+++ /dev/null
-/* src/common/readwrite.c
- *
- * This file is part of PlomRogue. PlomRogue is licensed under the GPL version 3
- * or any later version. For details on its copyright, license, and warranties,
- * see the file NOTICE in the root directory of the PlomRogue source package.
- */
-
-#include "readwrite.h"
-#include <stddef.h> /* NULL, size_t */
-#include <stdint.h> /* uint8_t, uint16_t, uint32_t, UINT32_MAX */
-#include <stdio.h> /* FILE, fseek(), sprintf(), fgets(), fgetc(), ferror(),
- * fputc(), fwrite(), fclose(), fopen(), clearerr()
- */
-#include <stdlib.h> /* free() */
-#include <string.h> /* strlen(), memcpy(), strchr() */
-#include <unistd.h> /* access(), unlink() */
-#include "rexit.h" /* exit_err(), exit_trouble() */
-#include "try_malloc.h" /* try_malloc() */
-
-
-
-extern FILE * try_fopen(char * path, char * mode, const char * f)
-{
- char * msg1 = "Trouble in ";
- char * msg2 = " with fopen (mode '";
- char * msg3 = "') on path '";
- char * msg4 = "'.";
- uint16_t size = strlen(msg1) + strlen(msg2) + strlen(msg3) + strlen(msg4)
- + strlen(f) + strlen(path) + strlen(mode) + 1;
- char * msg = try_malloc(size, __func__);
- int test = sprintf(msg, "%s%s%s%s%s%s%s", msg1,f,msg2,mode,msg3,path,msg4);
- exit_trouble(test < 0, __func__, "sprintf");
- FILE * file_p = fopen(path, mode);
- exit_err(!file_p, msg);
- free(msg);
- return file_p;
-}
-
-
-
-extern void try_fclose(FILE * file, const char * f)
-{
- exit_trouble(fclose(file), f, "fclose");
-}
-
-
-
-extern void try_fwrite(void * ptr, size_t size, size_t nmemb, FILE * stream,
- const char * f)
-{
- exit_trouble(0 == fwrite(ptr, size, nmemb, stream), f, "fwrite");
-}
-
-
-
-extern void try_fputc(uint8_t c, FILE * file, const char * f)
-{
- exit_trouble(EOF == fputc(c, file), f, "fputc");
-}
-
-
-
-extern int try_fgetc(FILE * file, const char * f)
-{
- clearerr(file); /* OSX' (BSD?) fgetc() needs this to undo previous EOFs. */
- int test = fgetc(file);
- exit_trouble(EOF == test && ferror(file), f, "fgetc");
- return test;
-}
-
-
-
-extern char * try_fgets(char * line, int linemax, FILE * file, const char * f)
-{
- char * test = fgets(line, linemax, file);
- exit_trouble(!test && ferror(file), f, "fgets");
- return test;
-}
-
-
-
-extern char * build_temp_path(char * path)
-{
- char * suffix_tmp = "_tmp";
- uint16_t size = strlen(path) + strlen(suffix_tmp) + 1;
- char * path_tmp = try_malloc(size, __func__);
- int test = sprintf(path_tmp, "%s%s", path, suffix_tmp);
- exit_trouble(test < 0, __func__, "sprintf");
- return path_tmp;
-}
-
-
-
-extern FILE * atomic_write_start(char * path, char ** path_tmp)
-{
- *path_tmp = build_temp_path(path);
- return try_fopen(*path_tmp, "w", __func__);
-}
-
-
-
-extern void atomic_write_finish(FILE * file, char * path, char * path_tmp)
-{
- try_fclose(file, __func__);
- char * msg1 = "Trouble in ";
- char * msg4 = "'.";
- if (!access(path, F_OK))
- {
- char * msg2 = " with unlink on path '";
- uint16_t size = strlen(msg1) + strlen(msg2) + strlen(msg4)
- + strlen(__func__) + strlen(path) + 1;
