/*
通用C语言函数：文本文件有关操作，.CFG/.INI类配置文件读写。我们知道WINDOWS下的软件可以使用.INI文件
处理程序配置，那么在DOS、UNIX、AS/400上又如何才能读写.CFG/.INI类配置文件? 你可以使用本程序的有关函
数很方便地实现。注：AS/400上输入和显示[]有些问题，所以用{}代替来将section名括起。
GCFTXTF.C -- General C functions for Text File Read/Write
M.L.Y 2000.1.1
MODIFIED (YYYY.MM.DD)
M.L.Y 2000.01.01 - Creation
*/
#if __OS400__ /* AS/400 */
#include "GCFTXTFH"
#else
# include "GCFTXTF.H"
#endif
struct txt_line_flds txt_line_fld[MAX_TXT_LINE_FLD];
char CFG_ssl = '[', CFG_ssr = ']'; /* .CFG/.INI file section symbol */
int CFG_section_line_no, CFG_key_line_no, CFG_key_lines;
/* ------------------------------------------------------------------------- */
int fgetline(FILE *fp, USGC *buffer, int maxlen)
/*
Read 1 line text into *buffer from file *fp, return length actually read.
maxlen --- max. length of *buffer
CR or LF is not put into *buffer
FF(0x0C) is put into *buffer and then return
Ctrl-Z(0x1A) is put into *buffer and then return
If EOF was detected then return -1
If an error occurred then return -2
M.L.Y 1995.06.09, 07.31, 1998.9.9
*/
{
#if __OS400__ /* AS/400 */
int i;
memset(buffer, 0x00, maxlen);
if(fgets(buffer, maxlen, fp) == NULL)
{
i = strlen(buffer);
if(feof(fp) != 0)
{
if(i == 0) return -1; /* EOF */
}
else return -2; /* error */
}
i = strlen(buffer);
if(i > 0 && buffer[i-1] == '\n')
buffer[--i] = '\0';
return i;
#else
int i, j;
USGC ch1;
for(i = 0, j = 0; i < maxlen; j++)
{
if(fread(&ch1, sizeof(USGC), 1, fp) != 1)
{
if(feof(fp) != 0)
{
if(j == 0) return -1; /* EOF */
else break;
}
if(ferror(fp) != 0) return -2; /* error */
return -2;
}
else
{
if(ch1 == '\n' || ch1 == 0x00) break; /* end of line */
if(ch1 == '\f' || ch1 == 0x1A) /* '\f': Form Feed */
{
buffer[i++] = ch1;
break;
}
if(ch1 != '\r') buffer[i++] = ch1; /* ignore CR */
}
}
buffer[i] = '\0';
return i;
#endif
}
/* ------------------------------------------------------------------------- */
int copy_txt_file(void *source_file, void *dest_file)
/*
Copy source_file to dest_file
Return code:
0 -- Ok
<0 -- Error
M.L.Y 1996.7, 2000.11
*/
{
FILE *fp1, *fp2;
USGC buf[1024+1];
int rc;
if((fp1 = fopen((char *)source_file, "r")) == NULL)
return COPYF_ERR_OPEN_FILE;
rc = COPYF_ERR_CREATE_FILE;
#if __OS400__ /* AS/400 */
if((fp2 = fopen((char *)dest_file, "w, lrecl=92, ccsid=935")) == NULL)
goto copy_end;
#else
if((fp2 = fopen((char *)dest_file, "w")) == NULL) goto copy_end;
#endif
while(1)
{
rc = COPYF_ERR_READ_FILE;
memset(buf, 0x00, 1024+1);
if(fgets((char *)buf, 1024, fp1) == NULL)
{
if(mstrlen(buf) == 0)
{
if(ferror(fp1) != 0) goto copy_end;
break; /* EOF */
}
}
rc = COPYF_ERR_WRITE_FILE;
if(fputs((char *)buf, fp2) == EOF) goto copy_end;
}
rc = COPYF_OK;
copy_end:
if(fp2 != NULL) fclose(fp2);
if(fp1 != NULL) fclose(fp1);
return rc;
}
/* ------------------------------------------------------------------------- */
int split_txt_line_fld(char *txt_line, char *sep_chars)
/*
Split a text line fields info to struct txt_line_fld
Return fld number
