terom@17: #include "error.h"
terom@17: 
terom@18: /*
terom@18:  * Mapping for error codes
terom@18:  */
terom@17: const char *error_names[PT_ERR_MAX] = {
terom@17:     [PT_SUCCESS]                = "Success",
terom@65:     [PT_ERR]                    = "Unspecified error",
terom@17:     [PT_ERR_MEM]                = "malloc()",
terom@17: 
terom@17:     [PT_ERR_PATH]               = "path",
terom@17:     [PT_ERR_OPEN_MODE]          = "open_mode",
terom@17:     
terom@17:     [PT_ERR_IMG_STAT]           = "stat(.png)",
terom@69:     [PT_ERR_IMG_OPEN]           = "open(.png)",
terom@69:     [PT_ERR_IMG_FORMAT]         = "Unknown image format",
terom@17:     
terom@17:     [PT_ERR_PNG_CREATE]         = "png_create()",
terom@17:     [PT_ERR_PNG]                = "png_*()",
terom@17:    
terom@17:     [PT_ERR_CACHE_STAT]         = "stat(.cache)",
terom@17:     [PT_ERR_CACHE_OPEN_READ]    = "open(.cache)",
terom@17:     [PT_ERR_CACHE_OPEN_TMP]     = "open(.tmp)",
terom@17:     [PT_ERR_CACHE_SEEK]         = "seek(.cache)",
terom@17:     [PT_ERR_CACHE_READ]         = "read(.cache)",
terom@17:     [PT_ERR_CACHE_WRITE]        = "write(.cache)",
terom@17:     [PT_ERR_CACHE_TRUNC]        = "truncate(.cache)",
terom@17:     [PT_ERR_CACHE_MMAP]         = "mmap(.cache)",
terom@17:     [PT_ERR_CACHE_RENAME_TMP]   = "rename(.tmp, .cache)",
terom@56:     [PT_ERR_CACHE_VERSION]      = "Incompatible .cache version",
terom@59:     [PT_ERR_CACHE_MUNMAP]       = "munmap(cache->file)",
terom@59:     [PT_ERR_CACHE_CLOSE]        = "close(cache->fd)",
terom@17: 
terom@19:     [PT_ERR_PTHREAD_CREATE]     = "pthread_create",
terom@19:     [PT_ERR_CTX_SHUTDOWN]       = "pt_ctx is shutting down",
terom@19: 
terom@86:     [PT_ERR_TILE_DIM]           = "Invalid tile dimensions",
terom@17:     [PT_ERR_TILE_CLIP]          = "Tile outside of image",
terom@86:     [PT_ERR_TILE_ZOOM]          = "Invalid zoom level",
terom@17: };
terom@17: 
terom@17: const char *pt_strerror (int err)
terom@17: {
terom@17:     if (err < 0)
terom@17:         err = -err;
terom@17: 
terom@17:     if (err < PT_SUCCESS || err >= PT_ERR_MAX)
terom@65:         return "Invalid error code";
terom@65:     
terom@65:     else if (!error_names[err])
terom@65:         return "Missing string for error code";
terom@65: 
terom@17:     else
terom@17:         return error_names[err];
terom@17: }