- char * msg = try_malloc(size, __func__);
- int test = sprintf(msg, "%s%s%s%s%s", msg1, __func__, msg2, path, msg4);
- exit_trouble(test < 0, __func__, "sprintf");
- exit_err(unlink(path), msg);
- free(msg);
- }
- char * msg2 = " with rename from '";
- char * msg3 = "' to '";
- uint16_t size = strlen(msg1) + strlen(__func__) + strlen(msg2) +
- + strlen(path_tmp) + strlen(msg3) + strlen(path)
- + strlen(msg4) + 1;
- char * msg = try_malloc(size, __func__);
- int test = sprintf(msg, "%s%s%s%s%s%s%s",
- msg1, __func__, msg2, path_tmp, msg3, path, msg4);
- exit_trouble(test < 0, __func__, "sprintf");
- exit_err(rename(path_tmp, path), msg);
- free(msg);
- free(path_tmp);
-}
-
-
-
-extern void detect_atomic_leftover(char * path)
-{
- char * path_tmp = build_temp_path(path);
- char * part1 = "Found file '";
- char * part2 = "' that may be a leftover from an aborted previous attempt "
- "to write '";
- char * part3 = "'. Aborting until the matter is solved by (re-)moving it.";
- uint32_t size = strlen(part1) + strlen(path_tmp) + strlen(part2)
- + strlen(path) + strlen(part3) + 1;
- char * msg = try_malloc(size, __func__);
- int test = sprintf(msg, "%s%s%s%s%s", part1, path_tmp, part2, path, part3);
- exit_trouble(test < 0, __func__, "sprintf");
- exit_err(!access(path_tmp, F_OK), msg);
- free(msg);
- free(path_tmp);
-}
-
-
-
-extern uint32_t textfile_width(FILE * file)
-{
- int c = 0;
- uint32_t c_count = 0;
- uint32_t linemax = 0;
- while (1)
- {
- c = try_fgetc(file, __func__);
- if (EOF == c)
- {
- break;
- }
- c_count++;
- exit_trouble(UINT32_MAX==c_count, __func__, "too large text file line");
- if ('\n' == c)
- {
- if (c_count > linemax)
- {
- linemax = c_count;
- }
- c_count = 0;
- }
- }
- if (0 == linemax && 0 < c_count) /* Handle files that consist of only one */
- { /* line / lack newline chars. */
- linemax = c_count;
- }
- exit_trouble(-1 == fseek(file, 0, SEEK_SET), __func__, "fseek");
- return linemax;
-}
-
-
-
-extern uint8_t read_file_into_queue(FILE * file, char ** queue)
-{
- uint8_t ret = 0;
- int test;
- while (EOF != (test = try_fgetc(file, __func__)))
- {
- ret = 1;
- if ('\0' != test)
- {
- if (*queue)
- {
- char * new_queue = try_malloc(strlen(*queue) + 1 + 1, __func__);
- memcpy(new_queue, *queue, strlen(*queue));
- new_queue[strlen(*queue)] = (char) test;
- new_queue[strlen(*queue) + 1] = '\0';
- free(*queue);
- *queue = new_queue;
- }
- else
- {
- *queue = try_malloc(1 + 1, __func__);
- (*queue)[0] = (char) test;
- (*queue)[1] = '\0';
- }
- }
- }
- return ret;
-}
-
-
-
-extern char * get_message_from_queue(char ** queue)
-{
- if (!(*queue))
- {
- return NULL;
- }
- char * first_nl = strchr(*queue, '\n');
- if (!first_nl)
- {
- return NULL;
- }
- char * msg = try_malloc(first_nl - (*queue) + 1, __func__);
- memcpy(msg, *queue, first_nl - (*queue));
- msg[first_nl - (*queue)] = '\0';
- char * new_queue = try_malloc(strlen(first_nl + 1) + 1, __func__);
- memcpy(new_queue, first_nl + 1, strlen(first_nl + 1) + 1);
- free(*queue);
- *queue = new_queue;
- return msg;
-}
projects / plomrogue / blobdiff