e.g.: fld1 = fld2, fld3, "fld4", 'fld5'
key = value
M.L.Y 2000.8.2
*/
{
int i, j, k, n, stat = 0, quote_stat = 0;
char quote;
n = strlen(txt_line);
for(i = 0, j = 0, k = 0; i <= n; i++)
{
if(i >= n ||
(strchr(sep_chars, txt_line[i]) != NULL && quote_stat == 0))
{
if(stat == 0) continue;
stat = 0; /* is separate char */
txt_line_fld[k].fldsp = j;
txt_line_fld[k].fldlen = i - j;
k++;
}
else
{
if(txt_line[i] == '\'' || txt_line[i] == '\"')
{
if(quote_stat == 0)
{
quote = txt_line[i]; /* " or ' */
quote_stat = 1; /* enter " " or ' ' */
}
else
{
if(txt_line[i] == quote)
quote_stat = 0; /* withdraw from " " or ' ' */
}
}
if(stat == 1) continue;
stat = 1; /* is normal char */
j = i; /* fld start pointer */
}
}
return k; /* fld number */
}
/* ------------------------------------------------------------------------- */
char *get_txt_line_fld(char *txt_line, int fldno, char *buf)
/*
After split a text line fields info to struct txt_line_fld,
get the fldno fld to buf
Return buf
M.L.Y 2000.8.2
*/
{
memmove(buf, txt_line + txt_line_fld[fldno].fldsp,
txt_line_fld[fldno].fldlen);
buf[txt_line_fld[fldno].fldlen] = '\0';
return buf;
}
/* ------------------------------------------------------------------------- */
int split_key_val(USGC *buf, USGC **key, USGC **val)
/*
Split key=val pair:
xxx = yyyyyyyy
| | |
k1 k2 i
return:
1 --- ok
0 --- blank line
-1 --- no key, "= val"
-2 --- only key, no '='
M.L.Y 2000.8, 2000.11
*/
{
int i, k1, k2, n;
if((n = strlen((char *)buf)) < 1) return 0;
for(i = 0; i < n; i++)
if(buf[i] != ' ' && buf[i] != '\t') break;
if(i >= n) return 0;
if(buf[i] == '=') return -1;
k1 = i;
for(i++; i < n; i++)
if(buf[i] == '=') break;
if(i >= n) return -2;
k2 = i;
for(i++; i < n; i++)
if(buf[i] != ' ' && buf[i] != '\t') break;
buf[k2] = '\0';
*key = buf + k1;
*val = buf + i;
return 1;
}
/* ------------------------------------------------------------------------- */
int CFG_get_key(void *CFG_file, void *section, void *key, void *buf)
/*
Note:
section --- not include [] or {}
key --- may include blank space
blank line or begin with ';' for remarks
line end with '+' for line to be continued
Return:
0 --- ok
<0 --- error
*/
{
FILE *fp;
USGC buf1[MAX_CFG_BUF + 1], buf2[MAX_CFG_BUF + 1];
USGC *key_ptr, *val_ptr;
int line_no, n, rc;
line_no = 0;
CFG_section_line_no = 0;
CFG_key_line_no = 0;
CFG_key_lines = 0;
#if __OS400__ /* AS/400 */
if((fp = fopen((char *)CFG_file, "r")) == NULL) return CFG_ERR_OPEN_FILE;
#else
if((fp = fopen((char *)CFG_file, "rb")) == NULL) return CFG_ERR_OPEN_FILE;
#endif
while(1) /* seek section */
{
rc = CFG_ERR_READ_FILE;
n = fgetline(fp, buf1, MAX_CFG_BUF);
if(n < -1) goto r_cfg_end;
rc = CFG_SECTION_NOT_FOUND;
if(n < 0) goto r_cfg_end; /* EOF, not found */
line_no++;
n = mstrlen(ltrimstr(rtrimstr(buf1)));
if(n == 0 || buf1[0] == ';') continue; /* blank/remarks line */
rc = CFG_ERR_FILE_FORMAT;
if(n > 2 && ((buf1[0] == '[' && buf1[n-1] != ']') ||
(buf1[0] == '{' && buf1[n-1] != '}')))
