X-Git-Url: https://plomlompom.com/repos/berlin_corona.txt?a=blobdiff_plain;ds=inline;f=src%2Fcommon%2Freadwrite.c;fp=src%2Fcommon%2Freadwrite.c;h=0000000000000000000000000000000000000000;hb=a50806df8116a81729220bd79870639b18da9d8c;hp=94150f17b515b723fe70d43adfafae8be3455775;hpb=3a308dfb8b0ede5ab0a23d867cdf33394825538e;p=plomrogue diff --git a/src/common/readwrite.c b/src/common/readwrite.c deleted file mode 100644 index 94150f1..0000000 --- a/src/common/readwrite.c +++ /dev/null @@ -1,236 +0,0 @@ -/* 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 /* NULL, size_t */ -#include /* uint8_t, uint16_t, uint32_t, UINT32_MAX */ -#include /* FILE, fseek(), sprintf(), fgets(), fgetc(), ferror(), - * fputc(), fwrite(), fclose(), fopen(), clearerr() - */ -#include /* free() */ -#include /* strlen(), memcpy(), strchr() */ -#include /* 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; -}