1 /* src/common/parse_file.c */
3 #define _POSIX_C_SOURCE 200809L /* strdup() */
4 #include "parse_file.h"
5 #include <stddef.h> /* size_t, NULL */
6 #include <stdio.h> /* FILE, snprintf() */
7 #include <stdint.h> /* int16_t,uint8_t,uint32_t, INT16_MIN, UINT{8,16,32}_MAX */
8 #include <stdlib.h> /* atoi(), free() */
9 #include <string.h> /* strchr, strcmp(), strdup(), strlen() */
10 #include "rexit.h" /* exit_err(), exit_trouble() */
11 #include "try_malloc.h" /* try_malloc() */
15 /* Set by parse_file(), helps err_line() deciding what to do/output on error. */
16 static uint32_t err_line_count = 0;
17 static char * err_line_line = NULL;
18 static char * err_line_intro = NULL;
19 static uint8_t err_line_exit = 1;
23 /* Determines the end of the token_from_line() token. */
24 static void set_token_end(char ** start, char ** limit_char);
28 static void set_token_end(char ** start, char ** limit_char)
30 char * end_quote = ('\'' == (* start)[0]) ? strchr(* start + 1, '\''): NULL;
31 * start = (end_quote) ? * start + 1 : *start;
35 * limit_char = end_quote;
38 char * space = strchr(*start, ' ');
39 char * tab = strchr(*start, '\t');
40 space = (!space || (tab && tab < space)) ? tab : space;
45 *limit_char = strchr(*start, '\0');
50 extern void set_err_line_options(char * intro, char * line, uint8_t exit)
53 err_line_intro = intro;
59 extern void err_line_inc()
62 err_line(UINT32_MAX == err_line_count, "Line reaches max lines limit.");
67 extern void err_line_zero()
74 extern uint8_t err_line(uint8_t test, char * msg)
80 char * prefix = " Offending line ";
82 size_t size = strlen(err_line_intro) + strlen(msg) + strlen(prefix)
83 + 10 /* strlen for uint32_t representations */
84 + strlen(affix) + strlen(err_line_line) + 1;
85 char * err = try_malloc(size, __func__);
86 int ret = snprintf(err, size, "%s%s%s%d%s%s", err_line_intro, msg, prefix,
87 err_line_count, affix, err_line_line);
88 exit_trouble(ret < 0, __func__, "snprintf");
93 exit_trouble(0 > printf("%s\n", err), __func__, "printf");
94 exit_trouble(EOF == fflush(stdout), __func__, "fflush");
101 extern char * token_from_line(char * line)
103 static char * final_char = NULL;
104 static char * limit_char = NULL;
105 char * start = limit_char + 1;
110 final_char = &(line[strlen(line)]);
111 if ('\n' == *(final_char - 1))
113 *(--final_char) = '\0';
116 if (final_char < start)
122 for (i = 0; '\0' != start[i]; i++)
124 if (' ' != start[i] && '\t' != start[i])
135 set_token_end(&start, &limit_char);
141 extern uint8_t parsetest_int(char * string, char type)
143 char * err_8 = "Value must represent proper unsigned 8 bit integer.";
144 char * err_i = "Value must represent proper signed 16 bit integer.";
145 char * err_u = "Value must represent proper unsigned 16 bit integer.";
146 char * err_U = "Value must represent proper unsigned 32 bit integer.";
147 char * err = ('8' == type) ? err_8 : err_U;
148 err = ('i' == type) ? err_i : err;
149 err = ('u' == type) ? err_u : err;
150 uint8_t ret = err_line(strlen(string) < 1, err);
153 for (i = 0; '\0' != string[i]; i++)
155 char * err_many = "Value of too many characters.";
156 ret = ret + err_line(string[i + 1] && UINT8_MAX == i, err_many);
157 test = ( (0 == i && ('-' == string[i] || '+' == string[i]))
158 || ('0' <= string[i] && string[i] <= '9'));
159 ret = ret + err_line(!test, err);
161 ret = ret + err_line( strlen(string) < 2
162 && ('-' == string[i] || '+' == string[i]), err);
164 && ( strlen(string) > 4
165 || atoi(string) < 0 || atoi(string) > UINT8_MAX))
167 && ( strlen(string) > 6
168 || atol(string) < INT16_MIN || atol(string) > INT16_MAX))
170 && ( strlen(string) > 6
171 || atoll(string) < 0 || atol(string) > UINT16_MAX))
173 && ( strlen(string) > 11
174 || atoll(string) < 0 || atoll(string) > UINT32_MAX));
175 ret = ret + err_line(test, err);
181 extern uint8_t parsetest_singlechar(char * string)
183 return err_line(1 !=strlen(string),"Value must be single ASCII character.");
188 extern uint8_t parse_val(char * token0, char * token1, char * comparand,
189 char type, char * element)
191 if (!strcmp(token0, comparand))
195 free(* (char **) element);
196 * (char **) element = strdup(token1);
198 else if ('c' == type)
200 if (!parsetest_singlechar(token1))
202 *element = (token1)[0];
205 else if (!parsetest_int(token1, type))
209 * (uint8_t *) element = atoi(token1);
211 else if ('i' == type)
213 * (int16_t *) element = atoi(token1);
215 else if ('u' == type)
217 * (uint16_t *) element = atol(token1);
219 else if ('U' == type)
221 * (uint32_t *) element = atoll(token1);