goto r_cfg_end;
if(buf1[0] == '[' || buf1[0] == '{')
{
buf1[n-1] = 0x00;
if(mstrcmp(buf1+1, section) == 0)
break; /* section found */
}
}
CFG_section_line_no = line_no;
while(1) /* seek key */
{
rc = CFG_ERR_READ_FILE;
n = fgetline(fp, buf1, MAX_CFG_BUF);
if(n < -1) goto r_cfg_end;
rc = CFG_KEY_NOT_FOUND;
if(n < 0) goto r_cfg_end; /* EOF, key not found */
line_no++;
CFG_key_line_no = line_no;
CFG_key_lines = 1;
n = mstrlen(ltrimstr(rtrimstr(buf1)));
if(n == 0 || buf1[0] == ';') continue; /* blank/remarks line */
rc = CFG_KEY_NOT_FOUND;
if(buf1[0] == '[' || buf1[0] == '{') goto r_cfg_end;
if(buf1[n-1] == '+') /* to be continued */
{
buf1[n-1] = 0x00;
while(1)
{
rc = CFG_ERR_READ_FILE;
n = fgetline(fp, buf2, MAX_CFG_BUF);
if(n < -1) goto r_cfg_end;
if(n < 0) break; /* EOF */
line_no++;
CFG_key_lines++;
n = mstrlen(rtrimstr(buf2));
rc = CFG_ERR_EXCEED_BUF_SIZE;
if(n > 0 && buf2[n-1] == '+') /* to be continued */
{
buf2[n-1] = 0x00;
if(mstrlen(buf1) + mstrlen(buf2) > MAX_CFG_BUF)
goto r_cfg_end;
mstrcat(buf1, buf2);
continue;
}
if(mstrlen(buf1) + mstrlen(buf2) > MAX_CFG_BUF)
goto r_cfg_end;
mstrcat(buf1, buf2);
break;
}
}
rc = CFG_ERR_FILE_FORMAT;
if(split_key_val(buf1, &key_ptr, &val_ptr) != 1)
goto r_cfg_end;
ltrimstr(rtrimstr(key_ptr));
if(mstrcmp(key_ptr, key) != 0)
continue; /* not same key */
mstrcpy(buf, val_ptr);
break;
}
rc = CFG_OK;
r_cfg_end:
if(fp != NULL) fclose(fp);
return rc;
}
/* ------------------------------------------------------------------------- */
int CFG_set_key(void *CFG_file, void *section, void *key, void *buf)
/*
Note:
section --- not include [] or {}
key --- may include blank space
not use '+' for line to be continued
Return:
0 --- ok
<0 --- error
*/
{
FILE *fp1, *fp2;
USGC buf1[MAX_CFG_BUF + 1], buf2[MAX_CFG_BUF + 1];
int line_no, line_no1, n, rc, rc2;
char *tmpfname;
rc = CFG_get_key(CFG_file, section, key, buf1);
if(rc <= CFG_ERR && rc != CFG_ERR_OPEN_FILE) return rc;
if(rc == CFG_ERR_OPEN_FILE || rc == CFG_SECTION_NOT_FOUND)
{
#if __OS400__ /* AS/400 */
if((fp1 = fopen((char *)CFG_file, "a, lrecl=92, ccsid=935")) == NULL)
#else
if((fp1 = fopen((char *)CFG_file, "a")) == NULL)
#endif
return CFG_ERR_CREATE_FILE;
#if __OS400__ /* AS/400 */
CFG_ssl = '{';
CFG_ssr = '}'; /* .CFG/.INI file section symbol */
#else
CFG_ssl = '[';
CFG_ssr = ']'; /* .CFG/.INI file section symbol */
#endif
if(fprintf(fp1, "%c%s%c\n", CFG_ssl, section, CFG_ssr) == EOF)
{
fclose(fp1);
return CFG_ERR_WRITE_FILE;
}
if(fprintf(fp1, "%s=%s\n", key, buf) == EOF)
{
fclose(fp1);
return CFG_ERR_WRITE_FILE;
}
fclose(fp1);
return CFG_OK;
}
if((tmpfname = tmpnam(NULL)) == NULL)
return CFG_ERR_CREATE_FILE;
#if __OS400__ /* AS/400 */
if((fp2 = fopen(tmpfname, "w, lrecl=92, ccsid=935")) == NULL)
#else
if((fp2 = fopen(tmpfname, "w")) == NULL)
#endif
return CFG_ERR_CREATE_FILE;
rc2 = CFG_ERR_OPEN_FILE;
#if __OS400__ /* AS/400 */
if((fp1 = fopen((char *)CFG_file, "r")) == NULL) goto w_cfg_end;
#else
