4 #include <stdio.h> /* for FILE typedef, fopen(), fgetc(), fputc(), fseek(),
5 * sprintf(), fwrite(), ferror()
7 #include <stdint.h> /* for uint8_t, uint16_t, uint32_t */
8 #include <string.h> /* for strlen() */
9 #include <unistd.h> /* for unlink() */
10 #include "rexit.h" /* for exit_err(), exit_trouble() */
11 #include "main.h" /* for world global */
15 extern FILE * try_fopen(char * path, char * mode, char * f)
17 char * msg1 = "Trouble in ";
18 char * msg2 = " with fopen() (mode '";
19 char * msg3 = "') on path '";
21 uint16_t size = strlen(msg1) + strlen(msg2) + strlen(msg3) + strlen(msg4)
22 + strlen(f) + strlen(path) + strlen(mode) + 1;
24 sprintf(msg, "%s%s%s%s%s%s%s", msg1, f, msg2, mode, msg3, path, msg4);
25 FILE * file_p = fopen(path, mode);
26 exit_err(NULL == file_p, msg);
32 extern void try_fclose(FILE * file, char * f)
34 exit_trouble(fclose(file), f, "fclose()");
39 extern void try_fwrite(void * ptr, size_t size, size_t nmemb, FILE * stream,
42 exit_trouble(0 == fwrite(ptr, size, nmemb, stream), f, "fwrite()");
47 extern char * try_fgets(char * line, int linemax, FILE * file, char * f)
49 char * test = fgets(line, linemax, file);
50 exit_trouble(NULL == test && ferror(file), f, "fgets()");
56 extern uint8_t try_fgetc(FILE * file, char * f)
58 int test = fgetc(file);
59 exit_trouble(EOF == test, f, "fgetc() unexpectedly hitting EOF");
60 return (uint8_t) test;
65 extern void try_fputc(uint8_t c, FILE * file, char * f)
67 int test = fputc(c, file);
68 exit_trouble(EOF == test, f, "fputc() hitting EOF");
73 extern void try_fclose_unlink_rename(FILE * file, char * p1, char * p2,
77 char * msg1 = "Trouble in ";
79 if (!access(p2, F_OK))
81 char * msg2 = " with unlink() on path '";
82 uint16_t size = strlen(msg1) + strlen(msg2) + strlen(msg4)
83 + strlen(f) + strlen(p2) + 1;
85 sprintf(msg, "%s%s%s%s%s", msg1, f, msg2, p2, msg4);
86 exit_err(unlink(p2), msg);
88 char * msg2 = " with rename() from '";
89 char * msg3 = "' to '";
90 uint16_t size = strlen(msg1) + strlen(f) + strlen(msg2) + strlen(p1)
91 + strlen(msg3) + strlen(p2) + strlen(msg4) + 1;
93 sprintf(msg, "%s%s%s%s%s%s%s", msg1, f, msg2, p1, msg3, p2, msg4);
94 exit_err(rename(p1, p2), msg);
99 extern uint16_t get_linemax(FILE * file, char * f)
102 exit_trouble(textfile_sizes(file, &linemax, NULL), f, "textfile_sizes()");
108 extern uint8_t textfile_sizes(FILE * file, uint16_t * linemax_p,
109 uint16_t * n_lines_p)
112 uint16_t c_count = 0;
113 uint16_t n_lines = 0;
114 uint16_t linemax = 0;
125 if (c_count > linemax)
136 if (0 == linemax && 0 < c_count) /* Handle files that consist of only one */
137 { /* line / lack newline chars. */
141 if (-1 == fseek(file, 0, SEEK_SET))
145 * linemax_p = linemax;
148 * n_lines_p = n_lines;
155 extern uint32_t read_uint32_bigendian(FILE * file)
157 char * f_name = "read_uint32_bigendian()";
159 x = (uint32_t) try_fgetc(file, f_name) << 24;
160 x = x + ( (uint32_t) try_fgetc(file, f_name) << 16 );
161 x = x + ( (uint32_t) try_fgetc(file, f_name) << 8 );
162 x = x + (uint32_t) try_fgetc(file, f_name);
168 extern void write_uint32_bigendian(uint32_t x, FILE * file)
170 char * f_name = "write_uint32_bigendian()";
171 try_fputc( x >> 24, file, f_name);
172 try_fputc( ( x >> 16 ) & 0xFF, file, f_name);
173 try_fputc( ( x >> 8 ) & 0xFF, file, f_name);
174 try_fputc( x & 0xFF, file, f_name);