52 lines
1.9 KiB
C
52 lines
1.9 KiB
C
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/* Glue functions for the minIni library, based on the C/C++ stdio library and
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* using BSD-style file locking to "serialize" concurrent accesses to an INI
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* file. It presumes GCC compiler extensions.
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*
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* By CompuPhase, 2020
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* This "glue file" is in the public domain. It is distributed without
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* warranties or conditions of any kind, either express or implied.
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*/
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/* map required file I/O types and functions to the standard C library */
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/file.h>
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#define INI_FILETYPE FILE*
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static inline int ini_openread(const char *filename, INI_FILETYPE *file) {
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if ((*file = fopen((filename),"r")) == NULL)
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return 0;
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return flock(fileno(*file), LOCK_SH) == 0;
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}
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static inline int ini_openwrite(const char *filename, INI_FILETYPE *file) {
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if ((*file = fopen((filename),"r+")) == NULL
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&& (*file = fopen((filename),"w")) == NULL)
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return 0;
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if (flock(fileno(*file), LOCK_EX) < 0)
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return 0;
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return ftruncate(fileno(*file), 0);
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}
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#define INI_OPENREWRITE
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static inline int ini_openrewrite(const char *filename, INI_FILETYPE *file) {
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if ((*file = fopen((filename),"r+")) == NULL)
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return 0;
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return flock(fileno(*file), LOCK_EX) == 0;
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}
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#define ini_close(file) (fclose(*(file)) == 0)
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#define ini_read(buffer,size,file) (fgets((buffer),(size),*(file)) != NULL)
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#define ini_write(buffer,file) (fputs((buffer),*(file)) >= 0)
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#define ini_rename(source,dest) (rename((source), (dest)) == 0)
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#define INI_FILEPOS long int
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#define ini_tell(file,pos) (*(pos) = ftell(*(file)))
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#define ini_seek(file,pos) (fseek(*(file), *(pos), SEEK_SET) == 0)
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/* for floating-point support, define additional types and functions */
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#define INI_REAL float
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#define ini_ftoa(string,value) sprintf((string),"%f",(value))
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#define ini_atof(string) (INI_REAL)strtod((string),NULL)
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