if((fp1 = fopen((char *)CFG_file, "rb")) == NULL) goto w_cfg_end;
#endif
if(rc == CFG_KEY_NOT_FOUND)
line_no1 = CFG_section_line_no;
else /* rc = CFG_OK */
line_no1 = CFG_key_line_no - 1;
for(line_no = 0; line_no < line_no1; line_no++)
{
rc2 = CFG_ERR_READ_FILE;
n = fgetline(fp1, buf1, MAX_CFG_BUF);
if(n < 0) goto w_cfg_end;
rc2 = CFG_ERR_WRITE_FILE;
if(fprintf(fp2, "%s\n", buf1) == EOF) goto w_cfg_end;
}
if(rc != CFG_KEY_NOT_FOUND)
for( ; line_no < line_no1+CFG_key_lines; line_no++)
{
rc2 = CFG_ERR_READ_FILE;
n = fgetline(fp1, buf1, MAX_CFG_BUF);
if(n < 0) goto w_cfg_end;
}
rc2 = CFG_ERR_WRITE_FILE;
if(fprintf(fp2, "%s=%s\n", key, buf) == EOF) goto w_cfg_end;
while(1)
{
rc2 = CFG_ERR_READ_FILE;
n = fgetline(fp1, buf1, MAX_CFG_BUF);
if(n < -1) goto w_cfg_end;
if(n < 0) break;
rc2 = CFG_ERR_WRITE_FILE;
if(fprintf(fp2, "%s\n", buf1) == EOF) goto w_cfg_end;
}
rc2 = CFG_OK;
w_cfg_end:
if(fp1 != NULL) fclose(fp1);
if(fp2 != NULL) fclose(fp2);
if(rc2 == CFG_OK)
{
rc = copy_txt_file(tmpfname, CFG_file);
if(rc != 0) return CFG_ERR_CREATE_FILE;
}
remove(tmpfname);
return rc2;
}
/* ------------------------------------------------------------------------- */
int CFG_get_sections(void *CFG_file, USGC *sections[])
/*
取.CFG/.INI等配置文件的所有section名字（用[]或
{}括起的，不返回括弧），返回section个数。若出错，
返回负数。
*/
{
FILE *fp;
USGC buf1[MAX_CFG_BUF + 1];
int n, n_sections = 0, rc;
#if __OS400__ /* AS/400 */
if((fp = fopen(CFG_file, "r")) == NULL) return CFG_ERR_OPEN_FILE;
#else
if((fp = fopen(CFG_file, "rb")) == NULL) return CFG_ERR_OPEN_FILE;
#endif
while(1) /* seek section */
{
rc = CFG_ERR_READ_FILE;
n = fgetline(fp, buf1, MAX_CFG_BUF);
if(n < -1) goto cfg_scts_end;
if(n < 0) break; /* EOF */
n = mstrlen(ltrimstr(rtrimstr(buf1)));
if(n == 0 || buf1[0] == ';') continue; /* blank/remarks line */
rc = CFG_ERR_FILE_FORMAT;
if(n > 2 && ((buf1[0] == '[' && buf1[n-1] != ']') ||
(buf1[0] == '{' && buf1[n-1] != '}')))
goto cfg_scts_end;
if(buf1[0] == '[' || buf1[0] == '{')
{
buf1[n-1] = 0x00;
mstrcpy(sections[n_sections], buf1+1);
n_sections++;
}
}
rc = n_sections;
cfg_scts_end:
if(fp != NULL) fclose(fp);
return rc;
}
/* ------------------------------------------------------------------------- */
int CFG_get_keys(void *CFG_file, void *section, USGC *keys[])
/*
取.CFG/.INI等配置文件的某个section下的所有key的
名字（key=value形式, value可用加号表示续行），返回
key个数。若出错，返回负数。
*/
{
FILE *fp;
USGC buf1[MAX_CFG_BUF + 1], buf2[MAX_CFG_BUF + 1];
USGC *key_ptr, *val_ptr;
int n, n_keys = 0, rc;
#if __OS400__ /* AS/400 */
if((fp = fopen(CFG_file, "r")) == NULL) return CFG_ERR_OPEN_FILE;
#else
if((fp = fopen(CFG_file, "rb")) == NULL) return CFG_ERR_OPEN_FILE;
#endif
while(1) /* seek section */
{
rc = CFG_ERR_READ_FILE;
n = fgetline(fp, buf1, MAX_CFG_BUF);
if(n < -1) goto cfg_keys_end;
rc = CFG_SECTION_NOT_FOUND;
if(n < 0) goto cfg_keys_end; /* EOF, not found */
n = mstrlen(ltrimstr(rtrimstr(buf1)));
if(n == 0 || buf1[0] == ';') continue; /* blank/remarks line */
rc = CFG_ERR_FILE_FORMAT;
