a/dynstr.h b/dynstr.h
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index 302902d..0000000
--- a/dynstr.h
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-/*
- * dynstr.h - dynamic C string library
- *
- * This is a library for managing dynamic C strings of bytes (not
- * multibyte characters).
- *
- * Each dynamic string is immutable: once created, it cannot be modified.
- * To achieve changes, create new strings. This allows an implementation
- * of the API to make use of copy-on-write techniques to save memory,
- * and avoid unnecessary copying.
- *
- * Dynamic allocation can fail. By default, the routines in this library
- * return NULL for failures. The caller may use the 
- * dynstr_set_malloc_error_handler function to set a function that gets
- * called before NULL is returned. This function can, for example, abort
- * the program (see dynstr_malloc_error_abort), or use longjmp to jump
- * some error handling routine.
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef DYNSTR_H
-#define DYNSTR_H
-
-#include <stdarg.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stddef.h>
-
-
-/* Version number of the shared library. */
-#define DYNSTR_VERSION_MAJOR 0
-#define DYNSTR_VERSION_MINOR 0
-#define DYNSTR_VERSION_PATCH 0
-
-
-/* Magic value returned by functions that search for things within
- * dynamic strings, to indicate 'not found'. */
-#define DYNSTR_NOT_FOUND (~(size_t)0)
-
-
-/* The abstract type for dynamic strings. The type is opaque: the caller
- * may only operate on it using the functions declared in this header. */
-typedef struct Dynstr Dynstr;
-
-
-/* Initialize or re-initialize the library. This sets all global variables
- * used internally to their defaults. This is mainly useful for unit
- * tests. */
-void dynstr_init(void);
-
-/* Set the memory allocator to use, instead of malloc. This is mainly
- * useful for unit tests. */
-void dynstr_set_malloc(void *(*allocator)(size_t));
-
-/* Get the memory allocator being used. This is mainly useful for unit 
- * tests. */
-void *(*dynstr_get_malloc(void))(size_t);
-
-/* Type of callback functions for handling malloc failures. */
-typedef void dynstr_error_handler(int error, size_t size, void *oldptr);
-
-/* Get and set malloc error handler. */
-dynstr_error_handler *dynstr_get_malloc_error_handler(void);
-void dynstr_set_malloc_error_handler(dynstr_error_handler *handler);
-
-/* Malloc error handler that aborts the program (using abort, not exit). */
-void dynstr_malloc_error_abort(int error, size_t size, void *oldptr);
-
-/* Malloc error handler that does nothing. This is the default handler.
- * It causes NULL to be returned. */
-void dynstr_malloc_error_indicate(int error, size_t size, void *oldptr);
-
-
-/* Create a new, empty string. */
-Dynstr *dynstr_new_empty(void);
-
-/* Create a new string, copy contents from a NUL-terminated C string. */
-Dynstr *dynstr_new_from_cstring(const char *cstring);
-
-/* Create a new string, copy contents from an arbitrary memory area. */
-Dynstr *dynstr_new_from_memory(const void *mem, size_t size);
-
-/* Create a new string, use contents from a constant C string. The caller
- * MUST make sure the contents of the C string do not change while the
- * dynamic string exists, since the dynamic string will not copy the
- * contents, but use it directly. */
-Dynstr *dynstr_new_from_constant_cstring(const char *cstring);
-
-/* Create a new string, use contents from an arbitrary memory area. The caller
- * MUST make sure the contents of the memory area do not change while the
- * dynamic string exists, since the dynamic string will not copy the
- * contents, but use it directly. */
-Dynstr *dynstr_new_from_constant_memory(const void *mem, size_t size);
-
-/* Free a dynamic string. */
-void dynstr_free(Dynstr *dynstr);
-
-/* Return length of dynamic string, in bytes. */
-size_t dynstr_len(Dynstr *dynstr);
-
-/* Is the dynamic string empty? In other words, is its length 0? */
-bool dynstr_is_empty(Dynstr *dynstr);
-
-/* Create a new string, copying its contents from an existing one. */
-Dynstr *dynstr_substr(Dynstr *dynstr, size_t offset, size_t size);
-
-/* Create a new string by catenating two existing ones. Return NULL on
- * failure. */
-Dynstr *dynstr_cat(Dynstr *dynstr1, Dynstr *dynstr2);
-
-/* Create a new string by catenating zero or more existing ones. The
- * argument list has zero or more pointers to dynamic strings, and
- * then a NULL pointer. */
-Dynstr *dynstr_cat_many(Dynstr *dynstr, ...);
-
-/* Return value of byte at a given offset. The value is non-negative. If
- * the offset is past the end of the string, -1 is returned. */
-int dynstr_byte_at(Dynstr *dynstr, size_t offset);
-
-/* Copy contents of a dynamic string into a memory area. If the offset or 
- * size extends past the end of the string, only as much as actually exists 
- * in the string is actually copied. The rest of the output memory area will 
- * be filled with garbage. Return number of bytes actually copied, which may 
- * be less than requested, and may be zero. */
-size_t dynstr_memcpy(void *mem, Dynstr *dynstr, size_t offset, size_t size);
-
-/* Create a dynamically allocated C string copy of the dynamic string.
- * This is like strdup. If the dynamic string contains NUL bytes, then
- * that is the caller's problem. Return pointer to the C string. The
- * caller is responsible for freeing it. Return NULL on error. */
-char *dynstr_strdup(Dynstr *dynstr);
-
-/* Search for first or last byte with a given value in a string, 
- * starting at a given offset and until the end of the string. Return offset 
- * of matching byte, or DYNSTR_NOT_FOUND if not found. Offset is from 
- * beginning of string. */
-size_t dynstr_first_byte(Dynstr *dynstr, size_t offset, int byte);
-size_t dynstr_last_byte(Dynstr *dynstr, size_t offset, int byte);
-
-/* Search for first or last occurrence of a substring in a string, 
- * starting at a given offset and until the end of the string. Return 
- * offset of match, or DYNSTR_NOT_FOUND if not found. Offset is from 
- * beginning of string. */
-size_t dynstr_first_string(Dynstr *dynstr, size_t offset, Dynstr *pattern);
-size_t dynstr_last_string(Dynstr *dynstr, size_t offset, Dynstr *pattern);
-
-/* Compare two strings, return 0 if they are equal, negative if the
- * first comes before the second, and positive if second comes first.
- * Comparisons are done byte-by-byte using unsigned values. */
-int dynstr_cmp(Dynstr *dynstr1, Dynstr *dynstr2);
-
-/* Write a dynamic string into an open file (using stdio). Return value is 
- * number of bytes written, just like for fwrite(3).
- * If an error occurs, the size is less than the length of the string,
- * and errno has been set by fwrite(3). */
-size_t dynstr_fwrite(FILE *file, Dynstr *dynstr);
-
-/* Write a dynamic string into an open Unix file handle. Return value is 
- * number of bytes written, or -1. */
-ssize_t dynstr_write(int file, Dynstr *dynstr);
-
-/* Read a number of bytes from an open file, either FILE or a Unix file
- * handle. Return value is the string that was read. The string is empty
- * to indicate EOF, or NULL for error. */
-Dynstr *dynstr_fread(FILE *file, size_t size);
-Dynstr *dynstr_read(int file, size_t size);
-
-/* Read a line from an open file, either a FILE or a Unix file handle.
- * The line ends with the first newline byte, or at the end of the file.
- * If there was an error, NULL is returned, and errno is set, and the
- * partially read line is discarded. */
-Dynstr *dynstr_freadline(FILE *file);
-Dynstr *dynstr_readline(int file);
-
-#endif