if(n > 2 && ((buf1[0] == '[' && buf1[n-1] != ']') ||
(buf1[0] == '{' && buf1[n-1] != '}')))
goto cfg_keys_end;
if(buf1[0] == '[' || buf1[0] == '{')
{
buf1[n-1] = 0x00;
if(mstrcmp(buf1+1, section) == 0)
break; /* section found */
}
}
while(1)
{
rc = CFG_ERR_READ_FILE;
n = fgetline(fp, buf1, MAX_CFG_BUF);
if(n < -1) goto cfg_keys_end;
if(n < 0) break; /* EOF */
n = mstrlen(ltrimstr(rtrimstr(buf1)));
if(n == 0 || buf1[0] == ';') continue; /* blank/remarks line */
rc = CFG_KEY_NOT_FOUND;
if(buf1[0] == '[' || buf1[0] == '{')
break; /* another section */
if(buf1[n-1] == '+') /* to be continued */
{
buf1[n-1] = 0x00;
while(1)
{
rc = CFG_ERR_READ_FILE;
n = fgetline(fp, buf2, MAX_CFG_BUF);
if(n < -1) goto cfg_keys_end;
if(n < 0) break; /* EOF */
n = mstrlen(rtrimstr(buf2));
rc = CFG_ERR_EXCEED_BUF_SIZE;
if(n > 0 && buf2[n-1] == '+') /* to be continued */
{
buf2[n-1] = 0x00;
if(mstrlen(buf1) + mstrlen(buf2) > MAX_CFG_BUF)
goto cfg_keys_end;
mstrcat(buf1, buf2);
continue;
}
if(mstrlen(buf1) + mstrlen(buf2) > MAX_CFG_BUF)
goto cfg_keys_end;
mstrcat(buf1, buf2);
break;
}
}
rc = CFG_ERR_FILE_FORMAT;
if(split_key_val(buf1, &key_ptr, &val_ptr) != 1)
goto cfg_keys_end;
ltrimstr(rtrimstr(key_ptr));
mstrcpy(keys[n_keys], key_ptr);
n_keys++;
}
rc = n_keys;
cfg_keys_end:
if(fp != NULL) fclose(fp);
return rc;
}
/* ------------------------------------------------------------------------- */
int read_txt_line(void *TXT_file, int line_no, void *buf)
/*
读文本文件中指定行号（以1始计）的内容到buf
返回行内容长度，出错返回负数。
*/
{
FILE *fp;
int lno, n1;
USGC buf1[256];
if((fp = fopen((char *)TXT_file, "r")) == NULL) return TXTF_ERR_OPEN_FILE;
for(lno = 0; lno < line_no; lno++)
{
memset(buf1, 0x00, 256);
if(fgets((char *)buf1, 255, fp) == NULL)
{
n1 = mstrlen(buf1);
if(n1 == 0)
{
if(ferror(fp) != 0)
{
fclose(fp);
return TXTF_ERR_READ_FILE;
}
break;
}
break;
}
}
if(lno < line_no)
{
fclose(fp);
return TXTF_ERR_NOT_FOUND;
}
n1 = mstrlen(buf1);
if(n1 > 0 && buf1[n1-1] == '\n') buf1[--n1] = 0x00;
mstrcpy(buf, buf1);
fclose(fp);
return n1;
}
/* ------------------------------------------------------------------------- */
int seek_txt_line(void *TXT_file, void *line_tag, void *buf)
/*
查找文本文件中以line_tag内容开始的行，读其内容到
buf，返回行号（以1始计），出错返回负数。
*/
{
FILE *fp;
int line_no, n, n1;
USGC buf1[256];
n = mstrlen(line_tag);
if((fp = fopen((char *)TXT_file, "r")) == NULL) return TXTF_ERR_OPEN_FILE;
for(line_no = 1; ; line_no++)
{
memset(buf1, 0x00, 256);
if(fgets((char *)buf1, 255, fp) == NULL)
{
n1 = mstrlen(buf1);
if(n1 == 0)
{
if(ferror(fp) != 0)
{
fclose(fp);
return TXTF_ERR_READ_FILE;
}
fclose(fp); /* eof */
return TXTF_ERR_NOT_FOUND;
}
if(mstrncmp(buf1, line_tag, n) == 0) break;
fclose(fp); /* eof */
return TXTF_ERR_NOT_FOUND;
}
if(mstrncmp(buf1, line_tag, n) == 0) break;
}
n1 = mstrlen(buf1);
if(n1 > 0 && buf1[n1-1] == '\n') buf1[--n1] = 0x00;
mstrcpy(buf, buf1);
fclose(fp);
return line_no;
}
2007年7月24日星期二
C源码:通用C语言函数：文本文件有关操作，.CFG/.INI类配置文件读写
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